Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "alloy aluminum" wg kryterium: Temat


Tytuł:
Influence of effectiveness speed in mechanical properties of AW6060 T66 (PA38) alloy
Autorzy:
Panasiuk, K.
Powiązania:
https://bibliotekanauki.pl/articles/247214.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
alloy aluminum
static load
dynamic load
yield strength
strength limit
Opis:
The article examines the effect of the change in the speed of deformation on the mechanical properties of AW 6060 alloy specimens, characterized by high mechanical strength, which is a material used in the shipbuilding industry. The theoretical basis for the influence of load speed on the mechanical properties of materials is presented. Static and dynamic tensile test was conducted on a universal testing machine. Dynamic stretching was performed on samples at 10–1 s–1 – 102 s–1. Done charts and tables showing results. Calculated in accordance with DIN EN ISO 6892-1 2010P total elongation and contraction of the sample. Comparison of the results of the study with the current knowledge of the subject. Material studies have shown that increasing the deformation rate results in an increase in the yield point and tensile strength. On the basis of calculations of the narrowing and elongation of the total sample, the material can be strengthened. The rate of deformation of the materials is favourable for their strengthening by increasing the limit of tensile strength. Given that most of the design is subject to dynamic loads and the aluminum alloy AW 6060 finds extensive use in shipbuilding and beyond, these are satisfactory results.
Źródło:
Journal of KONES; 2017, 24, 4; 219-226
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dependency of The Technological Quality of Elements Made From An Aluminum Alloy on Their Shape in The Water Jet Machining
Autorzy:
Wantuch, E.
Kudelski, R.
Nieciąg, H.
Powiązania:
https://bibliotekanauki.pl/articles/99513.pdf
Data publikacji:
2013
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
water jet
machining
quality
aluminum alloy
Opis:
The problem of the technological quality of elements is one of the primary problems of modern machine production. In many cases, elements are made from new construction materials with specific properties considered to have poor machinability in cases where conventional technologies are applied. Thus, there is a need to identify the capabilities of new technologies, including the technology of cutting with a high-pressure abrasive water jet for the production of elements made of Al alloys, while observing qualitative machining requirements. This paper presents the results of studies of the accuracy of production of elements with a complex shape made of a 2017A alloy (PA6) and of studies of the coarseness of obtained surfaces depending on the pressure of the water jet, cutting advance rate, and the amount of dosed abrasive for a constant thickness of the element. The measure of the accuracy of production, independent of dimensional accuracy, was assumed to be the size of chamfering on the side surface of the cut element caused by a specific mechanism of material decohesion occurring under the influence of water jet technology. In cases where Al alloys are cut, depending on assumed conditions, it is possible to shape the side surface of an element with a positive, negative, or neutral (zero) wall inclination (side of the element). In the process of cutting, specific errors in the shape of the element occur and appear on curved fragments of the object or in discontinuous areas of the profile (e.g. transition from a straight fragment to an arc fragment); this is caused by a shift in the exit of the high-pressure abrasive water jet from the object relative to the point of entry. Consequently, selection of cutting parameters for the water jet method for elements with complex shapes is, in essence, a compromise between the obtained inclination of the wall of the processed element and the required surface coarseness, and between the required (acceptable) inclination of the wall of the element or lack thereof and the obtained coarseness of the elements surface. Thus, in the outlined problem, it is not possible to simultaneously obtain two satisfactory criteria quantities of element quality, that is, accuracy of shape and requisite coarseness of the surface of the machined element, if the water jet method is applied for the purpose of machining Al alloys.
Źródło:
Journal of Machine Engineering; 2013, 13, 4; 35-46
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of FSW welding parameters on the tensile strength of aluminum alloys
Autorzy:
Serier, Mohamed
Berrahou, Mohamed
Tabti, Affaf
Bendaoudi, Seif-E
Powiązania:
https://bibliotekanauki.pl/articles/94104.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
tensile strength
friction stir welding
aluminum alloy
ANOVA
Opis:
The friction stir welding process is an innovative technique for joining metals using plasticity, without presenting the fusion. It was first applied to aluminum alloys, for example copper, steel alloys, polymers and others. In this work the effects of the rotational speed, the speed of travel and the axial force of the tool were grouped in a mathematical model to quantify their influences on the weld seam. In this context and with of the experimental tests, the desired objective through this study is to describe the tensile strength of the cord resulting from this welding operation, for the qualification of this type of parts with an optimum adapted to a given application.
Źródło:
Archives of Mechanical Technology and Materials; 2019, 39; 41-45
2450-9469
Pojawia się w:
Archives of Mechanical Technology and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and Mechanical Properties of as Cast Al-6.5Mg-1.5Zn-0.5Fe Alloy Followed by Cold Rolling and Subsequent Annealing
Autorzy:
Lee, Seong-Hee
Powiązania:
https://bibliotekanauki.pl/articles/356133.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
cold rolling
annealing
microstructure
mechanical properties
Opis:
Microstructures and mechanical properties of as-cast Al-6.5Mg-1.5Zn-0.5Fe alloys newly alloy-designed for the parts of automobile were investigated in detail. The aluminum (Al) sheets of 4 mm thickness, 30 mm width and 100 mm length were reduced to a thickness of 1 mm by multi-pass rolling at ambient temperature and subsequently annealed for 1h at 200~500°C. The as-cast Al sheet was deformed without a formation of so large cracks even at huge rolling reduction of 75%. The recrystallization begun to occur at 250°C, it finished at 350°C. The as-rolled material showed tensile strength of 430 MPa and tensile elongation of 4.7%, however the specimen after annealing at 500°C showed the strength of 305 MPa and the elongation of 32%. The fraction of high angle grain boundaries above 15 degree increased greatly after annealing at high temperatures. These characteristics of the specimens after annealing were discussed in detail.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 3; 875-878
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Intensive Cooling of Alloy AC-AlSi7Mg with Alloy Additions on Microstructure and Mechanical Properties
Autorzy:
Pisarek, B.
Rapiejko, C.
Pacyniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/356173.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solidification process
aluminum alloy
alloy additions
intensive cooling
mechanical properties
Opis:
The work presents results of the investigations of effect of intensive cooling of alloy AC-AlSi7Mg with alloy additions on microstructure and mechanical properties of the obtained casts. The experimental casts were made in ceramic molds preliminarily heated to 180°C, into which AC-AlSi7Mg with alloy additions was poured. Within implementation of the research, a comparison was made of the microstructure and mechanical properties of the casts obtained in ceramic molds cooled at ambient temperature and the ones intensively cooled in a cooling liquid. Kinetics and dynamics thermal effects recorded by the TDA method were compared. Metallographic tests were performed with the use of optical microscope and strength properties of the obtained casts were examined: UTS, Elongation and HB hardness.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 677-681
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and numerical analysis of aluminum alloy AW5005 behavior subjected to tension and perforation under dynamic loading
Autorzy:
Bendarma, A.
Jankowiak, T.
Łodygowski, T.
Rusinek, A.
Klósak, M.
Powiązania:
https://bibliotekanauki.pl/articles/280547.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
aluminum alloy
AW5005
ballistic behavior
failure criterion
Opis:
The paper describes mechanical behavior of aluminum alloy AW5005 (EN AW5005) under impact loading. The work is focused on tensile tests and the process of perforation of aluminum alloy AW5005 sheets. Experimental, analytical and numerical investigations are carried out to analyse in details the perforation process. Based on these approaches, ballistic properties of the structure impacted by a conical nose shape projectile are studied. Different failure criteria are discussed, coupling numerical and experimental analyses for a wide range of strain rates. Optimization method functions are used to identify the parameters of the failure criteria. Finally, good correlation is obtained between the numerical and experimental results for both tension and perforation tests.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1219-1233
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the thickness of Ni-P coating applied on 7075 aluminum alloy on its hardness
Autorzy:
Czapczyk, K.
Siwak, P.
Jabłoński, P.
Furmański, Ł.
Grobelny, P.
Legutko, S.
Powiązania:
https://bibliotekanauki.pl/articles/957945.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
aluminum alloy AW-7075
Ni-P coating
hardness
Opis:
The paper presents the results of hardness tests of aluminum alloy AW-7075 (for plastic processing) and Ni-P chemical coatings (nickel-phosphorus) which had been applied by the no-current method. Coatings of various thickness have been made and their influence on the increase of the top layer hardness has been determined, as well as the increase of the hardness of the coating and substrate system after puncturing the coating with an indenter. The purpose of the investigation was to determine the possibility of applying the Ni-P coating for selected technical applications, among others, by the selection of its optimum thickness on the hard aluminum alloy and by the determination of the deformation resistance of the top layer if the given coating.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 32; 53-58
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the homogenization temperature on the microstructure and properties of AlSi10CuNiMn alloy
Autorzy:
Cais, J.
Kraus, P.
Lysoňková, I.
Powiązania:
https://bibliotekanauki.pl/articles/102937.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
aluminum alloy
heat treatment
microstructure
intermetallic phase
microhardness
Opis:
The article examines the impact of changes in homogenization temperature in the hardening process on the microstructure of aluminum alloys. The research samples were cast from AlSi10CuNiMn alloy produced by gravity casting technology in metal mold. Subsequently, the castings were subjected to a heat treatment. In an experiment with changing temperature and staying time in the process of homogenization. The microstructure of the alloy was investigated by methods of light and electron microscopy. Examination of the microstructure has focused on changing the morphology of separated particles of eutectic silicon and intermetallic phases. The analysis of intermetallic phases was supplemented by an analysis of the chemical composition – EDS analysis. Effect of heat treatment on the properties investigated alloy was further complemented by Vickers microhardness. Investigated alloy is the result of longtime research conducted at the Faculty of Production Technology and Management.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 104-110
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and Evaluation of Effect of Manganese Content on Properties of EN AC 46000 Aluminum Alloy
Autorzy:
Pasternak, Martyna
Brzeziński, Marcin
Piwowarczyk, Gabriela
Powiązania:
https://bibliotekanauki.pl/articles/107001.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
aluminum alloy
pressure casting
manganese
strength of material
Opis:
This article is the effect of industrial work and many surveys in the one of the Polish foundries that specialize in aluminum alloys. The main goal of our explorations is to evaluate the influence of manganese on Al-Si alloy properties. In die-cast alloys, it is recommended to use larger amounts of iron to reduce the impact on the pressure chamber and mold. Manganese neutralizes the harmful effect of iron by changing the morphology of the separated brittle ferrous phases. The unfavorable form of the iron-containing phases in the form of long needles changes into the forms of fine compact crystals, which are less harmful to the mechanical properties. Nowadays, the main client requirement is to obtain the right parameters at the best price. Specifically, the customer is in the automotive industry, where new technologies provide a connection between the high quality and low weight of car parts [1–3].
Źródło:
Journal of Casting & Materials Engineering; 2019, 3, 1; 14-18
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Citric Acid as an Eco-Friendly Inhibitor for the EN AW-2024 Aluminum Alloy Corrosion in Acidic Medium
Autorzy:
Kamarska, Kalina
Powiązania:
https://bibliotekanauki.pl/articles/2202340.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
corrosion inhibition
aluminum alloy
citric acid
electrochemical technique
Opis:
The paper presents the results from a study on the possibility to use citric acid as an ecological inhibitor of corrosion in aluminum alloy EN AW-2024 in 0.5 М solution of H2SO4. The study has been carried out by using electrochemical techniques, such as open circuit potential and chronoamperometry. The results reveal that the presence of citric acid in the studied acid medium reduces the corrosion degree of the EN AW-2024 aluminum alloy. The inhibition efficiency increases together with increasing the concentration of the citric acid. The study shows that the citric acid can be used as an ecological inhibitor to fight corrosion in a solution of H2SO4.
Źródło:
Journal of Ecological Engineering; 2023, 24, 1; 307--311
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Warm Tensile Deformation Behavior and Constitutive Equation of Supersaturated Solid-Solutionized Al-9Mg Extruded Alloy
Autorzy:
Yang, Seung Y.
Kim, Bong H.
Lee, Da B.
Choi, Kweon H.
Kim, Nam S.
Ha, Seong H.
Yoon, Young O.
Lim, Hyun K.
Kim, Shae
Kim, Young J.
Powiązania:
https://bibliotekanauki.pl/articles/2048882.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
Al-9Mg alloy
tensile test
constitutive equation
Opis:
In this paper, as a purpose to apply the supersaturated solid-solutionized Al-9Mg alloy to the structural sheet parts of automotive, tensile tests were conducted under the various conditions and a constitutive equation was derived from the tensile test results. Al-9Mg alloy was produced using a special Mg master alloy containing Al2Ca during the casting process and extruded into the sheet. In order to study the deformation behavior of Al-9Mg alloy in warm temperature forming environments, tensile tests were conducted under the temperature of 373 K-573 K and the strain rate of 0.001/s~0.1/s. in addition, by using the raw data obtained from tensile tests, a constitutive equation of the Al-9Mg alloy was derived for predicting the optimized condition of the hot stamping process. Al-9Mg alloy showed uncommon deformation behavior at the 373 K and 473 K temperature conditions. The calculated curves from the constitutive equation well-matched with the measured curves from the experiments particularly under the low temperature and high strain rate conditions.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 4; 1013-1018
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Different Conditions on the Tensile Properties of AA7075-T6 During the Friction Stir Welding Process
Autorzy:
Sharma, Akash
Dwivedi, Vijay Kumar
Singh, Yesh Pal
Powiązania:
https://bibliotekanauki.pl/articles/28099543.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
tensile strength
aluminum alloy 7075
Taguchi Technique
microstructure
FSW
Opis:
In this paper the investigation of the FSW result characteristics on AA7075-T6 of the highest grade is carried out using different process parameters. A vertical milling machine with different FSW tool geometry is used to weld AA7075. When the tool rotational speed varies from 1200 and 1800 (rpm), different welding parameters are studied, the plunge depth of tool is between 0.14 and 0.20 mm, the table transverse speed range is between 20 and 50 (mm/min) and the tool shoulder diameter was 20 mm. The welding settings are optimized using the Taguchi approach. In this experimental investigation Taguchi Technique is utilized in this study to optimize three factorial and three level designs. The results show that when the rotating speed increases, the UTS of the welded joint increases, whereas the tensile strength of the welded joint decreases resulting to frictional heat created during the FSW process. Tensile strength decreases as feed increases and increases as rotational speed increases. For a 5 mm thick plate, tensile strength is optimal with a tool shoulder diameter of 20 mm, a rotational speed of 1600 rpm, feed rate of 30 mm/min and plunge depth. The shoulder diameter of 20 mm provides the maximum ultimate tensile strength when it is compared with all other tool shoulder diameter. The Al alloy AA7075-T6 plates, however, concurrently developed an equiaxial grain structure with a substantially smaller grain size and coarsened the precipitates.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 813--821
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of residual stress distribution in high strength aluminum alloy after EDM
Autorzy:
Mehmood, S.
Sultan, A.
Anjum, N. A.
Anwar, W.
Butt, Z.
Powiązania:
https://bibliotekanauki.pl/articles/103214.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
electric discharge machining
residual stresses
discharge current
aluminum alloy
Opis:
Thermal energy produced by discrete and random electric sparks in electric discharge machining (EDM) melts surface material. A portion of this molten material is removed and the remaining material resolidified by rapid cooling in a hydrocarbon oil. The effect of repeated heating and cooling of the surface and sub surface material with complex temperature gradients results in residual stresses in machined parts. The aim of this investigation is to determine the distribution of residual stresses in the depth of machined material with respect to discharge current, most important electric parameter during EDM. It is well known that surface finish is dependent on discharge current. Therefore, investigations were carried out for smaller discharge current levels i.e. 3, 6, 9, 12 ampere. Hole-drill strain gauge method is used for the determination of residual stresses in the depth of material. For comparison purposes, residual stresses are also determined for conventionally turned specimens. This study provided quantitative analysis of the residual stresses for various discharge current in EDM which is a key parameter in deciding the service life of material.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 29-35
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of stress and strain state of aluminum alloys during a hot extrusion and patterns of structure and feature formation
Autorzy:
Aghbalyan, Suren G.
Bagdasaryan, Vazgen
Vasilyan, Gayane A.
Wyczółkowski, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/36074875.pdf
Data publikacji:
2024
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
casting
aluminum alloy
hot extrusion
slip
stress
matrix
pressure
Opis:
This paper investigates the stress and strain state as well as formation processes of structure and features of aluminum alloys during the hot extrusion. It has been shown that during the hot extrusion the ring layers of an extruded element experience not only longitudinal and transverse deformations, but also a slip. The slip increases from inner layers to the surface layer. The tensile principal stresses and the sum of slip deformations also increase. It has been also demonstrated that at the exit of the pressing part the tensile principal stresses have different directions, forming an angle with extruder axis, which also increases towards the surface. In conclusion, it has been stated that the main radial and circumferential deformations act as restraining deformations.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2024, 33, 1; 3-16
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selection of basic position in Refill Friction Stir Spot Welding of 2024-T3 and D16UTW aluminum alloy sheets
Autorzy:
Lacki, P.
Derlatka, A.
Gałaczyński, T.
Powiązania:
https://bibliotekanauki.pl/articles/351991.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Refill Friction Stir Spot Welding
RFSSW
aluminum alloy
basic position
Opis:
One of the important parameters of Refill Friction Stir Spot Welding is the so-called basic position of the tool. This is the arrangement of the pin and sleeve which occurs when the tool is plunged into the material. The basic positions can be divided into two categories. In the first category, the sleeve and the pin are above the sheet surface or below sheet surface and in the second category the pin is retracted within the sleeve or protrudes from it. The aim of the work was to test four settings of the basic position, and then determine the best setting of the basic position, without changing the other welding parameters. Joints made of an aluminum alloy 2024-T3 sheet having a thickness of 1.0 mm and an aluminum alloy D16UTW sheet having a thickness of 0.6 mm were analysed. The best setting of the basic position was determined based on assessment of the force carried in shear test, macrostructure and weld face of the joints.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 1; 443-449
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and Evaluation of AA6061/AA5052/AA6061/AA5052 Multi-Layer Complex Sheet by Cold-Roll Bonding Process
Autorzy:
Lee, Seong-Hee
Powiązania:
https://bibliotekanauki.pl/articles/353230.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
cold roll-bonding
aging treatment
mechanical properties
microstructure
Opis:
A cold roll bonding process is applied to fabricate an AA6061/AA5052/AA6061/AA5052multi-layer sheet. Two AA6061 and two AA5052 sheets with 2mm thickness are stacked alternately to each other, and reduced to a thickness of 2 mm by multi-pass cold rolling. The roll bonded multi-layer sheet is then hardened by natural aging (T4) and artificial aging (T6) treatments. The as roll-bonded sheet shows a typical deformation structure that the grains are elongated to the rolling direction. However, after T4 and T6 aging treatments, it has a recrystallization structure consisting of the coarse equiaxed grains in both AA5052 and AA6061 sheets. The as rolled material shows a lamella structure in which AA5052 and AA6061 sheets are stacked alternately to each other, having higher hardness in AA5052 than in AA6061. However, T4 and T6 aging treated materials show a different lamella structurein which the hardness of the AA6061 layers is higher than that of the AA5052 layers. The strengths of the T4 and T6 age-treated specimens are found to increase by 1.3 and 1.5 times respectively, compared to that of the starting material.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 3; 1093-1097
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experiments and numerical simulations of Lueders bands and Portevin–Le Chatelier effect in aluminium alloy AW5083
Autorzy:
Mucha, M.
