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Tytuł:
Analysis of the Forming Process of Energy-Absorbing Elements made from 7000 Series High-Strength Aluminum Alloy
Autorzy:
Jaśkiewicz, K.
Skwarski, M.
Polak, S.
Gronostajski, Z.
Krawczyk, J.
Kaczyński, P.
Chorzępa, W.
Powiązania:
https://bibliotekanauki.pl/articles/355556.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloys
hot forming
Opis:
The paper covers the research on the process of solutionizing of 7075 aluminum alloy in cold tools during the stamping of a high-strength structural element (B-pillar’s base). For technological reasons, in order to obtain high strength parameters of the 7075 alloy, it is necessary to carry out a solutionization process, which allows to obtain dispersion strengthening during ageing process. Properly performed heat treatment of the alloy increases the strength of the material to approx. 600 MPa. The combination of the process of solutionization with simultaneous shaping is aimed at improving and simplifying technological operations of aluminum alloy stamping, shortening the duration of the manufacturing process and reducing production costs. The manufactured lower part of the B-pillar will be used for the verification of the validity of the developed method. During the experiment, a series of stamping tests were carried out, in which the lubricants, pressure and position of the upper and lower blankholders were the variables. The obtained results allow to estimate the influence of the cooling conditions on the strength of the drawpieces obtained after the process of artificial ageing. In order to verify and analyse the results more quickly, a numerical simulation was carried out.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 697-705
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Primary Crystals of AlFeMnSi Intermetallics in the Cast AlSi Alloys
Autorzy:
Warmuzek, M.
Powiązania:
https://bibliotekanauki.pl/articles/355200.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloys
intermetallic
solidification
microstructure
Opis:
In this paper the results of the microscopic observations of the intermetallic AlFeMnSi phases crystals formed in the liquid hypo- and eutectic AlSi alloys containing transition metals 3.0 wt.% Fe and 0.1, 0.5 and 2.0 wt.% Mn were presented. The crystals morphology has been revealed on both polished and deep etched microsections. The different stages of the primary AlFeMnSi phases particles formation in the solidifying alloy and their final morphology were shown as influenced by cooling rate and alloy chemical composition.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1659-1664
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of CNC face milling process of Al-6061-T6 aluminum alloy
Autorzy:
Jarosz, K.
Löschner, P.
Niesłony, P.
Krolczyk, G.
Powiązania:
https://bibliotekanauki.pl/articles/99717.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
aluminum alloys
CNC
face milling
optimization
Opis:
In modern machining industry, the use of computer software is an integral element in the design of technological processes. This work aims to present possibilities for optimization of milling operations with the use of commercial software designed especially for that use. A face milling operation of an aluminium flange was chosen for this study. Several different optimization strategies were described and their results shown, analysed and discussed. The effect of variable radial depth of cut on cutting force values in milling processes was reflected upon. Additionally, further research involving comparison of experiment results with simulation was proposed. It was proven that correct optimization strategy can reduce machining time for the analysed face milling operation about 37% without exceeding imposed process parameter constraints.
Źródło:
Journal of Machine Engineering; 2017, 17, 1; 69-77
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties of 5083, 5059 and 7020 aluminium alloys and their joints welded by MIG
Autorzy:
Dudzik, K.
Powiązania:
https://bibliotekanauki.pl/articles/245438.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
welding MIG
aluminum alloys
mechanical properties
Opis:
The article presents the research results on the mechanical properties of aluminum alloy 7020 and its MIG welded joints. For comparison alloy 5083 - the most currently used in shipbuilding alloy was chosen as well as 5059 -the new high-strength alloy. Besides the native material alloys there were investigated their joints welded by MIG -the same method as alloy 7020. Welding parameters used for the connection of the sheets made of 7020, 5083 and 5059 alloys were presented. Metallographic analysis showed the correct construction of structural bonded joints. The arc welding method - MIG is the most common method of joining aluminum alloys used in shipbuilding. It replaces the TIG method of providing equally high quality of joints with a much higher performance. The research was carried out using a static tensile test in accordance with the requirements of the Polish Standard PN-EN 10002:2004. Flat samples cut perpendicular to the direction of rolling were used. The research was conducted at the temperature of + 20 centigrade. The 7020 alloy has higher strength properties then alloys: 5083 and 5059. The yield stress is higher by 14.8% compared to 5083 alloy, and by 11.7% compared to the alloy 5059. Plastic properties of an alloy 7020 are the lowest, but with reserves meet the requirements of classification societies. The joints welded by MIG of 7020 alloy have higher strength properties then joints of alloys: 5083 and 5059. Plastic properties of alloy 7020 compared to 5083 alloy are smaller and at the same level as the connector alloy 5059.