Rose, L.
Wcisło, B.
Menzel, A.
Pamin, J.
Powiązania:
https://bibliotekanauki.pl/articles/38697098.pdf
Data publikacji:
2023
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
Lueders bands
PLC effect
aluminum alloy
large strains
thermo-viscoplasticity
Opis:
This work is focused on the modelling of experimental behaviour of a bone-shape sample made of aluminium alloy AW5083 under tension. This behaviour involves propagating instabilities, namely Lueders bands and the Portevin–Le Chatelier effect. A series of experiments was performed at room temperature for three loading rates, showing the instabilities and failure. In the paper a large strain thermovisco-plasticity model is proposed and used for finite element simulations. This model contains initial softening and a hardening function based on the Estrin–McCormick concept to represent serrations and travelling shear bands. The issues of instability sources and regularisation are considered. The predictive capabilities of the model are examined. The proposed models are able to reproduce both Lueders bands and the PLC effect. Simulation results show good agreement with experiments regarding force–displacement diagrams and temperature levels.
Źródło:
Archives of Mechanics; 2023, 75, 3; 301-336
0373-2029
Pojawia się w:
Archives of Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of multilayer coating of EN AW 6060 – T66 using friction surfacing
Autorzy:
Krall, Stephan
Baumann, Christian
Agiwal, Hemant
Bleicher, Friedrich
Pfefferkorn, Frank
Powiązania:
https://bibliotekanauki.pl/articles/2142351.pdf
Data publikacji:
2022
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
friction surfacing
aluminum-silicon alloy
coating
Opis:
The objective of this research is to investigate observable process changes during multi-layer friction surfacing of EN AW 6060 aluminum, whether for repair, remanufacturing, or new part manufacturing. In this study, friction surfacing was performed with a 10-mm-diameter rod of EN AW 6060 aluminum at spindle speeds ranging from 1000 to 7000 rpm to create up to three layers of 40-mm-long deposits on a substrate of the same alloy. The process forces and layer temperatures were observed. Post-process measurement of flash geometry, layer geometry and microhardness were conducted with the motivation to understand the impact of multi-layer depositions on performance and identifying acceptable conditions required to achieve acceptable build quality. The thickness, deposition and joining efficiency of layers in the multilayer configuration remained consistent. Friction surfacing of EN AW 6060 aluminum allowed for high deposition rates of 9 kg/hr, when compared to other metal additive technologies.
Źródło:
Journal of Machine Engineering; 2022, 22, 3; 44--58
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of T6 Treatment Parameters of AlZn10Si7MgCu Alloy on Change of its Hardness and Impact Strength
Autorzy:
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/380270.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
ATD method
alloy hardness
stop aluminium
metoda ATD
twardość stopu
Opis:
Among alloys of non-ferrous metals, aluminum alloys have found the widest application in foundry industry as a competitive alternative of ferroalloys. One from methods to improve mechanical properties of aluminum alloys is a heat treatment consisting in heating a material to solutioning temperature, keeping the material in such temperature, and subsequent rapid cooling and natural or artificial ageing. In the paper are presented test results concerning effects of the T6 heat treatment, comprising solutioning and artificial ageing, on hardness and impact strength of the AlZn10Si7MgCu alloy poured into metal moulds. Temperature ranges of solutioning and ageing treatments were selected on the base of recorded curves from the ATD method. Basing on three-stage plan of the investigations with four variables one determined range of the heat treatment parameters, what is a condition of obtainment of required HB hardness of the investigated alloy. Further investigations shall concern correction of obtained results with respect to the HB hardness and impact strength, obtained for selected castings of machinery components.
Źródło:
Archives of Foundry Engineering; 2013, 13, 1 spec.; 143-146
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Process Parameters on Microstructure and Mechanical Properties of RFSSW Lap Joints of Thin Al7075-T6 Sheets
Autorzy:
Andres, J.
Wrońska, A.
Gałaczyński, T.
Luty, G.
Burek, R.
Powiązania:
https://bibliotekanauki.pl/articles/353978.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
refill friction stir welding
lap joining
aerostructures
aluminum alloy
alclad
Opis:
Refill friction stir spot welding (RFSSW) is a new technique of metal structures joining. Within the framework of activities of PZL Mielec in R&D area (program Innolot) researches are realized which aim is to develop the RFSSW technology as a method of joining thin aluminum elements used in aircrafts constructions. The paper presents results of investigations on the RFSSW lap joints welded using rotations in the range from 1500 to 2000 rpm and tool sleeve plunge depth from 1.6 to 1.8 mm. Thin aluminum sheets of thickness 0.8 and 1.6 mm coated with alclad or anodized were welded. Results of the investigations prove that the most common cause of specimens breaking was presence of geometrical defect – the so called hook and weak bonding between parent material and working area of internal sleeve of RFSSW tool. The best tensile strength was reached in case of joint welded at rotational speed 2000 rpm and tool plunge depth 1.6 mm and 1.7 mm (5.37 kN and 5.87 kN adequately). These joints were characterized by very fine and uniform microstructure in the area between sleeve stirred zone and parent material.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 39-43
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deterministic Approach to Predicting the Fatigue Crack Growth in the 2024-T3 Aluminum Alloy Under Variable Amplitude Loading
Autorzy:
Kocańda, D.
Torzewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/97779.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
aluminum alloy
fatigue crack growth rate
microfractographic analysis
Willenborg retardation model
Opis:
The paper presents the attempt to predict fatigue crack growth rate in a component subjected to variable amplitude loading containing overload-underload cycles. For this goal in a deterministic approach the modified Willenborg retardation model was applied. To provide experimental data the research into fatigue crack growth for 2024-T3 aluminum alloy sheet CCT specimens under LHL type block program loading with multiple overload-underload cycles was developed. The microfractographic analysis of fatigue fractures with the use of the transmission electron microscope (TEM) made it possible to trace the effect of block program loading on the crack growth rate. The knowledge of the affection of a particular overloadunderload cycle or a block of these cycles on crack rate on the basis of microfractographic analysis was utilized for assessing the equivalent loading for the LHL block program. The diagrams that presented the crack growth rate both on the surface and inside the aluminum alloy sheet was performed. The crack growth rate inside the sheet was estimated on the basis of the striation spacing analysis.
Źródło:
Fatigue of Aircraft Structures; 2009, 1; 102-115
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Brushing on Residual Stress and Surface Roughness of EN AW-2024-T3 Aluminum Alloy Joints Welded Using the FSW Method
Autorzy:
Bucior, Magdalena
Kluz, Rafał
Kubit, Andrzej
Ochał, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/2201870.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
brushing
aluminum alloy
friction stir welding
FSW
surface roughness
residual stress
Opis:
This article presents the influence of the brushing process on residual stress and surface roughness of EN AW-2024-T3 aluminum alloy joints welded using the Friction Stir Welding (FSW) method. Butt joints with thicknesses of 2 mm were brushing with using ceramic brush. The aim of the study was to find optimal parameters of the brushing process, which would significantly improve the functional properties of welded joints. The experiments were carried out in two steps. In the first stage of the research, the feed rate was changed in the range f = 40 ÷ 120 mm / min with a constant brushing depth d = 0.5 mm. The roughness decreased from Sa = 5.285 µm for the specimen after welding to Sa = 2.460 µm for the f = 120 mm/min and d = 0.5 mm. The change in the parameters of the brushing process did not have a significant impact on the state of residual stresses. Hence, in the second step, the brushing depth was increased in steps of 0.1 mm. The best properties were obtained for f = 120 mm / min and d = 0.6 mm (variant 6A), where roughness was Sa = 0.443 µm and compressive stresses σ = -118 MPa.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 1; 86--93
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of aluminum alloys surface treatment on the durability of glued joints
Wpływ obróbki powierzchni stopów aluminium na trwałość klejonych połączeń
Autorzy:
Kowalik, Joanna
Tworek, Magdalena
Smaruj, Michał
Powiązania:
https://bibliotekanauki.pl/articles/24202770.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
aluminum
aluminum alloy
surface treatment
surface roughness
aluminium
stopy aluminium
obróbka powierzchni
chropowatość powierzchni
Opis:
The aim of the work was to analyze the method of preparing the aluminum surface in terms of the functional properties of glued joints with the use of one-component polyurethane adhesive. Six methods of surface treatment of EN AW-5251 aluminum alloy were tested. In addition, changes in the shear strength of adhesive joints after environmental exposure were determined. The best surface preparation processes were atmospheric plasma and anodizing.
Celem pracy była analiza sposobu przygotowania powierzchni aluminium pod kątem właściwości użytkowych połączeń klejonych z zastosowaniem jednoskładnikowego kleju poliuretanowego. Zbadano sześć metod obróbki powierzchni stopu aluminium EN AW-5251. Ponadto określono zmiany wytrzymałości połączeń klejonych na ścinanie po ekspozycji środowiskowej. Najlepszym sposobem przygotowania powierzchni była plazma atmosferyczna i anodowanie.
Źródło:
Polimery; 2023, 68, 10; 523--529
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Properties of EN AC 51200 Aluminum Alloy
Autorzy:
Uhríčik, M.
Palček, P.
Chalupová, M.
Hanusová, P.
Kuchariková, L.
Powiązania:
https://bibliotekanauki.pl/articles/356674.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
Al-Mg cast alloy
three-point bending loading
fatigue
fracture surface
Opis:
The article will be focused on analysis of properties of aluminum alloy for the casting of type Al-Mg. As an experimental material was used aluminum alloy EN AC 51200, supplied in a cast state without a heat treatment. It was produced by the continuous casting method. Experiments deal with microstructural material analysis, fractographic analysis, mechanical and fatigue tests. The microstructure of the testing sample was examined using an optical microscope Neophot 32. Fatigue properties of aluminum alloy was tested by three-point bending cyclic loading. The fracture surface of the testing sample was examined using scanning electron microscopy (SEM), where sample was observed on various stages of the fatigue process, its characteristics and differences of fracture surfaces.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1437-1445
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Analysis of FSW Process Forces
Autorzy:
Balawender, Tadeusz
Myśliwiec, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/176207.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
friction stir welding
aluminum alloy 2024
magnesium alloy AZ31
force measurement
welding force
Opis:
This paper presents the results of research work on linear friction stir welding (FSW) of magnesium AZ31 and aluminum 2024 alloys. During the FSW process, forces exerted by a tool on joined materials were measured. The measurements of forces were taken in three directions, vertical (Z axis) and horizontal (X and Y axes) directions, using high-sensitive piezoelectric dynamometer. The force analysis was done for three stages of welding process: plunging, dwelling, and welding. Conclusions regarding the force reaction of materials to be welded were formulated. It was found that the first two stages of the process, plunging and dwelling, are very important for the correct welding. In the plunging stage, a tool exerts the greatest forces and unit pressures (at the Z direction) on joined materials; during the dwelling stage, thermal conditions of the process are established. The welding stage was divided into two substages: the initial unstable and the subsequent long-term stabilized one.
Źródło:
Advances in Manufacturing Science and Technology; 2020, 44, 2; 51-56
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Backward Extrusion of Aluminum Alloy Sections Used in Aircraft Structural Components
Wyciskanie przeciwbieżne kształtowników ze stopów aluminium stosowanych na elementy konstrukcji lotniczych
Autorzy:
Pawłowska, B.
Śliwa, R. E.
Powiązania:
https://bibliotekanauki.pl/articles/354092.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
backward extrusion
aluminum alloys
aluminum alloy 7075
aluminium alloy 2024
aluminium alloy 2099
section
wyciskanie przeciwbieżne
stopy aluminium
konstrukcje lotnicze
Opis:
The paper presents an analysis of selected aluminum alloys as structural materials used in production of aircraft parts as well as specification of technological parameters of Al alloys extrusion on a backward press with their effect on mechanical properties, microstructure and quality of the final product. Upsetting tests with backward extrusion complex cross-sectional profile tests were conducted on aluminum alloys 7075, 2024, 2099. Based on the results, specifications of forging in the form of unit stress - effective strain relations were determined using logarithmic deformation index, allowing proper choice of extrusion parameters. The range of temperatures for hot plastic treatment along with range of extrusion rate for the analyzed thin-walled aircraft profiles were determined. Tests were also conducted on the microstructure of Al alloys in the initial state as well as after the extrusion process had been completed. It has been proved that the proper choice of parameters in the case of a specific profile extruded from Aluminum alloys 2024, 7075, 2099, allows the manufacturing of products of complex crosssections and the quality required in aerospace industry. This has been demonstrated on the example of complex cross-sectional profiles using elements of varied wall thickness.
W pracy przedstawiono analizę wybranych stopów aluminium jako materiałów konstrukcyjnych z przeznaczeniem na elementy obiektów latających wraz z określeniem technologicznych parametrów wyciskania tych stopów na prasie przeciwbieżnej oraz ich wpływu na właściwości mechaniczne, mikrostrukturę i jakość finalnego wyrobu. Przedstawiono wyniki testów spęczania i wyciskania przeciwbieżnego profili o złożonym kształcie przekroju poprzecznego z wykorzystaniem stopów aluminium 7075, 2024, 2099. W oparciu o uzyskane wyniki wyznaczono charakterystyki spęczania jako wykresy zależności średnich nacisków jednostkowych od logarytmicznego wskaźnika odkształcenia, umożliwiające adekwatny dobór parametrów wyciskania. Określono przedział optymalnych temperatur przeróbki plastycznej na gorąco i prędkości wyciskania dla analizowanych cienkościennych profili lotniczych. Wykonano również badania mikrostruktury stopów Al w stanie wyjściowym i po wyciskaniu. Wykazano, że adekwatny dobór parametrów procesu do danego typu profilu wyciskanego ze stopów 2024, 7075, 2099, pozwala na uzyskanie wyrobów o złożonym kształcie przekroju poprzecznego i o wymaganych własnościach oraz wysokiej jakości pożądanej w lotnictwie, co pokazano na przykładzie profili o złożonym kształcie przekroju poprzecznego z elementami o zróżnicowanej grubości ścianki.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 4; 2805-2812
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Modelling of the Production of an Alloy Vapour Source for the Synthesis of Dielectric Material
Autorzy:
Nadolski, M.
Stradomski, G.
Zdunek, K.
Okrasa, S.
Powiązania:
https://bibliotekanauki.pl/articles/355587.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum-silicon alloy
magnetron sputtering processes
gravity casting
die casting
Opis:
The paper reports the results of a physical modelling study of the production of a hypereutectic aluminium alloy to be used formaking an alloy vapour source for operation in the magnetron. Within the study, targets from a hypereutectic aluminium-silicon alloy were made in laboratory conditions. Thus obtained material was subjected to heat treatment, porosity analysis, and the assessment of the microstructure and fitness for being used in the magnetron. The process of melting the hypereutectic Al-Si alloy was carried out at the Department of Foundry of the Czestochowa University of Technology. The investigation into the production of the alloy vapour source for the synthesis of the dielectric material from the hypereutectic aluminium alloy has confirmed.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 201-206
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deposition and Analysis of DLC Thin Films Obtained on 7075 Aluminum Alloy
Autorzy:
Kuffova, M.
Marton, M.
Kottfer, D.
Rehak, F.
Powiązania:
https://bibliotekanauki.pl/articles/403871.pdf
Data publikacji:
2017
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
a-C:H film
CN film
hardness
Young's modulus
7075 aluminum alloy
Opis:
In this study a-C:H (hydrogenated amorphous carbon) thin films were deposited on the 7075 Al alloy without and with admixture gas (N2) using a DC CVD (direct current chemical vapor deposition) method. The structural and mechanical properties were analyzed using Raman spectroscopy, SEM and nanoindentation. We obtained hardness of a-C:H thin film without and with N2 equal to 27.3 GPa and 21.4 GPa, respectively. Values of the Young’s modulus were equal to 135.5 GPa and 205.2 GPa, respectively.
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2017, 8, 3 (29); 33-42
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Chip Breakability Index During Longitudinal Turning of Cast and DMLS Additively Manufactured AlSi10Mg Aluminum Alloy
Autorzy:
Struzikiewicz, Grzegorz
Słodki, Bogdan
Zębala, Wojciech
Franczyk, Emilia
Powiązania:
https://bibliotekanauki.pl/articles/2022248.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
machining
turning
AlSi10Mg aluminum alloy
additive manufacturing
DMLS
chip breakability
Opis:
The article presents selected issues related to the process of turning samples made of the AlSi10Mg alloy with the use of various manufacturing technologies, i.e. casting and DMLS (Direct Metal Laser Sintering). Machining processes of cylindrical surfaces of samples made with these two methods were subjected to a comparative analysis. The main idea behind the research was to develop guidelines for turning parts obtained using laser powder sintering. Study on the influence of cutting parameters on the value of breakability index Cin. as well as the type, shape and form of chips produced during longitudinal turning is presented. The chips were also measured and the results of the microscopic analysis of the chips form are described. Results showed that the values of Cin index for turning of the cast AlSi10MG alloy depend mainly on the value of feed f. According to adopted chip classification for the feed value of f > 0.1 mm/rev the chips had a favorable, short form. In the case of turning the sample obtained by the DMLS method, the values of the chip breakability index Cin are not significantly dependent on the adopted ranges of cutting parameters. The Taguchi method was used to develop the conclusions obtained on the basis of the research results.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 1; 28-35
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zgrzewanie tarciowe kompozytów Al/Al2O3 ze stopami Al 44200
Joining Al/Al2O3 composites and 44200 aluminium alloys by friction welding technique
Autorzy:
Siedlec, R.
Strąk, C.