Źródło:
Journal of KONES; 2011, 18, 3; 73-77
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic properties of 7000 - series aluminum alloys at large strain rates
Autorzy:
Jurczak, W.
Kyzioł, L.
Powiązania:
https://bibliotekanauki.pl/articles/258981.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
High resistance aluminum alloys
dynamic characteristics
Opis:
This paper presents test results of mechanical properties of EN AW-AlZn5Mg1Zr and EN AWAlZn5Mg1,5CuZr aluminum alloys for various tensile strain rates. Static tests were conducted with the use of MTS 810.12 tension test machine, and dynamic tests - with RSO rotary impact test machine. The work was aimed at determination of effects of strain rate and notch geometry of specimens on their material mechanical properties and damage mechanisms.
Źródło:
Polish Maritime Research; 2012, 1; 38-43
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Ultrasonication Dispersion Technique on Sintering Properties of CNT Reinforced Al-Zn-Mg-Cu Powder
Autorzy:
Rudianto, H.
Edtmaier, C.
Dlouhy, I.
Soukal, F.
Powiązania:
https://bibliotekanauki.pl/articles/355745.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
powder metallurgy
nanocomposites
sintering
aluminum alloys
Opis:
CNT has been researched significantly due to its properties especially mechanical and conductivity properties. Due to strong affinity between particles, dispersion has been remained a problem for its applications. Ultrasonication technique was used to disperse CNT on aluminum powder. Ultrasonication has successfully dispersed CNT on aluminum powder in ethanol. Low energy ball milling for 1h under argon gas with 5:1 ball to powder ratio was used to optimize dispersion of CNT on aluminum. CNT concentration in this research is ranged from 0.1 up to 3wt%. Premix Al-5.5Zn-2.5Mg-0.5Cu powder was used as matrix for this research. Sintering at 580°C for 1h under argon gas was carried to produce high density materials. Pores are still remained on material and it is possibility that pores were caused by agglomeration of CNT. Dispersion high content of CNT is still remained obstacle on this research. Aluminum carbide, Al4C3 is recognized as a ‘bridge between aluminum and CNT for stress transfer was investigated in this research. Raman Spectroscopy, XRD and SEM-EDS were carried out to characterize materials.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1131-1135
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of welding method on microstructure and mechanical properties of aluminum alloys joints
Wpływ metody spawania na mikrostrukturę i właściwości mechaniczne złączy ze stopów aluminium
Autorzy:
Noga, Piotr
Richert, Maria
Węglowski, Marek Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/264317.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
aluminum alloys welding
aluminum alloys
welding
TIG
MIG
EBW
FSW
spawanie stopów aluminium
stopy aluminium
spawanie
Opis:
Rapid technological progress in recent years has led to an intensified interest in alternative methods of joining metals. Today’s industry is constantly demanding new joining processes, which enable high-quality welded joints in a wide range of thicknesses of combined materials at low production cost. There are at least several dozen welding methods currently available. The selection of the process depends on the type of welded materials, acceptable heat input, as well as future working conditions. The paper presents the results of the microstructural examination and mechanical properties of joints of the aluminum alloy for plastic working such as EN AW-6082. The paper presents the results of microstructural observations and mechanical properties of EN AW-6082 aluminum alloy. Methods used for joining were successively TIG (welding with a non-consumable electrode in a shield of inert gases), MIG (welding with a consumable electrode in a shield of inert gases), EBW (electron beam welding) along with FSW (friction stir welding method). TIG (welding with a non-consumable electrode in a shield of inert gases), MIG (welding with a consumable electrode in a shield of inert gases), EBW (electron beam welding) along with FSW (friction stir welding method) were used as joining techniques.
Współczesny przemysł wymaga opracowania i udoskonalania metod, które umożliwiają uzyskanie wysokiej jakości połączeń w szerokim zakresie grubości łączonych materiałów oraz obniżenie kosztu produkcji. Istnieje kilkadziesiąt metod spawania. Proces ten trzeba dostosować do rodzaju spajanych materiałów, dostępnych źródeł energii, a także do przyszłych warunków pracy urządzeń. W pracy przedstawiono wyniki badań łączenia najpopularniejszego stopu do przeróbki plastycznej, jakim jest stop EN AW-6082. Metodami wykorzystanymi do łączenia były zarówno najbardziej popularne techniki spawania: TIG (spawanie elektrodą nietopliwą w osłonie gazów obojętnych), MIG (spawanie elektrodą topliwą w osłonie gazów obojętnych), metoda wysokoenergetyczna EBW (spawanie wiązką elektronową), jak również metoda zgrzewania tarciowego z mieszaniem materiały zgrzeiny – FSW.
Źródło:
Metallurgy and Foundry Engineering; 2019, 45, 2; 43-50
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure of Friction Stir Welded Dissimilar Wrought 2017A and Cast AlSi9Mg Aluminum Alloys
Autorzy:
Kopyściański, M.
Dymek, S.
Hamilton, C.
Węglowska, A.
Pietras, A.
Szczepanek, M.
Wojnarowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1032926.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
friction stir welding
aluminum alloys
microstructure
Opis:
Friction stir welding was applied to join dissimilar aluminum alloys: wrought 2017A and cast AlSi9Mg. The produced weldment was free from cracks and any discontinuities. The weld microstructure was composed of alternating bands of the welded alloys; however, the alloy that was placed on the advancing side (AlSi9Mg) dominated the weld center. The grain size within the particular bands was similar in both alloys. The hardness profile reflected the microstructure formed during welding. The weld microstructure as well as the shape of hardness profile across the weld were justified by numerical simulation of material flow during welding.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1390-1393
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser percussive strengthening of the aluminum alloys
Autorzy:
Napadłek, W.
Powiązania:
https://bibliotekanauki.pl/articles/244534.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
laser radiation
aluminum alloys
laser percussive strengthening
Opis:
The matter of laser percussive strengthening by shock wave generated from laser pulse (LSP - Laser Shock Peening or LPS - Laser Percussive Strengthening) is presented. The building of the investigative position to making the quick photo of the laser influence with the subject was described. The idea of the registration of fast changing physical processes kinetics setting near the influence of short laser impulses with the aluminum alloys (ENAW-2017A and ENAW-2618A) was introduced. Variants were applied for enlargement of the process efficiency of laser strengthening in laboratory experiments from thin absorbing coat and inert layer (water). The tests results of the surface layer strengthening of ENAW-2017A and ENAW-2618A aluminum alloys are described. Those investigations enclose selection of strengthening parameters above named materials, measurement of: the surface topography, microstructure, micro-hardness and also fatigue investigations in restricted range for sigma =180 i 350 MPa. It was confirmed essential influence of surface topography as well as created subsoil microstructure on the fatigue life of strengthening samples. Obtained research results were confirmed very beneficial influence of used surface strengthening processing on the fatigue life.
Źródło:
Journal of KONES; 2011, 18, 1; 373-383
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Residual stresses measurements with X-ray diffractometry on aluminum specimens - determination of the most suitable parameters of measurement
Autorzy:
Gadalińska, E.
Kaniowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/245743.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
X-ray diffractometry
residual stresses
fatigue
aluminum alloys
Opis:
The work was done as apart of the IMPERJA Eureka Project. The goal of the IMPERJA project is to increase the fatigue life of riveted joints, which will lead to an increase of the aircraft service life, a smaller number of inspections and lower operation costs of an aircraft. The consortium intends to meet this goal by investigating and improving the riveting process as well as improving the prediction methods for fatigue life. Riveting is the most commonly used method of joining sheet metal components of the aircraft structure. Typically, the number of rivets ranges from several thousands to some millions in a single aircraft depending on the specific aircraft type and size. The riveted joints are critical areas of the aircraft structure due to severe stress concentrations and effects such as fretting and secondary bending. Therefore the fatigue crack initiation will start at the rivets holes. Fatigue crack initiation usually occurs at a number of rivet holes (multiple site damage), which may lead to widespread fatigue damage and reduced residual strength. Although the literature on the fatigue behaviour of riveted joints is quite abundant, many aspects are still not sufficiently understood and investigated and, therefore, they require a further study. The work contains the results of stress measurements obtained with X-ray diffractometer. The aim of the work was to determine the stress values after different kinds of treatment, to check what are the limits of the x-ray measurement for aluminum alloys and to obtain the most suitable measurement parameters for this kind of alloy. There were 5 kinds of specimens: -specimen no. l - technically pure aluminum, specimen annealed in temperature 300° C for l hour, -specimen no. 2 - technically pure aluminum, raw state without any additional treatment, -    -specimen no. 3 - technically pure aluminum, squeezed perpendicularly to the axis direction, force: l00 kN, longitudinal intersection, specimen no. 4 - technically pure aluminum, squeezed perpendicularly to the axis direction, force: 100 kN, transverse intersection, specimen no. 5 - PA24 alloy, 05 bar, squeezed along the axis of the rod, force: l3,9 kN, longitudinal intersection. The second part of the work contains the measurements of the stress distribution around the rivets. The specimen prepared to realize this kind of measurements had four areas. The rivets on every area were riveted with the different riveting force: 1.2 kN; 1.4 kN; 1.5 kN and 1.55 kN.
Źródło:
Journal of KONES; 2009, 16, 4; 123-134
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the Production Process of High-Strength Products from Aluminum-Magnesium Alloys for their Direct Processing into Sheets Via Cold Rolling
Autorzy:
Ściężor, W.
Mamala, A.
Kowal, R.
Kwaśniewski, P.
Franczak, K.
Strzępek, P.
Powiązania:
https://bibliotekanauki.pl/articles/353274.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloys
twin roll casting
cold rolling
hardness
Opis:
Modern metal forming processes of non-ferrous metals, particularly aluminum and its alloys, are increasingly based on integrated technologies combining numerous operations in one process line. The subject of this paper focuses on the possibility of using materials after mould casting (simulating a continuous casting process between cylindrical crystallizers - Twin Roll Casting method) for the direct cold rolling process. As a part of this research a pilotage study on metallurgical synthesis and mould casting process of Al-Mg alloys with the magnesium contents of 5%-10%, testing their mechanical, electrical and structural properties as well as susceptibility to cold plastic deformation. This process was carried out with the measurement of strength parameters and confirmed the possibility of cold rolling alloys with a casting structure without prior hot deformation.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1487-1493
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Possibility of Obtaining Aviation Profiles from 7039 Aluminum Alloy in the Extrusion Process
Autorzy:
Pawłowska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/175941.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
backward extrusion
aluminum alloys
extrusion profiles
7039 alloy
Opis:
This article presents the process of extrusion shape of complex geometry cross-sectional 7039 aluminum alloy for use in aerospace industry. This study aims to characterize the properties of aluminum alloy as structural material and to determine the technological parameters of the indirect extrusion press and their influence on mechanical properties and the microstructure of the final product. It has been proved that the proper choice of parameters in the case of a specific profile extruded from 7039 aluminum alloy allows the manufacturing of products of complex cross-sections and the quality required in aerospace industry.
Źródło:
Advances in Manufacturing Science and Technology; 2020, 44, 2; 46-50
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Iron impact on the quality of sand casting made from secondary AlSi7Mg0.6 alloy used in the automotive and aerospace industry
Autorzy:
Pastierovičová, Lucia
Kuchariková, Lenka
Tillová, Eva
Chalupová, Mária
Powiązania:
https://bibliotekanauki.pl/articles/24202595.pdf
Data publikacji:
2022
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
casting quality
secondary aluminum
aluminum alloys
Fe content
porosity
automotive
Opis:
Due to the high demand for secondary alloys in the automotive and aerospace industry, this work investigates the effect of higher iron content on the quality of AlSi7Mg0.6 sand castings. Secondary-recycled Al-Si alloys contain an increased amount of impurities due to their remelting of scrap metal. One of the most unwanted impurities found in these alloys is iron. Iron leads to the formation of various