Powiązania:
https://bibliotekanauki.pl/articles/192212.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Materiałów Elektronicznych
Tematy:
zgrzewanie tarciowe
kompozyt
ceramika
stop Al
friction welding
composite
ceramic
aluminum alloy
Opis:
Zgrzewanie tarciowe to jedna z bardziej ekonomicznych metod trwałego łączenia materiałów w stanie stałym. Metoda ta umożliwia wykonywanie złączy zarówno jednoimiennych, jak i różnoimiennych w bardzo krótkim czasie. Zaletą zgrzewania tarciowego jest możliwość uzyskania złączy o wysokiej jakości. Zgrzewanie tarciowe kompozytów z metalami, stwarza nowe możliwości aplikacji z uwagi na fakt, że oba materiały posiadają różne właściwości fizyczne oraz mechaniczne. W pracy przeprowadzono próby spajania stopu aluminium 44200 (wg normy PN-EN 1706:2001) z kompozytami Al/Al2O3. W pracy przeprowadzono następujące badania złączy stop aluminium-kompozyt uzyskanych metodą zgrzewania tarciowego: mikroskopowe, twardości, mechaniczne (pomiar wytrzymałości na rozciąganie). Wykonane badania miały na celu ocenę jakości połączenia pomiędzy stopem 44200, a kompozytami na osnowie stopu aluminium wzmacnianymi fazą ceramiczną Al/Al2O3.
Friction welding is one of the most economical processes for durable joining of solid-state materials. This technique allows bonding similar and dissimilar materials in a very short time. Friction welding of metals and composites opens up new application opportunities due to the fact that these materials have different physical and mechanical properties. In the present study, 44200 aluminum alloy was friction welded to Al/Al2O3 composite. In addition, the following analyses were performed for all joints produced by friction welding: optical microscopy, microhardness measurements and tensile strength measurements. All studies were carried out to evaluate the quality of bonding between aluminum alloy and metal matrix composites reinforced with a ceramic phase of Al/Al2O3.
Źródło:
Materiały Elektroniczne; 2014, T. 42, nr 3, 3; 11-19
0209-0058
Pojawia się w:
Materiały Elektroniczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-isothermal annealing of AA7075 aluminum alloy - structural and mechanical effects
Nieizotermiczne wyżarzanie stopu aluminium AA7075 - efekty strukturalne i mechaniczne
Autorzy:
Pieła, K.
Błaż, L.
Sierpiński, Z.
Foryś, T.
Powiązania:
https://bibliotekanauki.pl/articles/354234.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nieizotermiczne wyżarzanie
stopy aluminium
wytrzymałość cieplna
aluminum alloy
annealing
thermal treatment
structure
Opis:
Calorimetric and dilatometric tests were performed on AA7075 aluminum alloy annealed at constant heating rate of 15 degree Celsjus/min in temperature range 20-470 degree Celsjus and discussed in relation to the hardness test and structure observation results. The samples were machined from furnace cooled material (FC), furnace cooled and deformed (FCD) material, solution treated (ST) material and solution treated and deformed (STD) material. It was found that the nucleation and growth of transition η and stable η (MgZn2) phases caused remarkable reduction of thermal expansion coefficient αt , whereas both the dissolution of phase and formation of GP zones were accompanied by an increase of αt value. While η phase started to dissolve at 250 degree Celsjus, a widespread endothermic effect was observed on DSC curves. Dissolution of η particles at high annealing temperatures was accompanied by the solid solution hardening of the alloy. Mentioned hardening process was overlapped by expected material softening that was ascribed to recovery and recrystallization processes. Because of superposition the solution hardening and recrystallization softening, recrystallization temperature could not be precisely defined on the basis of simple hardness measurements.
W pracy przedstawiono wyniki badań kalorymetrycznych, dylatometrycznych i pomiarów twardości stopu aluminium AA7075 poddanego nieizotermicznemu wyżarzaniu (nagrzewaniu ze stała prędkością) w zakresie temperatur 20-470 stopni Celsjusza. Badania objęły cztery stany metalurgiczne materiału: wolno studzony z piecem (FC), wolno studzony z piecem i odkształcony (FCD), przesycony (ST) oraz przesycony i odkształcony (STD). Stwierdzono, ze wydzielanie fazy pośredniej η' i równowagowej η(MgZn2) powoduje wyraźne obniżenie współczynnika rozszerzalności cieplnej αt , natomiast zarówno rozpuszczanie fazy η, jak i formowanie stref GP prowadzi do jego wzrostu. Rozpuszczanie fazy η rozpoczyna sie w temperaturze 250 stopni Celsjusza i towarzyszy mu rozległy efekt endotermiczny, a w zaawansowanym stadium rozpuszczania η także wzrost twardości przesycanych próbek, będący rezultatem umocnienia roztworowego stopu. Umocnienie roztworowe zakłóca tym samym efekt oczekiwanego mięknięcia materiału wskutek rekrystalizacji, co w konsekwencji utrudnia dokładna ocenę temperaturowego zakresu rekrystalizacji w oparciu o pomiary twardości.
Źródło:
Archives of Metallurgy and Materials; 2012, 57, 3; 703-709
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Quality of EN AC-43300 Alloy with Use of ATND Method
Autorzy:
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/381845.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
ATND method
mechanical properties
stop aluminium
metoda ATND
właściwości mechaniczne
Opis:
Application of the silumins expands together with nowadays tendency to reduction of design structures mass. Technological and mechanical properties of Al-Si casting alloys depend mainly from structure of eutectic mixture, which is modified in result of introduction of micro alloying elements to liquid alloy, and that is why proper use of knowledge on crystallization to control of crystallization kinetics of produced alloys to optimize obtained structure is a significant factor leading to improvement of quality of the castings. In the paper one depicts use of the ATND method (thermal-voltage-derivative analysis) and regression analysis to assessment of quality of the EN AC-43300 alloy modified with strontium on stage of its preparation, in aspect of obtained mechanical properties (R0,02, R0,2, Rm, A5). Obtained dependencies enable prediction of mechanical properties of the investigated alloy, basing on values of characteristic points from the ATND method.
Źródło:
Archives of Foundry Engineering; 2013, 13, 1 spec.; 139-142
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metodyka badań zmęczeniowych z wykorzystaniem minipróbek - stanowisko, próbki, obciążenia i weryfikacja dla stopu EN AW-6063
Methods of fatigue tests using mini-specimens - testing machine, specimens, load and verification for EN AW-6063 aluminum alloy
Autorzy:
Tomaszewski, T.
Sempruch, J.
Powiązania:
https://bibliotekanauki.pl/articles/2072461.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
minipróbka
stop aluminium
zmęczenie wysokocyklowe
mini specimen
aluminum alloy
high-cycle fatigue
Opis:
Weryfikacja własności cyklicznych materiału w wielu przypadkach jest to niemożliwa z uwagi na ograniczenia wymiarowe badanych obiektów. Wówczas jednym z rozwiązań jest prowadzenie badań wykorzystujących próbkę mniejszą. W pracy przedstawiono badania porównawcze próbek normatywnych i minipróbek. Nieznacznie większy rozrzut wyników dla minipróbki w stosunku do próbki normatywnej sugeruje wiarygodność proponowanej metodyki.
Verification of material cyclic properties is not possible in many cases due to size limitations of tested objects. One possible solution is to conduct tests which would consider the smaller specimens. This paper presents a comparative study of normative and mini-specimens. Slightly higher spread of results obtained for mini-specimens compared to normative specimens suggests reliability of proposed methodology.
Źródło:
Inżynieria i Aparatura Chemiczna; 2013, 2; 120-121
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Change In Microstructure and Mechanical Properties Of Four-Layer Stack ARB Processed Complex Aluminum Sheet with Annealing
Autorzy:
Jo, Sang-Hyeon
Lee, Seong-Hee
Powiązania:
https://bibliotekanauki.pl/articles/2049296.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
accumulative roll bonding
heterogeneous microstructure
aluminum alloy
electron back scatter diffraction
annealing
Opis:
The four-layer stack accumulative roll bonding (ARB) process using AA1050, AA5052 and AA6061 alloy sheets is performed up to 2 cycles without a lubricant at room temperature. The sample fabricated by the ARB is a multi-layer complex aluminum alloy sheet in which the AA1050, AA5052 and AA6061 alloys are alternately stacked to each other. The changes of microstructure and mechanical properties with annealing for the-ARBed aluminum sheet are investigated in detail. The as-ARBed sheet shows an ultrafine grained structure, however the grain diameter is some different depending on the kind of aluminum alloys. The complex aluminum alloy still shows ultrafine structure up to annealing temperature of 250℃, but above 275℃ it exhibits a heterogeneous structure containing both the ultrafine grains and the coarse grains due to an occurrence of discontinuous recrystallization. This change in microstructure with annealing also has an effect on the change of the mechanical properties of the sample. Especially, the specimen annealed at 300℃ represents abnormal values for the strength coefficient K and work hardening exponent n value.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 765-770
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics and Tensile-Shear Properties of Refill FSSW Joint Under Different Plunge Depths in 2060 Aluminum Alloy
Autorzy:
Wang, Yue
Chai, Peng
Powiązania:
https://bibliotekanauki.pl/articles/2049695.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
refill friction stir spot welding
aluminum alloy
defect characteristics
tensile shear properties
Opis:
Refill friction stir spot welding (refill FSSW) was used to weld 3.2-mm-thick 2060 aluminum alloy. Joint formation, defect characteristics and tensile-shear property were analyzed. Results show that keyhole can be completely eliminated under different plunge depths. However, defects such as void, unconnected welding, hook can be observed under the plunge depths of 3.4-4 mm.The size of the overall void initially increased and then decreased with the increase of the plunge depth, while the void was the smallest under the plunge depth of 3.4 mm. The unconnected defect at the lap interface gradually shrank a welding line from obvious crack. Different hook morphologies were observed under different plunge depths. The tensile-shear load of joint increased with the increase of the plunge depth and was up to the largest under the plunge depth of 4 mm. All the tensile-shear specimens fractured along the lap interface. Compared with the void, the unconnected defect had a greater influence on the tensile-shear property.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 2; 451-460
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thin Wall Ductile Iron Castings as Substitutes for Aluminium Alloy Castings
Cienkościenne odlewy z żeliwa sferoidalnego jako substytuty odlewów ze stopów aluminium
Autorzy:
Fraś, E.
Górny, M.
Lopez, H.
Powiązania:
https://bibliotekanauki.pl/articles/353116.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thin wall
ductile iron
aluminum alloy
odlewy cienkościenne
odlewy żeliwne
stopy aluminium
Opis:
The paper discusses the reasons behind current trends for substituting cast iron castings by aluminum alloys. In particular it is shown that it is possible to produce thin wall castings (control arms, cantilevers and rotors) made of ductile iron without the development of chills, cold laps or misruns, and with a strength to weight ratio of up 87 MPa cm3/g. In addition, austenitizing at 900 °C for 20 minutes and then austempering in a salt bath at 350 °C for 15 minutes promotes the development of a fully ausferritic matrix in thin wall castings with a the strength to weight ratio increase of up to 154 MPa cm3/g. Finally, it is shown that thin wall castings made of ductile or austemperded cast iron can be lighter and with superior mechanical properties then their substitutes made of aluminum alloy.
W pracy omówiono przyczyny aktualnego trendu zastępowania odlewów z żeliwa przez odlewy ze stopów aluminium. W szczególności wykazano, że możliwe jest wytworzenie odlewów cienkościennych (wahacze, wsporniki, wirniki), wykonanych z żeliwa sferoidalnego bez zabieleń, niedolewów i niespawów oraz posiadających wskaźnik wytrzymałości (stosunek wytrzymałości do gęstości) wynoszący do 87 MPa cm3/g. Ponadto zastosowanie obróbki cieplnej polegającej na austenityzacji w temperaturze 900°C przez 20 minut oraz hartowaniu izotermicznemu w kąpieli solnej w temperaturze 350°C przez 15 minut powoduje otrzymanie osnowy austerrytycznej w odlewach cienkościennych, co zwiększa wskaźnik wytrzymałości do 154 MPa cm3/g. Z przeprowadzonych badań wynika, że odlewy z żeliwa sferoidalnego mogą być lżejsze od ich substytutów ze stopów aluminium, a przy tym charakteryzować się podobnymi lub lepszymi właściwościami mechanicznymi.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 2; 459-465
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Variation of Precipitated Phase Investigated with the Usage of Nonlinear Ultrasonic Technique
Autorzy:
You, Jun
Wu, Yunxin
Gong, Hai
Powiązania:
https://bibliotekanauki.pl/articles/2097705.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
nonlinear ultrasound
Al-Cu precipitation
2219-T6 aluminum alloy
precipitates phase
Opis:
It is well known that nonlinear ultrasound is sensitive to some microstructural characteristics in material. This paper investigates the dependence of the nonlinear ultrasonic characteristic on Al-Cu precipitation in heat-treated 2219-T6 aluminum alloy specimens. The specimens were heat-treated at a constant temperature 155℃ for different exposure times up to 1800 min. The nonlinearity parameter and the changes of precipitates phase were measured for each of the artificially aged specimens. The experimental results show fluctuations in the fractional change in nonlinear parameter (Δβ/β0) and the changes of precipitated phase over the aging time, but with an interesting correlation between the fractional change in nonlinear parameter (Δβ/β0) and the change of precipitate phase over the aging time. Through the experimental data results, the fractional change in nonlinear parameter (Δβ/β0) and the change of precipitate phase over the aging time were fitted curve. Microstructural observations confirmed that those fluctuations are due to the formation and evolution of precipitates that occur in a unique precipitation sequence in this alloy. These results suggest that the nonlinear ultrasonic measurement can be useful for monitoring second phase precipitation in the 2219-T6 aluminum alloy.
Źródło:
Archives of Acoustics; 2021, 46, 4; 605-610
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości plastyczne półwyrobów ze stopów aluminium wykonanych metodami duSych odkształceń plastycznych
Plastic properties of aluminium alloy semi-products made by the methods of severe plastic deformations
Autorzy:
Andrzejewski, D.
Borowski, J.
Wiśniewska-Weinert, H.
Kulczyk, M.
Pachla, W.
Powiązania:
https://bibliotekanauki.pl/articles/211814.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Tematy:
stopy aluminium
ECAP
test ściskania
wyciskanie hydrostatyczne
aluminum alloy
compression test
hydrostatic extrusion
Opis:
W pracy przedstawiono wyniki badań wpływu kształtowania półwyrobów metodą dużych odkształceń plastycznych (SPD), takich jak: przeciskanie przez kanał kątowy (ECAP) czy wyciskanie hydrostatyczne (HE) na właściwości mechaniczne aluminium oraz stopów 5483 i 7475. Określono plastyczność materiałów w próbie ściskania i wpływ prędkości odkształcania na charakter krzywej umocnienia. We wcześniejszych badaniach określono graniczną temperaturę kształtowania nie powodującą znacznego rozrostu ziarna do 250 oC. Dlatego wyznaczano krzywe umocnienia tylko do tej temperatury. Półwyroby, po procesach ECAP i HE, posiadają wyższą twardość i naprężenie uplastyczniające, w porównaniu z klasycznymi stopami komercyjnymi. Badane materiały są plastyczne i umożliwiają kształtowanie wyrobów w temperaturze niższej niż temperatura rekrystalizacji.
The paper presents the results of the investigation of the influence of forming semi-products by the methods of severe plastic deformations (SPD), such as: equal-channel angular pressing (ECAP) or hydrostatic extrusion (HE) on the mechanical properties of aluminium as well as 5483 and 7475 alloys. Plasticity of the materials has been determined in a compression test; the influence of deformation speed on the character of the workhardening curve has also been determined. In previous investigations, the limit temperature of forming not causing significant grain growth has been found to be 250 oC . That is why the work-hardening curves have been determined only up to that temperature. Semi-products after the processes of ECAP and HE have higher hardness and yield stress as compared to the classic commercial alloys. The materials under investigation are plastic and make it possible to form products at a temperature lower than that of recrystallization.
Źródło:
Obróbka Plastyczna Metali; 2011, 22, 1; 3-13
0867-2628
Pojawia się w:
Obróbka Plastyczna Metali
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza rozwoju systemów dozowania stopów aluminium w zimnokomorowych maszynach ciśnieniowych
Analysis of the Development of Dosing Systems of Aluminium Alloys in the Cold Chamber Die Casting Machines
Autorzy:
Kowalczyk, W.
Dańko, R.
Powiązania:
https://bibliotekanauki.pl/articles/381900.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
odlewnictwo ciśnieniowe
maszyna ciśnieniowa
stop aluminium
die casting
die casting machine
aluminum alloy
Opis:
W publikacji poddano analizie tradycyjne i automatyczne systemy dozowania stopów aluminium w zimnokomorowych maszynach ciśnieniowych dominujące w europejskim odlewnictwie. Omówiono ogólne cechy istniejących, automatycznych rozwiązań systemów dozowania oraz nowych rozwiązań, powiązanych z maszyną ciśnieniową. Przedstawiono także podejmowane przez producentów działania w zakresie dalszego rozwoju tych systemów.
The analysis of traditional and automated dispensing systems of aluminium alloys in cold-chamber die casting machines, prevalent in European foundries is presented in paper. The general characteristics of existing automated dispensing systems solutions, characterizing the functionality of new solutions in cooperation with the die casting machine, as well as the actions taken to further their development is presented.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4 spec.; 73-78
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Nonmetallic Inclusions in Aluminum–Silicon Alloys
Autorzy:
Galek, Tomasz
Łączek, Andrzej
Łysiak, Karol
Powiązania:
https://bibliotekanauki.pl/articles/176066.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum–silicon alloy
nonmetallic inclusions
scanning electron microscopy
X-ray tomography
Opis:
In this article, a study of nonmetallic inclusions introduced during the casting process of the aluminum–silicon alloy is presented. The samples were investigated using a scanning electron microscope to find the chemical composition and X-ray tomography to check the volumetric content of the non-metallic inclusions. The samples were made from AlSi7Mg alloy, used for car wheels, with 7% weight content of Si, 89% of Al, and 0.3% of Mg. The main goal of our investigations was to find out the chemical composition of the impurities and to identify the stage of the casting process at which the impurities are introduced.
Źródło:
Advances in Manufacturing Science and Technology; 2020, 44, 1; 28-31
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Natural Ageing on Impact Strength of the EN AC-AlSi9Cu3(Fe) Alloy
Autorzy:
Pezda, J.
Jarco, A.
Powiązania:
https://bibliotekanauki.pl/articles/382298.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
natural ageing
impact strength
stop aluminium
starzenie naturalne
odporność na uderzenia
Opis:
Growing market demand, more and more efficient and cleaner vehicles create a challenge for automotive industry. Properties of aluminum, such as: high strength stiffness to weight ratio, high fluidity and castability, easy machinability and weldability and good corrosion resistance make them ideal candidate to replacement of a heavier materials used in vehicles, and the same, have direct effect on fuel consumption. Comparing to steel, titanium or carbon fibers, aluminum alloys are characterized by low impact strength, which can be improved by a heat treatment. In this study one investigated the effect of the heat treatment (natural ageing) on the EN AC-AlSi9Cu3(Fe) alloy modified with strontium. Solution heat treatment temperature’s ranges were selected on the base of heating (melting) curves recorded with use of the thermal derivative analysis (ATD) method. Temperatures of the solution heat treatment were 495°C, 510°C, and 525°C ± 5°C, while the solutioning time ranged from 15 to 105 minutes (15; 60 and 105 min.). Time of the ageing amounted to 1, 3 and 7 days. To determine impact strength of the alloy after performed heat treatment one implemented simplified Charpy test. Maximal values of the impact strength (9,6 J/cm2) were obtained for solutioning temperature 510°C and solutioning time 15 minutes, after seven days of ageing. Obtained results enabled determination of solutioning parameters, which allow obtainment of increased impact strength of the investigation alloy for the T4 heat treatment.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1 spec.; 81-84
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Affecting the Crystallization of Al-based alloys by Electromagnetic Field
Autorzy:
Bolibruchová, D.
Brůna, M.
Powiązania:
https://bibliotekanauki.pl/articles/379575.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
silicon
inoculation
strontium
electromagnetic field
stop aluminium
silikon
stront
pole elektromagnetyczne
Opis:
This article deal with non-conventional methods to affect the crystallization of Al-alloys by the application of electromagnetic field. The application of electromagnetic field is not technically complicated, it does not require mechanical contact with the melt, and the scale of the crystallization influence is not dependent on the thickness of the casting. Two experimental materials were used: AlSi10MgMn and AlSi8Cu2Mn and two values of electromagnetic induction: B = 0.1 T a B = 0.2 T. The best results for alloy AlSi10MgMn were achieved by application of electromagnetic field with induction B = 0.2 T; during this experiment the best mechanical properties were achieved - the biggest increase of mechanical properties was recorded. The best results for alloy AlSi8Cu2Mn were achieved by combination of electromagnetic field with induction B = 0.1 T and modification by 0.05 wt. % Sr. In this case we don´t recommend to use electromagnetic field with induction B = 0.2 T; because of deposition of coarse grains and decreasing of mechanical properties.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 157-162
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie metody ATND do oceny właściwości mechanicznych okołoeutektycznego stopu AlSi12Cu2(Fe)
Application of the ATND method to assessment of mechanical properties of near eutectic AlSi12Cu2(Fe) alloy
Autorzy:
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/269764.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
aluminum alloy
mechanical properties
ATND
modification
crystallization
stop aluminium
właściwości mechaniczne
modyfikacja
krystalizacja
Opis:
Struktura i właściwości mechaniczne siluminów są w dużym stopniu zależne od szybkości chłodzenia, składu oraz operacji modyfikacji i obróbki cieplnej. W artykule opisano badania doświadczalne dotyczące zastosowania metody ATND (analiza termiczno-napięciowo- różnicowa) oraz analizy regresji do oceny jakości stopu AlSi12Cu2(Fe) modyfikowanego strontem na etapie jego przygotowania. Uzyskane zależności pomiędzy wartościami temperatury i napięcia w punktach charakterystycznych krzywych metody ATND umożliwiają predykcję właściwości mechanicznych (Rsp0,02, Rm, A5) badanego stopu. Pozwala to już na etapie przygotowania stopu ocenić jego właściwości mechaniczne bez konieczności prowadzenia pracochłonnych badań i wprowadzić ewentualne działania korygujące, mające na celu poprawę jego właściwości.
Structure and mechanical properties of silumins are highly dependent on cooling rate, composition and operations of modification and heat treatment. The present article describes experimental research concerning use of the ATND method (thermal-voltage-derivative analysis) and regression analysis to assessment of quality of AlSi12Cu2(Fe) alloy modified with strontium at the stage of its preparation. Obtained relationships between values of temperature and voltage in characteristic points on curves from ATND method enable prediction of mechanical properties (R0,02, Rm, A5) of the investigated alloy. This allows, as early as in preparation stage of the alloy, to evaluate its mechanical properties without need of labour consuming tests, and to introduce possible corrective measures aimed at improvement of its properties.
Źródło:
Inżynieria Maszyn; 2017, R. 22, z. 1; 47-57
1426-708X
Pojawia się w:
Inżynieria Maszyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ metod naprawy podłużnicy na bezpieczeństwo bierne pojazdu osobowego
Influence of method repair of longitudinal on passive safety of passenger vehicle
Autorzy:
Węgrzyn, T.
Hadryś, D.
Świerkosz, M.
Powiązania:
https://bibliotekanauki.pl/articles/270532.pdf
Data publikacji:
2013
Wydawca:
Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:
podłużnica
bezpieczeństwo bierne
stopy aluminium
zderzenie
longitudinal
passive safety
aluminum alloy
car crash
Opis:
W artykule przedstawiono zagadnienia dotyczące naprawy powypadkowej podłużnie samonośnego nadwozia pojazdu, wykonanych ze stopów aluminium. Przeprowadzono badania o charakterze dynamicznym i porównano wyniki dla elementów nowych i naprawionych. Podjęto próbę odpowiedzi na pytanie, która z zaproponowanych metod naprawy jest lepsza w aspekcie bezpieczeństwa użytkowników pojazdu.
The article presents the issues of post-accident repair of carbody longitudinal, which are made by aluminum alloys. The dynamic tests were carried out. Results for new and repaired parts were compared. It attempts to answer the question, which of the proposed repair method is better in terms of safety of the vehicle users.
Źródło:
Aparatura Badawcza i Dydaktyczna; 2013, 18, 2; 141-147
2392-1765
Pojawia się w:
Aparatura Badawcza i Dydaktyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Microstructure and Mechanical Properties of Al 3003 Alloy Weld by Stationary Shoulder Friction Stir Welding Process
Autorzy:
Jung, Woo-Chul
Park, Joo-Heon
Yoon, Sang-Min
Kim, Young Kyun
Powiązania:
https://bibliotekanauki.pl/articles/2203728.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stationary shoulder friction stir welding
aluminum 3003 alloy
microstructure
mechanical properties
Opis:
The lap joint welding of Al 3003 alloy by stationary shoulder friction stir welding (SSFSW) was performed under the conditions of tool rotation and welding speed, and it was confirmed that the welding was performed under all conditions. The tunnel defects and pores were formed in the weld zone at the lowest tool rotation and welding speed, and it is increased, the weld surface has been improved. At the same tool rotation speed at the welding speed is increased, the grain size was refined in the stir zone (SZ) and thus the hardness increased by about 14% compared to the base metal. The tensile shear strength is measured to be 10 kN or more under most conditions, and in the 4000 rpm with high heat input, the shear tensile strength was measured relatively lower than other conditions due to excessive heat input of the material.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 113--118
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of friction stir processing parameters of aluminum alloy reinforced with hybrid nanoparticles using the Taguchi method
Autorzy:
Ali, Mohammed Sultan
Al Saffar, Iman Q.
Powiązania:
https://bibliotekanauki.pl/articles/27312410.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
stop aluminium
metoda Taguchi
tarcie
aluminum alloy
friction stir processing
nanoparticles
Taguchi method
ANOVA
Opis:
This study deals with the selection of optimum parameters for friction stir processing of Al alloy 6061-T6 reinforced with a hybrid nanoparticle (B4C and SiO2) in terms of their effect on the mechanical properties (hardness, tensile strength, and wear resistance) using Taguchi method. This work was carried out under four parameters each one running in three levels; rotational speeds (800, 1000 and 1200) rpm, travel speeds (10, 20, and 30) mm/min, holes depth (2, 2.5, and 3) mm, and mixing ratio of (SiO2/B4C) nanoparticles (1/1, 1/2, and 1/3), using L9 (34) Taguchi orthogonal array. Tensile strength and microhardness tests were conducted to evaluate the mechanical properties, in addition to the wear resistance test which is carried out using a pin-on-disk device. The microstructure was examined by optical microscopy, field emission scanning electron microscopy, and x-ray diffraction analysis. It was found that the highest tensile strength (223) MPa at 1200 rpm rotational speed, 30 mm/min traverse speed, 2.5 mm holes depth, and 1/2 (SiO2/B4C) nanoparticles mixing ratio, the highest hardness reached is (155) HV, then decreases in the direction of thermomechanically affected zone (TMAZ), heat affected zone (HAZ), and the base material at (1200) rpm rotational speed, (30) mm/min linear speed, a hole depth of (2) mm and (1/3) mixing ratio of (B4C/SiO2) nanoparticles. The wear behavior was of a mild type or an oxidative type at low loads (5 N), which became severe or metallic wear at higher loads (20 N) at fixed sliding time and speed. The (ANOVA) table has been used to determine which parameter is the most significant using MINITAB software.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 4; 13--25
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Próby doświadczalne procesu walcowania poprzeczno-klinowego odkuwek ze stopów aluminium w gatunkach PA38 i 2618A
Experimental tests of cross-wedge rolling process of forgings from aluminum alloys type PA38 and 2618A
Autorzy:
Tomczak, J.
Pater, Z.
Powiązania:
https://bibliotekanauki.pl/articles/211444.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Tematy:
walcowanie poprzeczno-klinowe
stop aluminium
PA38
2618A
cross-wedge rolling
aluminum alloy
Opis:
W artykule przedstawiono wyniki doświadczalnych prób walcowania poprzeczno-klinowego na gorąco odkuwek ze stopów aluminium w gatunkach PA38 i 2618A. Badania przeprowadzono na płasko klinowej walcarce laboratoryjnej LUW-2, wykorzystując typowe narzędzia klinowe. W trakcie eksperymentu analizowano parametry siłowe, geometryczne oraz stabilność procesu. W efekcie przeprowadzonych doświadczeń potwierdzono możliwość kształtowania wyrobów osiowo-symetrycznych ze stopów aluminium w procesach WPK.
This paper presents results of experimental tests of cross-wedge rolling in hot conditions of forgings from aluminum alloys type PA38 and 2618A. The research works were conducted on a flat- wedge rolling mill LUW-2, with the application of typical wedge tools. During the experiment force parameters, geometrical parameters and pro-cess stability were analyzed. In the result of the conducted experiments, it was confirmed that it is possible to form axi-symmetrical parts from aluminum alloys in CWR processes.
Źródło:
Obróbka Plastyczna Metali; 2010, 21, 4; 249-260
0867-2628
Pojawia się w:
Obróbka Plastyczna Metali
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania odkształcalności stopów aluminium serii 5xxx o wysokiej zawartości Mg w procesie półprzemysłowego wyciskania
Study of the deformability of 5xxx series aluminum alloys with high Mg content in a semi-industrial extrusion process
Autorzy:
Leśniak, D.
Rękas, A.
Libura, W.
Powiązania:
https://bibliotekanauki.pl/articles/211740.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Tematy:
stopy aluminium serii 5xxx
wyciskanie
homogenizacja
5xxx series aluminum alloy
extrusion
homogenization
Opis:
W pracy przedstawiono wyniki badań procesu wyciskania na gorąco stopów AlMg o wysokich zawartościach Mg; analizę odkształcalności materiału i badania własności wytrzymałościowych wyrobu. Próby wyciskania kształtowników ze stopów aluminium w gatunkach PN-EN 5083 i PN-EN 5019 wykonano na półprzemysłowej prasie hydraulicznej poziomej o nacisku 5 MN, z wykorzystaniem matryc płaskich 2-otworowych. Analizowano parametry procesu wyciskania oraz własności mechaniczne kształtowników wyciskanych ze stopów o rożnej zawartości Mg. Określono maksymalną, dopuszczalną prędkość wypływu metalu z otworu matrycy i graniczne temperatury solidus i likwidus ww. stopów w zależności od zawartości Mg w stopie.
This paper presents the results of studies of the hot extrusion process of AlMg aluminum alloys with high Mg content; analysis of material deformability, and tests of product strength properties. Trial extrusions of sections made of aluminum alloy grades PN-EN 5083 and PN-EN 5019 were conducted on a semi-industrial horizontal hydraulic press with a pressing force of 5 MN using 2-hole flat dies. Extrusion process parameters and mechanical properties of sections extruded from alloys of varying Mg content were analyzed. The maximum acceptable rate of metal extrusion from the die hole and limit solidus and liquidus temperatures of the aforementioned alloys were determined depending on the Mg content in the alloy.
Źródło:
Obróbka Plastyczna Metali; 2014, 25, 3; 159-167
0867-2628
Pojawia się w:
Obróbka Plastyczna Metali
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fatigue crack growth and probability assessment for transverse TIG welded Aluminum alloy 6013-T4
Autorzy:
Haryadi, G. D.
Tungga Dewa, R.
Ekaputra, I. M. W.
Powiązania:
https://bibliotekanauki.pl/articles/280013.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
fatigue crack growth
Aluminum alloy 6013-T4
post welding heat treatment
TIG welding
Opis:
The aim of this study is to investigate the fatigue crack growth behavior with post weld heat treatments (T4) on transverse tungsten inert gas-welded Aluminum alloy 6013. All fatigue tests have been carried out using center cracked tension specimens at ambient temperature under a stress ratio of R = 0.3. The results revealed that various time of aging in T4 affects its mechanical properties, also the fatigue crack growth behavior as well. It has been observed that in the heat treated samples the crack growth rate is lower than that in the as-welded sample, but higher than the rate in the base metal. To be more specific, samples with 18 hours aging exhibit the highest tensile strength and fatigue resistance compared to the other heat treated samples. The probability assessment has also been used to determine the fatigue crack growth rate and a good linearity has been found.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 179-190
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wytrzymałość profili stosowanych do produkcji kratek maskujących grzejniki podłogowe
Strength of profiles applying to masking floor heater grates production
Autorzy:
Lonkwic, P.
Usydus, I.
Włosek, M.
Powiązania:
https://bibliotekanauki.pl/articles/404521.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo AWART
Tematy:
floor heater grate
aluminum alloy profile
load simulation
systemy grzewcze
profil aluminiowy
grzejniki podłogowe
Opis:
The grates of floor heater are loads generated by two causes: human weight and shock load from fall dawn elements. In this paper there were presented the strength analyze of grate made of four types of crosswise profiles: three made of aluminum alloy 6060 and one, with rectangular crosswise, made of wood. Load simulation made using testing machine type HT-2402s with system Pontos for photogrammetric measures.
Wytrzymałość elementów wykończeniowych produktów konsumenckich jest bardzo ważnym aspektem technicznoekonomicznym w otaczającym nas świecie. Z jednej strony producenci chcąc zaoszczędzić na kosztach zakupu materiałów, stosują materiały na granicy ich wytrzymałości, z drugiej strony ważny jest element estetyki. Dlatego często zadawane jest pytanie: jak długo można użytkować produkt bez utraty tych cech? Kratki grzejników podłogowych poddawane są obciążeniom wynikającym głównie z dwóch przyczyn: obciążeniom pochodzącym od człowieka oraz obciążeniom udarnościowym od spadających elementów na kratkę. Analizie poddano kratki wykonane z profili o czterech typach przekrojów poprzecznych: trzech wykonanych ze stopu aluminium 6060 oraz czwarty, o przekroju prostokątnym wykonany z drewna. Symulacje obciążeniowe wykonano na maszynie wytrzymałościowej typu HT-2402s z użyciem systemu do pomiarów fotogrametrycznych Pontos.
Źródło:
Obróbka Metalu; 2017, 4; 46-51
2081-7002
Pojawia się w:
Obróbka Metalu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Cycle Fatigue Performance of Hollow-Extruded 6005A-T6 Aluminum Alloy Characterized by a Layered Microstructure
Autorzy:
Ma, Zhongwei
Ma, Lin
Xu, Bo
Dan, Chuchen
He, Zhaokun
Wang, Yue
Powiązania:
https://bibliotekanauki.pl/articles/354038.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
friction stir welding
hollow-extruded 6005A-T6 aluminum alloy
fatigue
fracture
microstructure
Opis:
Sound joint of hollow-extruded 6005A-T6 aluminum alloy was achieved by friction stir welding and its high cycle fatigue performance was mainly investigated. As a result, the joint fatigue limit reaches 128.1 MPa which is 55% of the joint tensile strength. The fatigue fracture mainly occurs at the boundary between the stir zone and thermo-mechanically affected zone due to the large difference in the grain size. This difference is caused by the layered microstructure of the base material. The shell pattern with parallel arcs is the typical morphology in the fracture surface and the distance between arcs is increased with the increase of stress level. The specimen with the fracture located in the stir zone possesses a relatively low fatigue life.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 285-292
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie procesu zgniatania obrotowego na zimno wyrobów z trudnoodkształcalnych stopów aluminiowych objętych normą PN-EN 573-3/AK
Investigation of cold flow forming process of hard-to-deform aluminium alloy sheet included in standard PN-EN 573-3/AK
Autorzy:
Gądek, T.
Sosnowski, S.
Drenger, T.
Wiśniewski, J.
Nowacki, Ł
Ulatowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/211668.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Tematy:
zgniatanie obrotowe
stop aluminium
wyrób cylindryczny
odkształcenie
flow forming
aluminum alloy
cylindrical product
deformation
Opis:
W artykule przedstawiono sposób kształtowania wydłużonych wyrobów cylindrycznych, ze stopu aluminium 7075, metodą zgniatania obrotowego na zimno. Program przeprowadzonych badań przewidywał dobór parametrów kinematycznych przy zgniataniu, wprowadzenie obróbki cieplnej, oraz przeprowadzenie oceny jakości otrzymanej powierzchni wyrobu.
Paper presents method of forming cylindrical details from special alloy 7075 by cold flow forming. Investigations program includes selection of kinematics parameters in compression, heat treatments problems and surface quality control.
Źródło:
Obróbka Plastyczna Metali; 2007, 18, 2; 9-14
0867-2628
Pojawia się w:
Obróbka Plastyczna Metali
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formation of porosity in Al-Si alloys
Autorzy:
Brůna, M.
Sládek, A.
Kucharčík, L.
Powiązania:
https://bibliotekanauki.pl/articles/382386.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
porowatość
stop aluminium
symulacja
strefa półciekła
porosity
aluminum alloy
simulation
mushy zone
tatur test
Opis:
Porosity is one of the major defects in aluminum castings, which results in a decrease of the mechanical properties. It is induced by several mechanisms (solidification shrinkage and gas segregation). One of the method for complex evaluation of macro and micro porosity in Al-Si alloys is Tatur test technique. This article deals with evaluation of porosity with help of Tatur tests for selected Al-Si alloys. These results will be compared with results obtained from simulation software ProCAST.
Źródło:
Archives of Foundry Engineering; 2012, 12, 1; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Comparative Analysis of the Inclusion Removal Efficiency of Different Fluxes
Autorzy:
Máté, M.
Tokár, M.
Fegyverneki, G.
Gyarmati, G.
Powiązania:
https://bibliotekanauki.pl/articles/946873.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
castings defects
aluminum alloy
inclusions
cleaning flux
melt treatment
wady odlewów
stop aluminium
wtrącenia
Opis:
The Comparative Analysis of the Inclusion Removal Efficiency of Different Fluxes
Źródło:
Archives of Foundry Engineering; 2020, 20, 2; 53-58
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Cooling Rate on the Precipitation Characteristics of Cast Al-Si-Cu Alloy
Autorzy:
Okayasu, M.
Sahara, N.
Touda, M.
Powiązania:
https://bibliotekanauki.pl/articles/2079810.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
casting
solid solution
aging
solidification rate
precipitation
stop aluminium
odlew
szybkość krzepnięcia
Opis:
The influence of the cooling rate on the extent of precipitation hardening of cast aluminum alloy (ADC12) was investigated experimentally. This study explored the cooling rate of the solidification of Cu in the α-Al phase to improve the mechanical properties of ADC12 after an aging process (Cu based precipitation hardening). The solid solution of Cu occurred in the α-Al phases during the casting process at cooling rates exceeding 0.03°C/s. This process was replaced with a solid solution process of T6 treatments. The extent of the solid solution varied depending on the cooling rate; with a higher cooling rate, a more extensive solid solution was formed. For the cast ADC12 alloy made at a high cooling rate, high precipitation hardening occurred after low-temperature heating (at 175°C for 20 h), which improved the mechanical properties of the cast Al alloys. However, the low-temperature heating at the higher temperature for a longer time decreased the hardness due to over aging.
Źródło:
Archives of Foundry Engineering; 2021, 21, 4; 55-60
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evaluation of properties of mechanically clinched joints made of ferrous and non-ferrous materials
Autorzy:
Kaščák, Ľuboš
Spišák, Emil
Kubík, René
Majerníková, Janka
Powiązania:
https://bibliotekanauki.pl/articles/102061.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
clinching
aluminum alloy
steel sheets
tensile test
klinczowanie
stop aluminium
blachy stalowe
próba rozciągania
Opis:
Nowadays, there are several reasons for the utilization of the sheets made of aluminum in the car body production. Besides decreasing the car body weight, there is a need to reduce fuel consumption of the vehicle as well as the environmental impact by lower production of emissions. Moreover, such reasons are mutually dependent or influence each other. The application of the aluminum sheets in hybrid car body production resulted in the need for innovative joining techniques, which could make it possible to successfully join sheets from aluminum alloys. Mechanical clinching is one of the new or innovative joining techniques, which belongs to cold-forming joining process, which makes it possible to join different kinds and thicknesses of sheets. Individual materials and thicknesses can be combined. The mechanically clinched joints are durable, and the joining process duration is very fast (duration of 1s) and does not have a distinctive impact on the environment; a protective layer of the sheets remains intact. The paper focuses on the evaluation of the properties of hybrid joints that were prepared by the single stroke clinching process with a rigid die. The hot-dip galvanized steel sheets DC06 and H220PD combined with the sheets from aluminum alloys EN AW 5754 (having different values of the hardness – H11, H22, and H24) and EN AW 6082 were used for joining. The results from experiments confirmed the mechanical clinching is the suitable technique for joining such combination of sheets. However, some considerations, such as the arrangement of the sheets about the punch and die, must be regarded.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 1; 162-170
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fatigue Behavior of MIG-Welded 7N01-T4 Aluminum Alloy with Different V-Groove Angles
Autorzy:
Ma, Zhongwei
Li, Qinghua
Ma, Lin
He, Zhaokun
Liang, Zhimin
Powiązania:
https://bibliotekanauki.pl/articles/351758.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
7N01-T4 aluminum alloy
MIG welding
V-groove angle
fatigue
fracture
Opis:
7N01-T4 aluminum alloy was welded by metal inert gas welding and the influence of V-groove angle on joint fatigue properties was investigated. The results indicate that the volume of fusion zone (FZ) and the grains in FZ become small when the groove angle decreases to 50° from 70°. Most pores distribute at the FZ edge and fewer pores are formed in the small angle joint. The fatigue crack mainly initiates at the transition region between the weld passes due to the pore concentration. The small angle contributes to increasing joint fatigue properties, especially at the low stress level. The fatigue strength of 50° joint is 103.06 MPa which is 15.3% higher than that of 70° joint.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1577-1584
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of High Strain Rate Flow Behavior of 7175 Aluminum Alloy Based on Arrhenius-Type Constitutive Equations
Autorzy:
Shin, Young-Chul
Joung, Dae-Kwan
Ha, Seong-Ho
Choi, Ho-Joon
Hyun, Soong-Keun
Powiązania:
https://bibliotekanauki.pl/articles/356627.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
hot compression
Arrhenius-type equation
high strain rate flow behavior
flow stress
Opis:
The flow behavior of 7175 aluminum alloy was modeled with Arrhenius-type constitutive equations using flow stress curves during a hot compression test. Compression tests were conducted at three different temperatures (250°C, 350°C, and 450°C) and four different strain rates (0.005, 0.05, 0.5, and 5 s-1). A good consistency between measured and set values in the experimental parameters was shown at strain rates of 0.005, 0.05, and 0.5 s-1, while the measured data at 5 s-1 showed the temperature rise of the specimen, which was attributable to deformation heat generated by the high strain rate, and a fluctuation in the measured strain rates. To minimize errors in the fundamental data and to overcome the limitations of compression tests at high strain rates, constitutive equations were derived using flow curves at 0.005, 0.05, and 0.5 s-1 only. The results indicated that the flow stresses predicted according to the derived constitutive equations were in good agreement with the experimental results not only at strain rates of 0.005, 0.05, and 0.5 s-1 but also at 5 s-1. The prediction of the flow behavior at 5 s-1 was correctly carried out by inputting the constant strain rate and temperature into the constitutive equation.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1361-1364
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalizacja kształtu wykresu Wöhlera z wykorzystaniem algorytmów ewolucyjnych w ujęciu diagnostycznym
High-fatigue Wöhler curve shape optimization by evolutionary algorithms at diagnostics
Autorzy:
Woch, M.
Kłysz, S.
Powiązania:
https://bibliotekanauki.pl/articles/209129.pdf
Data publikacji:
2013
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
wykres Wöhlera
algorytmy ewolucyjne
optymalizacja
stop aluminium
Wohler curve
evolutionary algorithms
optimization
aluminum alloy
Opis:
Optymalizacja kształtu wykresu zmęczenia wysokocyklowego Wöhlera jest problemem nieposiadającym analitycznego rozwiązania. Do próby rozwiązania można podejść, wykorzystując różne algorytmy optymalizacyjne. W pracy dokonano próby znalezienia optymalnego kształtu wykresu zmęczenia wysokocyklowego obrazującego zależność trwałości zmęczeniowej 2Nf w funkcji amplitudy naprężenia σa, przy użyciu algorytmów ewolucyjnych. Zastosowano algorytmy ewolucyjne ze względu na łatwość dopasowania do danych wejściowych oraz szybkość działania. Przeszukują one przestrzeń alternatywnych rozwiązań w celu znalezienia rozwiązania potencjalnie najlepszego. Zastosowano pięcioparametrowe równanie eksponencjalne zapewniające lepsze dopasowanie pełnego wykresu Wöhlera do danych doświadczalnych w zakresie naprężeń na poziomie granicy zmęczeniowej. Równanie to uwzględnia aproksymację zakresu quasi-statycznego i niskocyklowego dla naprężeń największych. Dokonano obliczeń dla dwóch różnych zestawów próbek pochodzących z półki dolnej dźwigara łopaty śmigłowca Mi-2 po resursie.
High-fatigue diagram shape optimization is a problem without an analytical solution. The problem can be approached by optimization algorithms. Among these, evolutionary algorithms deserve special attention, due to their wide range of applications and non-dependence on curves shape. The thesis contains equation formulations and calculations for determining an optimal high-fatigue curve shape using optimization algorithms. This curve shows the dependence of the fatigue life as a function of the amplitude of strain. Due to simplicity in fitting to the input data and the computing speed evolutionary algorithms were used. These algorithms search the space of alternative solutions in order to find a potentially best solution. 5-parameter exponential equation provided a better fit experimental data on stress at the lower limit of fatigue to full-Wöhler curve were applied. Approximation to quasi-static and low cycle fatigue of the greatest stress range is also included. Calculations were made for two different sets of samples from the lower flange of airscrew blade spar from Mi-2 helicopter after service.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2013, 62, 4; 219-227
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical Properties and Melt Quality Relationship of Sr-modified Al-12Si Alloy
Autorzy:
Uludağ, M.
Uyaner, M.
Yilmaz, F.
Dişpinar, D.
Powiązania:
https://bibliotekanauki.pl/articles/380647.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
silicon alloy
modification
quality of casting
bifilm index
porosity
stop aluminium
stop krzemowy
jakość odlewu
porowatość
Opis:
The formation of oxide film on the surface of aluminium melts, i.e. bifilms, are known to be detrimental when they are incorporated into the cast part. These defects causes premature fractures under stress, or aid porosity formation. In this work, Al-12 Si alloy was used to cast a step mould under two conditions: as-received and degassed. In addition, 10 ppi filters were used in the mould in order to prevent bifilm intrusion into the cast part. Reduced pressure test samples were collected for bifilm index measurements. Samples were machined into standard bars for tensile testing. It was found that there was a good agreement with the bifilm index and mechanical properties.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4; 134-140
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aluminium w nowoczesnych konstrukcjach budowlanych
Aluminum in the modern building constructions
Autorzy:
Kwiatkowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2068079.pdf
Data publikacji:
2012
Wydawca:
Politechnika Częstochowska
Tematy:
konstrukcja budowlana
materiał konstrukcyjny
stop aluminium
aluminium
architektura współczesna
building construction
construction material
aluminum alloy
aluminum
modern architecture
Opis:
Tematem niniejszej pracy jest zastosowanie i wykorzystanie aluminium we współczesnym budownictwie i w architekturze. Zaprezentowano niekonwencjonalne konstrukcje istniejących budowli oraz rozwiązania konstrukcji, w których wykorzystano stopy aluminium.
The subject of this paper is the adaptation and the usage of aluminum in the modern building industry and architecture. This work also presents both the unconventional constructions of existing buildings and other constructions, in which the aluminum alloys were used.
Źródło:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2012, 18 (168); 108--115
0860-7214
Pojawia się w:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identifying Optimal Friction Stir Welding Process Parameters for 2024 Al Alloy Butt Joints
Autorzy:
Kluz, Rafał
Bucior, Magdalena
Kubit, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/102056.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
design of an experiment
friction stir welding
aluminum alloy
projekt eksperymentu
zgrzewanie tarciowe
stop aluminium
Opis:
Friction stir welding (FSW) is a solid state joining process used to join metals and their alloys. The main goal of this paper was to select the optimal welding parameters such as: rotational speed and the feed rate of the tool. The article presents the results of the tests on welding 1 mm thick 2024 aluminum sheet according to the statistical 3-level completed plan PS/DK 32. The rotational speed of the tool varied within the range of 1100–1300 rpm and the feed rate within the range of 40–60 mm/min. For these parameters, the analyses of the experiment repeatability, impact significance and adequacy of equations were conducted.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 4; 48-53
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and Usable Properties of Aluminum Continuous Ingots
Autorzy:
Wróbel, T.
Szajnar, J.
Bartocha, D.
Stawarz, M.
Powiązania:
https://bibliotekanauki.pl/articles/381301.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
continuous casting
aluminum alloy
structure
inoculation
electromagnetic stirring
odlewanie ciągłe
stop aluminium
modyfikacja
mieszanie elektromagnetyczne
Opis:
In paper is presented results of studies concerning ingot of Al with a purity of 99.5% cast with use of stand of horizontal continuous casting. Mainly together with casting velocity was considered influence of electromagnetic stirrer, which was placed in continuous casting mould on refinement of ingots structure and theirs usability to plastic deformation. Effect of structure refinement and usability to plastic deformation obtained by influence of electromagnetic stirring was compared with refinement obtained by use of traditional inoculation, which consists in introducing of additives i.e. Ti and B to metal bath. On the basis of obtained results was affirmed that inoculation realized by electromagnetic stirring in range of continuous casting mould guarantees improvement in structure refinement and usability to rolling of pure Al continuous ingots.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3; 85-90
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of load and reinforcement content on selected tribological properties of Al/SiC/Gr hybrid composites
Autorzy:
Veličković, S.
Miladinović, S.
Stojanović, B.
Nikolić, R. R.
Hadzima, B.
Arsić, D.
Powiązania:
https://bibliotekanauki.pl/articles/111714.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
aluminum alloy
hybrid composites
silicon carbide
graphite
particles
stop aluminium
węglik krzemu
grafit
kompozyty hybrydowe
Opis:
Hybrid materials with the metal matrix are important engineering materials due to their outstanding mechanical and tribological properties. Here are presented selected tribological properties of the hybrid composites with the matrix made of aluminum alloy and reinforced by the silicon carbide and graphite particles. The tribological characteristics of such materials are superior to characteristics of the matrix – the aluminum alloy, as well as to characteristics of the classical metal-matrix composites with a single reinforcing material. Those characteristics depend on the volume fractions of the reinforcing components, sizes of the reinforcing particles, as well as on the fabrication process of the hybrid composites. The considered tribological characteristics are the friction coefficient and the wear rate as functions of the load levels and the volume fractions of the graphite and the SiC particles. The wear rate increases with increase of the load and the Gr particles content and with reduction of the SiC particles content. The friction coefficient increases with the load, as well as with the SiC particles content increase.
Źródło:
Production Engineering Archives; 2018, 18; 18-23
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of SiO2 flux on the depth of penetration, microstructure, texture and mechanical behavior of AA6063 T6 aluminum alloy using activated TIG welding
Autorzy:
Kumar, Rajiv
Vettivel, S. C.
Kumar Kansal, Harmesh
Powiązania:
https://bibliotekanauki.pl/articles/2173585.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
depth of penetration
tensile strength texture
stop aluminium
głębokość penetracji
wytrzymałość na rozciąganie
Opis:
Activated tungsten inert gas (ATIG) welding has a good depth of penetration (DOP) as compared to the conventional tungsten inert gas (TIG) welding. This paper is mainly focused on ATIG characterization and mechanical behavior of aluminum alloy (AA) 6063-T6 using SiO2 flux. The characterization of the base material (BM), fusion zone (FZ), heat affected zone (HAZ) and, partially melted zone is carried out using the suitable characterization methods. The weld quality is characterized using ultrasonic-assisted non-destructive evaluation. A-scan result confirms that the ATIG welded samples have more DOP and less bead width as compared to conventional TIG. The recorded tensile strength of ATIG with SiO2 is better than the conventional TIG welding. The failure mode is ductile for ATIG welding with larger fracture edges and is brittle in the case of conventional TIG welding.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136215
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of material of mould and modification on the structure of AlSi11 alloy
Autorzy:
Łągiewka, M.
Konopka, Z.
Powiązania:
https://bibliotekanauki.pl/articles/382435.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metalografia
stop aluminium
modyfikacja
struktura stopu
forma odlewnicza
metallography
aluminum alloy
modification
structure
foundry mould
Opis:
The presented work discusses the influence of material of foundry mould on the effect of modification of AlSi11 alloy. For this purpose castings were produced in moulds made of four various materials. Castings of the first type were cast in a metal die, the second ones in the conventional mould of bentonite-bound sand, those of the third type in the sand mould with oil binder, the last ones in a shell mould where phenol-formaldehyde resin was applied as a binder. All the castings were made of AlSi11 alloy modified with strontium. For a purpose of comparison also castings made of the non-modified alloy were produced. The castings were examined with regard to their microstructures. The performed investigations point out that the addition of strontium master alloy results in refining of the alloy structure, particularly of the \alfa-phase, causes some morphological changes in the alloy and the refinement of eutectics. The advantageous influence of modifier on the structure of the examined silumin was observed particularly in the case of alloy cast either in the conventional oil-bound sand mould or in the shell mould. The non-modified alloy cast into a metal die exhibits a structure similar to those of modified alloy solidifying in the other moulds. The improvement in both tensile strength and unit elongation suggests that the modification was carried out correctly. The best mechanical properties were found for the alloy cast in a metal die, both with and without modification treatment.
Źródło:
Archives of Foundry Engineering; 2012, 12, 1; 67-70
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure of AlSi skeleton castings
Autorzy:
Cholewa, M.
Szuter, T.
Powiązania:
https://bibliotekanauki.pl/articles/382849.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
odlew szkieletowy
masa formierska
rdzeń
stop aluminium
skeleton casting
moulding sand
core
microstructure aluminum alloy
Opis:
Skeleton castings macrostructure can be shaped in many ways, by choosing an appropriate material of cores and manufacturing technologies. Important factor, which puts foundry techniques over the other technologies of periodic cellular materials, is ability to adjust mechanical properties by changing the microstructure of an alloy from which the casting is made. The influence on the microstructure of the skeleton casting can be implemented by choosing the thermal properties, mainly thermal conductivity factor, of mould and core materials. Macro- and microstructure of skeleton castings with octahedron elementary cells was presented in this paper. The analysis concerns the differences in morphology of eutectic silicone depending on the location of measurements cross sections areas. The use of thermo-insulating material with appropriate properties assures correct fill of mould cavity and homogeneous microstructure on whole volume of skeleton casting. The selection of technological parameters of the casting process if very important as well.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 147-152
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of SiO2 flux on the depth of penetration, microstructure, texture and mechanical behavior of AA6063 T6 aluminum alloy using activated TIG welding
Autorzy:
Kumar, Rajiv
Vettivel, S. C.
Kumar Kansal, Harmesh
Powiązania:
https://bibliotekanauki.pl/articles/2090702.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
depth of penetration
tensile strength texture
stop aluminium
głębokość penetracji
wytrzymałość na rozciąganie
Opis:
Activated tungsten inert gas (ATIG) welding has a good depth of penetration (DOP) as compared to the conventional tungsten inert gas (TIG) welding. This paper is mainly focused on ATIG characterization and mechanical behavior of aluminum alloy (AA) 6063-T6 using SiO2 flux. The characterization of the base material (BM), fusion zone (FZ), heat affected zone (HAZ) and, partially melted zone is carried out using the suitable characterization methods. The weld quality is characterized using ultrasonic-assisted non-destructive evaluation. A-scan result confirms that the ATIG welded samples have more DOP and less bead width as compared to conventional TIG. The recorded tensile strength of ATIG with SiO2 is better than the conventional TIG welding. The failure mode is ductile for ATIG welding with larger fracture edges and is brittle in the case of conventional TIG welding.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136215, 1--8
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Possibilities of Improving the Selected Properties Surface Layer of Butt Joints Made Using the FSW Method
Autorzy:
Bucior, Magdalena
Kluz, Rafał
Kubit, Andrzej
Ochał, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/103057.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
śrutowanie
zgrzewanie tarciowe z przemieszaniem
2024
stop aluminium
shot peening
FSW (friction stir welding)
aluminum alloy
Opis:
The paper presents the results pertaining to an analysis on the influence of technological parameters of pneumatic shot peening technology on the selected properties of a surface layer of butt joints made with Friction stir weld‑ ing (FSW) method. Butt joints made of two 2024‑T3 aluminum alloy sheets with the thickness of 1 mm were shot peened with glass beads. The experiments were carried out according to the statistical 3‑level completed plan PS/DC 32 . The technological parameters were changed in the range: pressure p = 0.4–0.6 MPa and peening time t = 1–3 min. As a result of the conducted research, adequate equations describing the effect of the analyzed parameters on the surface roughness were obtained. Shot peening with glass beads significantly reduced the sur‑ face roughness from Ra = 5.2 µm to Ra = 1.42 µm. This treatment provides high compressive residual stresses and the increase of the surface layer hardness. The results show that shot peening is a highly efficient and cost‑effective mechanical treatment used for improving the mechanical properties of the butt joints made with the FSW method.
Źródło:
Advances in Science and Technology. Research Journal; 2020, 14, 1; 1-9
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Precipitation Hardening of Continuous Ingots of AlSi2Mn and AlCu4MgSi Alloys
Autorzy:
Wróbel, T.
Nuckowski, P. M.
Jurczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/382653.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
precipitation hardening
continuous casting
silicon
cooper
stop aluminium
utwardzanie wydzieleniowe
odlewanie ciągłe
silikon
miedź
Opis:
The paper presents the research results of the influence of the precipitation hardening on hardness and microstructure of selected Al-Si and Al-Cu alloys obtained as ϕ30 mm ingots in a horizontal continuous casting process. The ingots were heat treated in process of precipitation hardening i.e. supersaturation with subsequent accelerated or natural ageing. Moreover in the range of the study it has been carried out investigations of chemical constitution, microscopic metallographic with use of scanning electron microscope with EDS analysis system, and hardness measurements using the Brinell method. On basis of obtained results it has been concluded that the chemical constitution of the investigated alloys enables to classify them into Al alloys for the plastic deformation as EN AW-AlSi2Mn (alternatively cast alloy EN AC-AlSi2MgTi) and as EN AW-AlCu4MgSi (alternatively cast alloy EN AC-AlCu4MgTi) grades. Moreover in result of applied precipitation hardening has resulted in the precipitation from a supersaturated solid solution of dispersive particles of secondary phases rich in alloying element i.e. Si and Cu respectively. In consequence it has been obtained increase in hardness in case of AlSi2Mn alloy by approximately 30% and in case of AlCu4MgSi alloy by approximately 20% in comparison to the as-cast state of continuous ingots.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 181-186
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Shortened Heat Treatment on Change of the Rm Tensile Strength of the 320.0 Aluminum Alloy
Autorzy:
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/381551.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
ATD
heat treatment
tensile strength
stop aluminium
metoda ATD
obróbka cieplna
wytrzymałość na rozciąganie
Opis:
Mechanical and technological properties of castings made from 3xx.x alloys depend mainly on properly performed process of melting and casting, structure of a casting and mould, as well as possible heat treatment. Precipitation processes occurring during the heat treatment of the silumins containing additives of Cu and/or Mg have effect on improvement of mechanical properties of the material, while choice of parameters of solutioning and ageing treatments belongs to objectives of research work performed by a number of authors. Shortened heat treatment, which is presented in the paper assures suitable mechanical properties (Rm), and simultaneously doesn’t cause any increase of production costs of a given component due to long lasting operations of the solutioning and ageing. Results of the research concern effects of the solutioning and ageing parameters on the Rm tensile strength presented in form of the second degree polynomial and illustrated in spatial diagrams. Performed shortened heat treatment results in considerable increase of the Rm tensile strength of the 320.0 alloy as early as after 1 hour of the solutioning and 2 hours of the ageing performed in suitable.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1; 75-78
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction and Wear Behavior of 201HT Cast Aluminum Alloy with Various Competitive Material
Autorzy:
Li, R.
Chen, L. J.
Su, M.
Zeng, Q.
Li, H.
Liu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/382627.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
casting
aluminum alloy
friction and wear
competitive material
odlewanie
stop aluminium
tarcie i zużycie
materiał konkurencyjny
Opis:
The friction and wear properties of 201HT aluminum alloys and the corresponding competitive coupons were tested on an electro-hydraulic servo face friction and wear testing machine (MM-U10G). The microstructures of the competitive coupons were investigated by scanning electron microscopy (SEM) and consequently the corresponding friction and wear mechanisms were studied. The results demonstrated that: (1) the best competitive material of friction and wear performance of the 201HT was the 201HTC. (2) the 201HTC modified by carbon following the initial mill for oil storage of the micro-groove to be produced, increased the corresponding lubrication performance reduced the friction coefficient and wear rate effectively. (3) the 201HT-201HTC could obtain both better friction and wear mainly due to the initial process of grinding following the 201HT plastic deformation occurred in the surface and the formation of a series of re-melting welding points, whereas the 201HT material hardness would be similar to the 201HTC material hardness, which led into the competitive material friction and wear performance improvement.
Źródło:
Archives of Foundry Engineering; 2017, 17, 2; 55-62
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Creep Behaviors at 275 °C for Aluminum-Matrix Nano-composite under Different Stress Levels
Autorzy:
Azadi, M.
Behmanesh, A.
Aroo, H.
Powiązania:
https://bibliotekanauki.pl/articles/2079834.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
nanocomposite
nanoparticles
regression model
creep
stress
stop aluminium
nanokompozyt
nanocząstki
model regresji
pełzanie
naprężenia
Opis:
Aluminum alloys, due to appropriate strength to weight ratio, are widely used in various industries, including automotive engines. This type of structures, due to high-temperature operations, are affected by the creep phenomenon; thus, the limited lifetime is expected for them. Therefore, in designing these types of parts, it is necessary to have sufficient information about the creep behavior and the material strength. One way to improve the properties is to add nanoparticles and fabricate a metal-based nano-composite. In the present research, failure mechanisms and creep properties of piston aluminum alloys were experimentally studied. In experiments, working conditions of combustion engine pistons were simulated. The material was composed of the aluminum matrix, which was reinforced by silicon oxide nanoparticles. The stir-casting method was used to produce the nano-composite by aluminum alloys and 1 wt.% of nanoparticles. The extraordinary model included the relationships between the stress and the temperature on the strain rate and the creep lifetime, as well as various theories such as the regression model. For this purpose, the creep test was performed on the standard sample at different stress levels and a specific temperature of 275 o. By plotting strain-time and strain rate-time curves, it was found that the creep lifetime decreased by increasing stress levels from 75 MPa to 125 MPa. Moreover, by comparing the creep test results of nanoparticle-reinforced alloys and nanoparticle-free alloys, 40% fall was observed in the reinforced material lifetime under 75 MPa. An increase in the strain rate was also seen under the mentioned stress. It is noteworthy that under 125 MPa, the creep lifetime and the strain rate of the reinforced alloy increased and decreased, respectively, compared to the piston alloy. Finally, by analyzing output data by the Minitab software, the sensitivity of the results to input parameters was investigated.
Źródło:
Archives of Foundry Engineering; 2021, 21, 3; 81-89
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hot Deformation Of 6xxx Series Aluminium Alloys
Wysokotemperaturowe odkształcenie stopów aluminium grupy 6xxx
Autorzy:
Mrówka-Nowotnik, G.
Sieniawski, J.
Kotowski, S.
Nowotnik, A.
Motyka, M.
Powiązania:
https://bibliotekanauki.pl/articles/353594.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
hot deformation
microstructural evolution
activation energy
stop aluminium
odkształcenie wysokotemperaturowe
ewolucja mikrostruktury
energia aktywacji
Opis:
The hot deformation behavior of the 6xxx aluminum alloys was investigated by compression tests in the temperature range 100°C-375°C and strain rate range 10−4s−1 and 4×10−4s−1 using dilatometer DIL 805 BÄHR Thermoanalyse equipped with accessory attachment deformation allows the process to execute thermoplastic in vacuum and inert gas atmosphere. Associated microstructural changes of characteristic states of examined alloys were studied by using the transmission electron microscope (TEM). The results show that the stress level decreases with increasing deformation temperature and deformation rate. And was also found that the activation energy Q strongly depends on both, the temperature and rate of deformation. The results of TEM observation showing that the dynamic flow softening is mainly as the result of dynamic recovery and recrystallization of 6xxx aluminium alloys.
Obróbkę cieplno-plastyczną stopów aluminium grupy 6xxx prowadzono w zakresie temperatury 100°C-375°C i prędkości odkształcania 10−4s−1 i 4×10−4s−1 na dylatometrze DIL 805 BÄHR Thermoanalyse wyposażonym w przystawkę odkształceniową umożliwiającą wykonanie procesu odkształcania w próżni i w atmosferze gazu obojętnego. Zmiany mikrostruktury badanych stopów, zachodzące w charakterystycznych stadiach obróbki cieplno-plastycznej, badano za pomocą transmisyjnego mikroskopu elektronowego (TEM). Ustalono, że wielkość naprężenia zmniejsza się wraz ze wzrostem temperatury i wielkości odkształcenia. Również energia aktywacji Q w dużym stopniu zależy zarówno od temperatury jak i prędkości odkształcania. Wyniki obserwacji mikrostruktury TEM wykazały, że dynamiczne mięknięcie materiałów jest głównie wynikiem zachodzących procesów zdrowienia dynamicznego i rekrystalizacji stopu aluminium 6xxx.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2A; 1079-1084
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental study and response surface methodology for investigation of FSP process
Badanie procesu FSP poprzez badania doświadczalne i metodę powierzchni odpowiedzi
Autorzy:
Węglowski, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/139578.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
friction stir processing
aluminum alloy
response surface methodology
proces tarcia z przemieszaniem
stop aluminium
metodologia powierzchni odpowiedzi
Opis:
The article presents the effect of rotational and travelling speed and down force on the spindle torque acting on the tool in Friction Stir Processing (FSP) process. The response surface methodology (RSM) was applied to find a dependence combining the spindle torque acting on the tool with the rotational speed, travelling speed and the down force. The linear and quadratic models with interaction between parameters were used. A better fitting was achieved for a quadratic model. The studies have shown that the increase in rotational speed causes a decrease in the torque while the increase in travelling speed and down force causes an increase in the torque. The tests were conducted on casting aluminium alloy AlSi9Mg. Metallography examination has revealed that the application of FSP process results in a decrease in the porosity in the modified material and microstructure refining in the stir zone. The segregation of Si and Fe elements was evident in the parent material, while in the friction stir processed area this distribution was significantly uniform.
W pracy przedstawiono wpływ prędkości obrotowej i przesuwu narzędzia oraz siły docisku na moment obrotowy działający na narzędzia w procesie tarciowej modyfikacji z mieszaniem materiału (FSP). Do wyznaczenia zależności pomiędzy momentem a prędkościami obrotową i przesuwu oraz siłą docisku wykorzystano metodę powierzchni odpowiedzi. Wykorzystano modele liniowy i kwadratowy uwzględniające interakcje pomiędzy parametrami wejściowymi. Lepsze dopasowanie zapewnił model kwadratowy. Wyniki badań wykazały, iż wzrost prędkości obrotowej narzędzia powoduje zmniejszenie momentu działającego na narzędzie, natomiast wzrost prędkości przesuwu i siły docisku powoduje wzrost momentu. Badania były przeprowadzone na odlewniczym stopie aluminium AlSi9Mg. Badania metalograficzne ujawniły, że zastosowanie procesu FSP powoduje rozdrobnienie ziarna oraz redukcję porowatości w obszarze mieszania. Wyraźna segregacja Si i Fe w materiale rodzimym została wyeliminowana, a rozkład pierwiastków jest bardziej jednorodny.
Źródło:
Archive of Mechanical Engineering; 2014, LXI, 4; 539-552
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of low- and high-cycle fatigue in Al 2024-T4 alloy
Autorzy:
Kłysz, Sylwester
Powiązania:
https://bibliotekanauki.pl/articles/1835549.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
low-cycle fatigue
high-cycle fatigue
2024 aluminum alloy
Manson-Coffin equation
Morrow equation
S-N curves
Opis:
The article presents the results of low- (LCF) and high-cycle fatigue (HCF) analyses of 2024-T4 aluminum alloy which is used in aircraft construction, mainly for highly loaded structural components, including for plating, fuselage frames and rotor blade girders in helicopters. The alloy is used in structures where a high strength-to-weight ratio and high fatigue resistance are required. However, the alloy is poorly weldable and has low corrosion resistance. The tests were performed on hourglass and cylindrical samples with parallel and perpendicular orientation relative to the rolling direction. Samples for analysis were obtained from the production line of PZL-130 Orlik TC-II trainer aircraft. The results of the analysis were described by Manson- -Coffin and Morrow equations.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2020, nr 23(4); 309-321
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three Dimensional Morphology of β-Al5FeSi Intermetallics in AlSi Alloys
Autorzy:
Mikołajczak, P.
Ratke, L.
Powiązania:
https://bibliotekanauki.pl/articles/383272.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
intermetallics
β-Al5FeSi
X-ray tomography
morphology
solidification
stop aluminium
intermetalik
tomografia rentgenowska
Opis:
Iron is the most common and detrimental impurity in casting alloys and has been associated with many defects. The main consequence of the presence or adding of iron to AlSi alloys is the formation Fe-rich intermetallics with especially deleterious β-Al5FeSi. β-Al5FeSi phases are most often called needles on 2D micro sections, whilst platelets in 3D geometry. The x-ray tomography results have demonstrated Fe-rich phases with shapes different from simple forms such as needles or platelets and presented bent and branched phases. β grown as complicated structure of bent and branched intermetallics can decrease feeding ability, strengthen pores nucleation and eutectic colonies nucleation leading to lower permeability of mushy zone and porosity in the castings.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1; 47-50
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication And Mechanical Properties Of A Nanostructured Complex Aluminum Alloy By Three-Layer Stack Accumulative Roll-Bonding
Wytwarzanie i właściwości mechaniczne nanostrukturalnego złożonego stopu aluminium wytworzonego przez walcowanie pakietowe trzech warstw
Autorzy:
Lee, S. H.
Lee, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/351499.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
accumulative roll-bonding (ARB)
aluminum alloy
microstructre
mechanical properties
akumulacyjne walcowanie pakietowe
stop aluminium
mikrostruktura
właściwości mechaniczne
Opis:
A multi-layered complex aluminum alloy was successfully fabricated by three-layer stack accumulative roll bonding(ARB) process. The ARB using AA1050 and AA5052 alloy sheets was performed up to 7 cycles at ambient temperature without lubrication. The specimen processed by the ARB showed a multi-layer aluminum alloy sheet in which two aluminum alloys are alternately stacked. The grain size of the specimen decreased with the number of ARB cycles, became about 350nm in diameter after 7cycles. The tensile strength increased with the number of ARB cycles, after 6c it reached 281MPa which is about twice higher than that of the starting material. The microstructures and mechanical properties of a three-layer AA1050/AA5052 alloy fabricated by the ARB were compared to those of the conventional ARB-processed material.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2B; 1195-1198
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Chemical Composition and Parameters of Heat Treatment on the Mechanical Properties and Electrical Conductivity in Hypoeutectic Aluminium Silicon Alloys
Badania nad wpływem składu chemicznego oraz parametrów obróbki cieplnej na własności mechaniczne i elektryczne stopów aluminium z grupy siluminów podeutektycznych
Autorzy:
Wiecheć, J.
Uliasz, P.
Knych, T.
Piwowarska-Uliasz, M.
Jarosz, R.
Powiązania:
https://bibliotekanauki.pl/articles/381346.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat treatment
aluminum alloy
hypoeutectic silicon alloy
mechanical properties
electrical properties
obróbka cieplna
stop aluminium
silumin podeutektyczny
właściwości mechaniczne
właściwości elektryczne
Opis:
The silumins are the aluminum alloys with the silicon as the main alloy addition. These are one of the most common types of casting alloys based on aluminum. They are widely used in technologies of casting such as sand casting, chill casting or pressure die casting. As their main characteristics we can include: very good castabillity, corrosion resistance, high mechanical properties and good thermal and electrical conductivity. Thanks to all these properties, the cast aluminum alloys have been used in various industries such as: automotive, engineering, heat exchangers or conductive elements. The last application requires a specific conditions of the process and the optimal chemical composition of the alloy, which allows to obtain high values of conductivity. The paper presents a study covering the impact of silicon content and heat treatment parameters on the electrical conductivity and mechanical properties (hardness HB) hypoeutetic silumin alloys such as AlSi11Mg, AlSi7Mg and AlSi5Mg. The aim of the study was to determine the optimal conditions for heat treatment parameters of various alloys providing to the most favorable mechanical and electrical properties.
Siluminy, czyli stopy aluminium z głównym dodatkiem w postaci krzemu, są jednymi z najczęściej stosowanych typów stopów odlewniczych na bazie aluminium. Są one wykorzystywane w szeregu technologiach odlewniczych takich jak: odlewanie piaskowe, kokilowe czy odlewanie nisko lub wysoko ciśnieniowe. Do podstawowych własności tej grupy stopów możemy zaliczyć bardzo dobrą lejność, odporność na działanie środowiska korozyjnego, wysokie własności mechaniczne oraz dobrą przewodność cieplną i elektryczną. Dzięki tym własnościom, główne zastosowanie odlewów z siluminów to przemysł samochodowy, maszynowy, elementy konstrukcyjne, wymienniki ciepła czy elementy przewodzące prąd elektryczny. Ta ostatnia aplikacja wymaga zapewnienia szczególnych warunków procesu technologicznego oraz odpowiedniego składu chemicznego stopu, tak aby uzyskać wysokie wartości przewodnictwa. W pracy przedstawiono badania obejmujące wpływ zawartości krzemu oraz parametrów obróbki cieplnej na przewodność elektryczną i własności mechaniczne (twardość HB) siluminów podeutektycznych typu AlSi11Mg, AlSi7Mg oraz AlSi5Mg. Celem badań było określenie optymalnych warunków obróbki cieplnej poszczególnych stopów umożliwiających uzyskanie najkorzystniejszych własności mechanicznych i elektrycznych.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3 spec.; 179-184
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiaxial fatigue experimental analysis of 6063-T66 aluminum alloy of the base material and the welded material
Autorzy:
Uhríčik, Milan
Kopas, Peter
Palček, Peter
Oršulová, Tatiana
Hanusová, Patrícia
Powiązania:
https://bibliotekanauki.pl/articles/103995.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
multiaxial fatigue
aluminum alloy
fatigue criteria
welding
cyclic loading
zmęczenie wieloosiowe
stop aluminium
kryteria zmęczeniowe
spawanie
obciążenie cykliczne
Opis:
This article deals with determining of fatigue lifetime of aluminum alloy 6063-T66 during by multiaxial cyclic loading. The experiments deal with the testing of specimens for identification of the strain-life behavior of material, the modeling of combined loading and determining the number of cycles to fracture in the region of low-cycle fatigue. Fatigue tests under constant amplitude loading were performed in a standard electromechanical machine with a suitable gripping system. Based on the experimental results the fatigue design curves are compared to the fatigue data from the base material and the welded material and also multiaxial fatigue models, which are able to predict fatigue life at different loads.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 334-341
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Próby technologiczne gięcia wyciskanych rur ze stopu aluminium AW-6082
Technological bending trials of tubes extruded from AW-6082 aluminum alloy
Autorzy:
Borowski, J.
Andrzejewski, D.
Płaczek, G.
Jurczak, H.
Leśniak, D.
Powiązania:
https://bibliotekanauki.pl/articles/212169.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Tematy:
stop aluminium
AW-6082
profil wyciskany
próba zginania
próba rozpęczania
aluminum alloy
extruded shapes
bending test
expanding test
Opis:
W pracy przedstawiono wyniki badań wyciskanych cienkościennych (grubość ścianki ok. 1,2 mm) kształtowników zamkniętych ze stopu AW-6082. Kształtowniki wyciskano metodą wyciskania zgrzewającego, za pomocą 6-otworowych matryc. Badaniom poddano profile chłodzone na wybiegu prasy w trojaki sposób: natryskiwanie wodą, chłodzenie wodą, czyli tzw. „fala wodna”, oraz nadmuchem powietrza. Opracowano metodykę badań pozwalającą dokonać oceny zdolności wyciskanych kształtowników do plastycznego kształtowania głównie poprzez gięcie i rozpęczanie. Stop AW-6082 jest stopem trudniejszym do wyciskania od stopów typu 6063 czy 6060, ponieważ wyższa wytrzymałość i mniejsza plastyczność utrudnia uzyskiwanie ścianek o małej grubości jak i dużej prędkości wyciskania. Jak wykazały wcześniejsze badania, profile takie osiągają bardzo dobre właściwości wytrzymałościowe sięgające Rm = 340 MPa, ale charakteryzują się ograniczoną zdolnością do odkształceń plastycznych. W pracy przedstawiono wyniki próby zginania, wyboczenia, rozpęczania oraz gięcia na maszynie trójrolkowej. Stwierdzono, że maksymalna siła ściskająca wyznaczona w próbie wyboczenia odcinka o długości 650 mm, która wskazuje największą wytrzymałość na wyboczenie, odnosi się do profili chłodzonych na wybiegu prasy po wyciskaniu za pomocą tzw. „fali wodnej”. Te profile charakteryzowały się również największą strzałką ugięcia w próbie trójpunktowego zginania. Zwiększona plastyczność i zdolność do odkształceń plastycznych tych profili została potwierdzona w próbie roztłaczania stożkiem, gdzie wartości względnego odkształcenia były o 35% większe niż w przypadku profili chłodzonych za pomocą nadmuchu powietrza czy natrysku wodnego. W wyniku badań metalograficznych stwierdzono, że inicjacja pęknięć w próbie roztłaczania następuje w miejscach zgrzewów profili i w tych obszarach zauważono zwiększoną wielkość ziarna.
This paper presents the results of tests conducted on extruded, thin-walled (wall thick-ness approx. 1.2 mm) closed shapes made of AW-6082 alloy. Shapes were extruded using the bonding extrusion method, by means of 6-hole dies. Sections cooled in three ways at the exit from the press were tested: water spraying, water cooling with a so-called “water wave” and air blowing. A methodology of testing was developed, allowing for assessment of the plastic formability of extruded shapes, mainly through bending and expanding. AW-6082 alloy is more difficult to extrude than 6063 or 6060 alloys, since its higher strength and lower plasticity make it difficult to obtain walls of low thickness and high extrusion rate. As demonstrated in previous studies, such shapes achieve very good strength properties, reaching up to Rm = 340 MPa, but they are characterized by limited plastic formability. This paper presents the results of bending, buckling, expanding and flexion tests on a three-roll machine. It was determined that the maximum compressive force determined in the buckling test of a segment 650 mm in length, indicating the greatest resistance to buckling, corresponds to shapes cooled by means of a so-called “water wave” on the coasting of the press. These shapes were also characterized by the greatest deflection in the three-point bending test. The elevated plasticity and plastic formability of these shapes was confirmed in a cone expansion test, where relative deformation values were 35% greater than in the case of shapes cooled by air blowing or water spraying. Metallographic examinations revealed that crack initiation in the expansion test occurs at welds in shapes, and enlarged grain size was observed in these areas.
Źródło:
Obróbka Plastyczna Metali; 2018, 29, 1; 97-108
0867-2628
Pojawia się w:
Obróbka Plastyczna Metali
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of T6 Heat Treatment Parameters on Technological Quality of the AlSi7Mg Alloy
Autorzy:
Pezda, J.
Jarco, A.
Powiązania:
https://bibliotekanauki.pl/articles/383288.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat treatment
aluminum alloy
tensile strength
elongation
impact strength
obróbka cieplna
stop aluminium
wytrzymałość na rozciąganie
wydłużenie
udarność
Opis:
Very well-known advantages of aluminum alloys, such as low mass, good mechanical properties, corrosion resistance, machining-ability, high recycling potential and low cost are considered as a driving force for their development, i.e. implementation in new applications as early as in stage of structural design, as well as in development of new technological solutions. Mechanical and technological properties of the castings made from the 3xx.x group of alloys depend mainly on correctly performed processes of melting and casting, design of a mould and cast element, and a possible heat treatment. The subject-matter of this paper is elaboration of a diagrams and dependencies between parameters of dispersion hardening (temperatures and times of solutioning and ageing treatments) and mechanical properties obtained after heat treatment of the 356.0 (EN AC AlSi7Mg) alloy, enabling full control of dispersion hardening process to programming and obtaining a certain technological quality of the alloy in terms of its mechanical properties after performed heat treatments. Obtained results of the investigations have enabled obtainment of a dependencies depicting effect of parameters of the solutioning and ageing treatments on the mechanical properties (Rm, A5 and KC impact strength) of the investigated alloy. Spatial diagrams elaborated on the basis of these dependencies enable us to determine tendencies of changes of the mechanical properties of the 356.0 alloy in complete analyzed range of temperature and duration of the solutioning and ageing operations.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 95-100
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fatigue characteristics of materials used in transport industry applications
Autorzy:
Belan, Juraj
Kuchariková, Lenka
Mazur, Magdalena
Tillová, Eva
Chalupová, Mária
Powiązania:
https://bibliotekanauki.pl/articles/88678.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
fatigue properties
Inconel alloy
aluminum alloy
fatigue fracture
transportation safety
właściwości zmęczeniowe
stop Inconel
stop aluminium
pęknięcie zmęczeniowe
próba zmęczeniowa
bezpieczeństwo transportu
Opis:
Designers have a major interest about fatigue properties of materials used in transport industry. Each component in transport works under alternating stress. From this point of view the fatigue properties are important for single parts lifetime resulting into safety of whole components as cars and airplanes what leads to safety on the roads or air and have influence on human life as well. Therefore this paper deals with fatigue properties of wrought Inconel alloy IN 718 and aluminum cast alloy AlSi9Cu3. Both materials were put on fatigue push – pull test, but Ni – based IN 718 alloy at frequency of loading around 20 000 kHz (High Frequency High Cycles Fatigue) and aluminum alloy AlSi9Cu3 at frequency of loading around 80 Hz (Low Frequency High Cycles Fatigue). These parameters were chosen with respect of usage such materials for production of components used in transport industry applications. Results after fatigue tests are presented as Wohler curve. For prediction of source of fracture the SEM fractography analysis of fatigue fracture surfaces was made.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 810-818
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka i wykorzystanie stopów aluminium oraz taśm węglowych w budownictwie
Characteristics and use of aluminum alloys and carbon tape construction
Autorzy:
Kwiatkowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2068186.pdf
Data publikacji:
2011
Wydawca:
Politechnika Częstochowska
Tematy:
budownictwo
aluminium
stop aluminium
taśma węglowa
włókno węglowe
właściwości mechaniczne
wzmacnianie
civil engineering
aluminum
aluminum alloy
carbon tape
carbon fibre
mechanical properties
strengthening
Opis:
Tematem niniejszej pracy jest omówienie materiałów, jakimi są aluminium i taśmy węglowe. W artykule zostały przedstawione najważniejsze właściwości mechaniczne aluminium i taśm z włókna węglowego oraz wykorzystanie tych produktów w budownictwie.
The subject of this article are the most important mechanical properties of aluminum and carbon fiber strips and their usage in constructions. Aluminium and iron were compared interms of physical the most commonly used aluminium alloys. The study also shows a process for producing carbon tape, main their advantages and use in strengthening and stability of engineering structures.
Źródło:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2011, 17 (167); 112-118
0860-7214
Pojawia się w:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigation of mechanical behavior of cracked cruciform specimens in aluminum alloy 6082-T6 subjected to different biaxial loading conditions
Autorzy:
Khelil, Foudil
Aour, Benaoumeur
Talha, Abderrahim
Benseddiq, Noureddine
Powiązania:
https://bibliotekanauki.pl/articles/281224.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
fracture mechanics
6082-T6 aluminum alloy
cruciform specimen
finite element analysis
stress intensity factor
T-stress
biaxiality
Opis:
Analysis of cracked cruciform specimens under biaxial loading conditions is very important and closer to reality in the study of behavior of marine, naval, aeronautical and railway structures. The aim of this work is to examine the evolution of fracture parameters in a combined mixed mode of an aluminum alloy A6082-T6 cruciform specimen as a function of the biaxial loading with different ratios. To this end, the effects of main parameters, such as load ratio, crack length, crack orientation and non-proportional loading coefficient have been analyzed and discussed in order to highlight fracture toughness of the studied material. The results show that the finite element method is a useful tool for calculation of crack characteristics in the mechanics of biaxial fracture. According to the obtained results, a non-proportional evolution of the fracture parameters, namely, the SIFs KI and KII , T-stress, and the biaxiality parameter was observed. Indeed, the latter depends considerably on the crack length, the angle of crack orientation and the applied biaxial loading. Detailed concluding remarks are presented at the end of this work.
Źródło:
Journal of Theoretical and Applied Mechanics; 2019, 57, 4; 1021-1037
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Etching Method to Create Random Speckle Pattern on Semi-Solid Cast A356 Aluminium for DIC in-situ strain measurement
Autorzy:
Sergolle, M.
Santos, J.
Kasvayee, K. A.
Jarfors, A. E. W.
Powiązania:
https://bibliotekanauki.pl/articles/106925.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
random speckle pattern
cast semi-solid aluminum alloy
pit etching
pitting corrosion
Digital Image Correlation (DIC)
local strain
Opis:
Aluminum semi-solid casting is constantly evolving, as it offers a combination of reduced shrinkage porosity and gas entrapment defects together with high productivity and an extended die-life. The relationship between the microstructure and stress-strain behavior is not well-understood due to its non-conventional microstructure. In-situ tensile testing, combined with optical microscope and Digital Image Correlation (DIC), has been used for local strain distribution measuements in cast irons. The critical capability was an etching technique to generate a micro-scale random speckle pattern with a sufficiently high speckle density to enable the sufficient spatial resolution of displacement and strain. The current paper focuses on the development of a pit etching procedure for the semi-solid cast A356 aluminum alloy to study local strain accommodation on the microstructure during tensile loading. The critical challenge of this procedure was the generation of homogeneously distributed pits on both the primary aluminum and eutectic regions. Therefore, a heated solution used for wet-etch aluminum in microfabrication was modified as well as a process adapted to generate pits with suitable characteristics. In-situ tensile tests were performed attached to an optical microscope to record the microstructure and displacements during loading. DIC software was used for analysis. The procedure was validated through a comparison between the resulting Young´s moduls using standard tensile testing and the DIC process on the speckle pattern generated. A good fit between the two methods for Young´s modulus was found. The spatial resolution obtained was, however, not sufficient to fully resolve the strain gradients in the microstructure, but it did reveal large strain variations in the microstructure.
Źródło:
Journal of Casting & Materials Engineering; 2017, 1, 1; 33-38
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Criteria of maintenance for assessing the suitability of aluminum alloys for the production of interchangeable parts injection mold
Eksploatacyjne kryteria oceny przydatności stopów aluminium do produkcji wymiennych części form wtryskowych
Autorzy:
Greškovič, F.
Dulebová, L.
Duleba, B.
Krzyżak, A.
Powiązania:
https://bibliotekanauki.pl/articles/1366207.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
injection mould
aluminum alloy
friction pairs
adhesive wear
friction coefficient
wtryskiwanie
stopy aluminium
pary cierne
zużycie adhezyjne
współczynnik tarcia
Opis:
With increasing production of plastics crop up also the need to improve their processing abilities. New methods and materials in the construction of forms are examined. Low weight and easy machinability predestines aluminium alloys for use as a material for the production of injection moulds for manufacturing of small series production. The paper deals with the verification of the suitability for selected aluminium alloys for the production of mould inserts based on problem, which occurred at real injection mould used for small series production. Massive wear of material at contact of ejector pin made from 1.1203 and insert made of Al-alloy caused deformations at final moulding. At next experiments were four types of Al alloys used. At following materials hardness and wear of materials was evaluated. To simulate the adhesive wear of friction pairs 1.1203 - Al alloy with and without greasing was adhesive wear test machine AMSLER used with simulation of surface contact. Wear intensity was evaluated by the coefficient of friction.
Z powodu zwiększenia produkcji różnorodnych elementów z tworzyw polimerowych zauważana jest konieczność poprawiania procesów przetwórczych, w tym konstrukcji maszyn i narzędzi do ich przetwórstwa. Dlatego badane są nowe metody i materiały w budowie form używanych w procesie wtryskiwania. Niska waga i dobra obrabialność stopów aluminium sprawiają, że materiały te są chętnie stosowane w produkcji form wtryskowych do produkcji małoseryjnej. Artykuł dotyczy weryfikacji przydatności wybranych stopów aluminium do produkcji wymiennych części form wtryskowych pod kątem zapewnienia jak najdłuższej prawidłowej eksploatacji narzędzi. Zagadnienie przedstawione w artykule dotyczy rzeczywistych problemów, które wystąpiły w formach wtryskowych stosowanych do produkcji krótkich serii. Występujące znaczne zużycie materiału na styku wypychacza wykonanego ze stali 1.1203 i części formy wykonanej ze stopów aluminium, oraz deformacje stopu aluminium wpływają na jakość przedmiotów produkowanych z tworzyw polimerowych. W kolejnych eksperymentach przetestowano cztery rodzaje stopów Al. Wyznaczono twardość materiałów i zużycie ścierne. Aby symulować współpracę węzłów tarcia 1.1203 – Al przeprowadzono testy z i bez użycia środka smarnego za pomocą urządzenia AMSLER.
Źródło:
Eksploatacja i Niezawodność; 2013, 15, 4; 434-440
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development and optimization of casting technology on part of the suspension of a heavy vehicle used in difficult environmental wetland conditions
Opracowanie oraz optymalizacja konstrukcji odlewu wahacza maszyny ciężkiej pracującej w trudnych warunkach środowiska wodno-błotnego
Autorzy:
Małysza, M.
Żuczek, R.
Pysz, S.
Gil, A.
Wieliczko, P.
Kowalski, P.
Wańczyk, K.
Powiązania:
https://bibliotekanauki.pl/articles/391765.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
ICME
simulation
aluminum alloy
rapid prototyping
casting optimization
zintegrowane projektowanie (ICME)
symulacja komputerowa
stopy aluminium
szybkie prototypowanie
optymalizacja odlewu
Opis:
The development of a new element is a very complex procedure requiring a combination of many factors related to the design and manufacture phases. The most efficient way is to use computer simulation which allows for verification of the whole design and production process. Over the years, the development of computer technologies has allowed for the development of an Integrated Computational Material Engineering (ICME). This method in logical sequence makes it possible to integrate the project activities, to develop new manufacturing methods, to select suitable materials and to verify the final process. Such multi-threaded operations significantly shorten the time required for the production of the prototype which speeds up the implementation of the planned production of the designed casting. The additional advantage of such work is the possibility of ongoing monitoring of the changes and their impact on the final product.
Opracowanie nowej konstrukcji jest bardzo skomplikowaną procedurą wymagającą połączenia wielu zazębiających się kroków projektowych połączonych z przesłankami technologicznymi wybranej metody wytwarzania. Obowiązujące trendy projektowania uwzględniają wykorzystanie symulacji komputerowej, która znajduje zastosowanie w ocenie założeń konstrukcyjnych oraz analizę numeryczną zjawisk występujących w trakcie wytwarzania. Wieloletni rozwój takiego podejścia pozwolił na stworzenie zintegrowanego systemu projektowania z ang. Integrated Computational Material Engineering (ICME). Ogólna charakterystyka metody polega na utworzeniu logicznego ciągu przyczynowo-skutkowego projektowania, doboru materiału i weryfikacji procesu wykonywania oraz eksploatacji. Takie wielowątkowe podejście pozwala na znaczące skrócenie czasu wymaganego do przygotowania produkcji funkcjonalnego prototypu, a następnie wprowadzenie go do testów przemysłowych. Niewątpliwą zaletą jest możliwość ciągłego monitorowania zmian konstrukcyjnych i technologicznych oraz ich wpływ na efekt końcowy produktu.
Źródło:
Prace Instytutu Odlewnictwa; 2016, 56, 4; 363-368
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Various Types of Heat Treatment on Mechanical Properties of the EN AC-AlSi6Cu4 Alloy
Autorzy:
Jarco, A.
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/382485.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat treatment
aluminum alloy
ATD method
elongation
tensile strength
obróbka cieplna
stop aluminium
metoda ATD
wydłużenie
wytrzymałość na rozciąganie
Opis:
The Al-Si-Cu alloys with content of the copper from 2 to 4 percent, after solutioning and artificial ageing treatments (T6 heat treatment), feature high strength and very high hardness, however their elongation is considerably reduced. Maintaining value of elongation on the level of initial alloy is possible due to homogenizing treatment performed prior the T6 treatment. Performed strength tests of the initial alloy and the alloy after individual types of the heat treatment enable comparison of obtained results and assessment of usability of the investigated alloy to production of a castings. Test pieces to the strength tests were poured in standardized metal moulds. Parameters of the heat treatment, temperature and duration of heating were established on base of the literature and the ATD diagram performed for the investigated alloy. Investigated EN AC-AlSi6Cu4 alloy after homogenizing treatment becomes plastic, its elongation A5 and its impact strength KC increase nearly three times, with slight decrease of the tensile strength Rm. Dispersion hardening in connection with the homogenizing treatment results in increase of the tensile strength Rm with 68%, hardness and impact strength with 40% with elongation at level of the alloy without heat treatment. Making suitable selection of various types of the heat treatment it is possible, depending on needs, to control mechanical properties of the alloy.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 35-38
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction and Wear Properties of Plasma Sprayed YSZ/Ni-Cr-Al Coated 6063-T6 Aluminum Alloy
Autorzy:
Erzi, E.
Dispinar, D.
Yilmaz, S.
Powiązania:
https://bibliotekanauki.pl/articles/383089.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
mechanical properties
abrasive wear
plasma spraying
YSZ coating
stop aluminium
właściwości mechaniczne
zużycie ścierne
natryskiwanie
powłoka YSZ
Opis:
In this study T6 heat treated 6063 aluminum alloys were used as substrate material. In order to form a bond between the substrate and the main coating, all samples were coated with Ni-Cr-Al powders. 8 wt% Yttria Stabilized Zirconia powders (YSZ) were coated with plasma spray technique. Thickness of YSZ was 150 m and bond coating was 36 m. XRD and SEM-EDS analyses were performed to characterize the coating layers. These YSZ coated and uncoated samples were subjected to wear testing under different spindle speed, loading and working distance. Wear test results were compared with the kinetic friction coefficients and weight loss values. Wear marks on YSZ coated and uncoated samples were investigated by SEM analysis. By coating with plasma spray technique, the wear resistance of Al alloys was increased without changing the friction coefficient. It was found that spindle speed had significant effect over the wear properties than the load applied. By YSZ coating, wear properties were increased 10 times.
Źródło:
Archives of Foundry Engineering; 2017, 17, 3; 168-174
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Sand Fluidization on Structure and Properties of Aluminum Lost Foam Casting
Autorzy:
Kaliuzhnyi, P.
Powiązania:
https://bibliotekanauki.pl/articles/380477.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
lost foam casting
aluminum alloy
sand fluidization
innowacyjne technologie odlewnicze
metoda traconej piany
stop aluminium
fluidyzacja
Opis:
The article presents investigation results of the effect of sand fluidization on the structure and mechanical properties of AlSi9 aluminum alloy. Castings were made by lost foam casting process with sand fluidization in mold at the stages of their solidification and cooling. Sand fluidization was achieved by blowing sand bed with compressed air in a foundry container. The metallographic study was carrying out on samples cut from different sections of the castings. Mechanical properties were determined on specimens made from cast samples. Microstructural analysis showed that sand fluidization increases the cooling rate, as a result, the main microstructural components of the alloy – SDAS, eutectic silicon and needles of the rich-iron phase – decrease. Moreover, in different sections of the casting structure is more uniform. With an increasing the air flow rate, a greater refinement of the structure is observed. Through the use of sand fluidization, the mechanical properties of LFC aluminum alloys increase to the level of gravity die castings.
Źródło:
Archives of Foundry Engineering; 2020, 20, 1; 122-126
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of FEM and Vision-Based Methods to Analysis of Shearing Processes in the Aspect of Scrap Reduction
Zastosowanie metody elementów skończonych i technik wizyjnych do analizy procesów cięcia w aspekcie redukcji odpadu
Autorzy:
Bohdal, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/1818561.pdf
Data publikacji:
2015
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
cutting
aluminum alloy
scrap
finite element method
vision based solutions
cięcie
stop aluminium
odpad
metoda elementów skończonych
techniki wizyjne
Opis:
Współczesne techniki wytwarzania nie są pozbawione problemów związanych z zapewnieniem odpowiedniej jakości wytwarzanych elementów przy jednoczesnej minimalizacji kosztów ich produkcji jak i wzroście wydajności procesu. W pracy przedstawiono możliwości zastosowania Metody Elementów Skończonych i technik wizyjnych do analizy zjawisk fizycznych zachodzących podczas procesów cięcia. Jednym z czynników ograniczających prawidłowy przebieg procesu cięcia są defekty na powierzchni przecięcia w postaci zadziorów i wiórów. Powoduje to niedokładne przyleganie blach, a w przypadku konieczności składania ich w pakiecie stanowi przeszkodę w prawidłowym montowaniu elementów ciętych w układach mechanicznych lub elektrycznych. Rozwiązanie tego problemu jest jednym z kluczowych zadań tej technologii, a jednym ze stosowanych sposobów jest analiza symulacyjna i doświadczalna poszczególnych faz procesu cięcia. Wyniki analiz mogą być wykorzystane do projektowania procesu cięcia, a także być podstawą doboru parametrów procesu w aspekcie jakości technologicznej wyrobu. Pozwoli to na podniesienie ich jakości i zmniejszenie odpadów materiałowych. Spowoduje to bezpośrednio zmniejszenie zużycia energii i przyczyni się do ograniczenia negatywnego wpływu tego procesu na otaczające środowisko.
Źródło:
Rocznik Ochrona Środowiska; 2015, Tom 17, cz. 1; 90-103
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat treatment of AlZn10Si7MgCu alloy and its effect on change of mechanical properties
Autorzy:
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/382847.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
obróbka cieplna
stop aluminium
metoda ATD
starzenie naturalne
właściwości mechaniczne
heat treatment
aluminum alloy
ATD method
natural ageing
mechanical properties
Opis:
The most important parameters which predetermine mechanical properties of a material in aspects of suitability for castings to machinery components are: tensile strength (Rm), elongation (A5, hardness (HB) and impact strength (KCV). Heat treatment of aluminum alloys is performed to increase mechanical properties of the alloys mainly. The paper comprises a testing work concerning effect of heat treatment process consisting of solution heat treatment and natural ageing on mechanical properties and structure of AlZn10Si7MgCu alloy moulded in metal moulds. Investigated alloy was melted in an electric resistance furnace. Run of crystallization was presented with use of thermal-derivative method (ATD). This method was also implemented to determination of heat treatment temperature ranges of the alloy. Performed investigations have enabled determination of heat treatment parameters' range, which conditions suitable mechanical properties of the investigated alloy. Further investigations will be connected with determination of optimal parameters of T6 heat treatment of the investigated alloy and their effect on change of structure and mechanical/technological properties of the investigated alloy.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 135-138
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-ray tomography investigation of Fe-rich intermetallics in AlSi alloys
Autorzy:
Mikołajczak, P.
Ratke, L.
Powiązania:
https://bibliotekanauki.pl/articles/381463.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
intermetallics
β-Al5FeSi
X-ray tomography
melt flow
stop aluminium
związek międzymetaliczny
tomografia rentgenowska
szybkość przepływu
Opis:
Iron exists as a common impurity element in AlSi foundry alloys. The main consequence of the presence or adding of iron to AlSi alloys is the formation Fe-rich intermetallics with especially deleterious β-Al5FeSi. This work aims to identify the role of fluid flow on the microstructure and intermetallics in Al-9 wt.% Si-0.2/0.5/1.0 wt.% Fe alloys directionally solidified under defined thermal and fluid flow conditions and extensively uses 3D x-ray tomography to get a better insight into their morphology and formation. The results have revealed the growth of larger and more dense β-Al5FeSi intermetallics in the specimen centre as an effect of forced flow. The reconstructions confirmed that the course of number density at the specimen cross section increases from the specimen edge to its centre.
Źródło:
Archives of Foundry Engineering; 2013, 13, 4; 79-82
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and Casting Process of Aluminum Alloy Multi-Way Valve Body with Various Gating Systems
Autorzy:
Rong, L.
Lunjun, C.
Ming, S.
Qi, Z.
Yong, L.
Heng, W.
Powiązania:
https://bibliotekanauki.pl/articles/381887.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
casting process
aluminum alloy
valve body
gating system
simulation analysis
proces odlewniczy
stop aluminium
korpus zaworu
układ wlewowy
analiza symulacji
Opis:
In order to study the effects of various gating systems on the casting of a complex aluminum alloyed multi-way valve body, both software simulation analysis and optimization were carried out. Following, the aluminum alloyed multi-way valve body was cast to check the pouring of the aluminum alloy valve body. The computer simulation results demonstrated that compared to the single side casting mode, the casting method of both sides of the gating system would reduce the filling of the external gas, while the air contact time would be lower. Adversely, due to the pouring on both sides, the melt cannot reach at the same time, leading to the liquid metal speed into the cavity to differ, which affected the liquid metal filling stability. The riser unreasonable setting led to the solidification time extension, resulting in a high amount of casting defects during solidification. Also, both gating systems led the entire casting inconsequential solidification. To overcome the latter problems, a straight gate was set at the middle pouring and the horizontal gate diversion occurred on both sides of pouring, which could provide better casting results for the aluminum alloyed multi-valve body.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 84-94
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Friction and Wear Characteristics of Aluminum Alloy Hydraulic Valve Body and Its Antiwear Mechanism
Autorzy:
Rong, L.
Lunjun, Ch.
Ming, Su
Qi, Z.
Yong, Liu
Powiązania:
https://bibliotekanauki.pl/articles/382468.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
hydraulic valve body
oil leakage
friction and wear
stop aluminium
korpus zaworu hydraulicznego
wycieki oleju
tarcie i zużycie
Opis:
In order for the working status of the aluminum alloyed hydraulic valve body to be controlled in actual conditions, a new friction and wear design device was designed for the cast iron and aluminum alloyed valve bodies comparison under the same conditions. The results displayed that: (1) The oil leakage of the aluminum alloyed hydraulic valve body was higher than the corresponding oil leakage of the iron body during the initial running stage. Besides during a later running stage, the oil leakage of the aluminum alloyed body was lower than corresponding oil leakage of the iron body; (2) The actual oil leakage of different materials consisted of two parts: the foundation leakage that was the leakage of the valve without wear and wear leakage that was caused by the worn valve body; (3) The aluminum alloyed valve could rely on the dust filling furrow and melting mechanism that led the body surface to retain dynamic balance, resulting in the valve leakage preservation at a low level. The aluminum alloy modified valve body can meet the requirements of hydraulic leakage under pressure, possibly constituting this alloy suitable for hydraulic valve body manufacturing.
Źródło:
Archives of Foundry Engineering; 2017, 17, 1; 207-215
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of selected Friction Stir Welding parameters on mechanical properties of joints
Wpływ wybranych parametrów zgrzewania tarciowego na właściwości mechaniczne spoiny
Autorzy:
Kossakowski, P. G.
Wciślik, W.
Bakalarz, M.
Powiązania:
https://bibliotekanauki.pl/articles/230429.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zgrzewanie tarciowe z przemieszaniem
FSW
stop aluminium
parametr mechaniczny
mikrostruktura materiału
friction stir welding
aluminum alloy
mechanical properties
material microstructure
Opis:
The article discusses the basic issues related to the technology of friction stir welding (FSW). A short description of technology is provided. The following section provides the analysis of effect of technological parameters (tool rotation and welding speed) on the mechanical properties of the prepared joint (strength, ductility, microhardness). In both cases the analysis refers to aluminum alloys (6056 and AA2195-T0). The comparative analysis showed the phenomenon of the increase in weld strength along with the increase in the rotational speed of the tool during welding. Similarly, with the increase in welding speed, an increase in weld strength was observed. Some exceptions have been observed from the above relations, as described in the article. In addition, examples of material hardness distribution in the joint are presented, indicating their lack of symmetry, caused by the rotational movement of the tool. The analyses were performed basing on the literature data.
W artykule przedstawiono podstawowe zagadnienia związane z wpływem wybranych parametrów technologii zgrzewania tarciowego (prędkość obrotowa i liniowa narzędzia) na właściwości mechaniczne gotowej spoiny, ze szczególnym uwzględnieniem zależności naprężenie-odkształcenie i twardości materiału.
Źródło:
Archives of Civil Engineering; 2019, 65, 4; 51-62
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Lubricants on Wear Resistance of Aluminum Alloy Strips Series 2XXX
Wpływ środków smarnych na odporność na zużycie blach ze stopu aluminium serii 2XXX
Autorzy:
Żaba, K.
Kita, P.
Nowosielski, M.
Kwiatkowski, M.
Madej, M.
Powiązania:
https://bibliotekanauki.pl/articles/355647.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lubricants
wear resistance
aluminum alloy strips series 2XXX
smary
odporność na zużycie
blachy ze stopu aluminium serii 2XXX
Opis:
The article presents a properly planned and designed tests of the abrasive wear resistance 2024 aluminum alloy strips under friction conditions involving various lubricants. Test were focused on the selection of the best lubricant for use in industrial environment, especially for sheet metal forming. Three lubricants of the Orlen Oil Company and one used in the sheet metal forming industry, were selected for tests. Tests without the use of lubricant were performed for a comparison. The tester T-05 was used for testing resistance to wear. As the counter samples were used tool steel - NC6 and steel for hot working - WCL, which are typical materials used for tools for pressing. The results are presented in the form of the force friction, abrasion depth, weight loss and coefficient of friction depending on the lubricant used and the type of counter samples. The results allowed for predicting set lubricant-material for tools which can be applied to sheet metal made of aluminum alloy 2024.
W artykule przedstawiono wyniki badań odporności na zużycie blach ze stopu aluminium serii 2024 w różnych warunkach smarowania. Badania były ukierunkowane na wybór najlepszego środka smarnego do zastosowania w warunkach przemysłowych, przede wszystkim do tłoczenia blach. Do badań wytypowano trzy środki smarne firmy Orlen Oil oraz jeden środek smarny stosowany w przemyśle do tłoczenia blach. Dla porównania wykonano również badania bez użycia środka smarnego. Do badań odporności na zużycie wykorzystano tester T-05. Jako materiały przeciwpróbek zastosowano stal narzędziową NC6 oraz stal do pracy na gorąco WCL, będące typowymi materiałami wykorzystywanymi na narzędzia do tłoczenia. Wyniki badań przedstawiono w postaci zależności siły tarcia, głębokości wytarcia, ubytku masy i współczynnika tarcia od zastosowanego środka smarnego i rodzaju przeciwpróbki. Wyniki badań pozwoliły na wytypowanie najlepszego, spośród badanych, zestawu środek smarny-materiał na narzędzia, do tłoczenia blach ze stopu aluminium z gatunku 2024.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3A; 1833-1837
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elevated-temperature tensile deformation and fracture behavior of particle-reinforced PM 8009Al matrix composite
Autorzy:
Chen, Shuang
Chen, Guoqiang
Gao, Pingping
Liu, Chunxuan
Wu, Anru
Dong, Lijun
Huang, Zhonghua
Ouyang, Chun
Zhang, Hui
Powiązania:
https://bibliotekanauki.pl/articles/2173538.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum matrix composite
aluminum alloy 8009
elevated-temperature tensile property
interface
fracture behavior
kompozyt z osnową aluminiową
stop aluminium 8009
właściwość rozciągania w podwyższonej temperaturze
zachowanie pęknięć
Opis:
Tensile tests of 8009Al alloy reinforced with SiC and Al₂O₃ particles fabricated by powder metallurgy (PM) were conducted at temperatures of 250–350°C and strain rates of 0.001–0.1 s⁻¹. The ultimate tensile strength and yield strength of the samples decreased while the temperature and strain rate increased. The elongation slightly decreased at first and then increased with growing temperature because of the medium-temperature brittleness of the alloy matrix. When the strain rate was 0.1 s⁻¹, the elongation of the 8009Al/Al₂O₃ composites always decreased with an increase in temperature because of the poorly coordinated deformation and weak bonding between the matrix and Al₂O₃ particles at such a high strain rate. The work-hardening rates of the composites sharply increased to maxima and then decreased rapidly as the strain increased. Meanwhile, the 8009Al/SiCₚ composites displayed superior UTS, YS, elongation, and work-hardening rates than those of the 8009Al/Al₂O₃ composites under the same conditions. Compared to 8009Al alloys reinforced with spherical Al₂O₃ particle, 8009Al alloys reinforced with irregular SiC particles exhibited a better strengthening effect. The fracture mechanism of the 8009Al/SiCₚ composites was mainly ductile, while that of the 8009Al/Al₂O₃ composites was primarily debonding at the matrix–particle interfaces in a brittle mode.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 5; e138846, 1--8
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of oxide layers made on aluminum alloy 7075 by different methods
Charakterystyka warstw tlenkowych wytworzonych na stopie aluminium 7075 z zastosowaniem różnych metod
Autorzy:
Jędrusik, M.
Dębowska, A.
Kopia, A.
Petrzak, P.
Koclęga, D.
Kalemba-Rec, I.
Powiązania:
https://bibliotekanauki.pl/articles/263954.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
oxide layers
aluminum alloy 7075
micro-arc oxidation
phosphate coating
chemical method
warstwy tlenkowe
stop aluminium 7075
MAO
fosforanowanie
metoda chemiczna
Opis:
Aluminum and aluminum alloys are now being widely used as materials for structural applications due to a number of valuable properties. Improvement in the functional and decorative properties of aluminum can be obtained by forming an oxide layer on its surface. The aim of the present study was to produce and compare the properties of oxide layers on the surface of aluminum alloy 7075 and compare their properties. The methods that were used during the study were as follows: phosphating, micro-arc oxidation, and a chemical method involving the formation of a passive layer. The layers were subjected to corrosion tests. SEM and EDS methods were used for characterization of the received results. Also, some tests on an optical profilometer were done. It was proven that the micro-arc oxidation method allowed us to obtain a layer with the greatest thickness and highest corrosion resistance.
Glin i jego stopy są obecnie powszechnie wykorzystywanym materiałem do zastosowań konstrukcyjnych ze względu stosunek masy do wytrzymałości. Poprawę własności funkcyjnych i dekoracyjnych aluminium uzyskać można przez wytworzenie warstwy tlenku na jego powierzchni. Celem badań było wytworzenie warstw tlenkowych na podłożu ze stopu aluminium 7075 i porównanie ich właściwości. Zastosowano trzy metody: fosforanowanie, micro-arc oxidation oraz metodę chemiczną polegającą na wytworzeniu warstwy pasywnej. Otrzymane powłoki poddano testom korozyjnym oraz charakteryzowano z zastosowaniem następujących metod: SEM, EDS. Wykonano też badania na profilometrze optycznym. Metoda micro-arc oxidation pozwala na uzyskanie warstwy o największej grubości oraz najlepszej odporności na korozję.
Źródło:
Metallurgy and Foundry Engineering; 2016, 42, 3; 187-193
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies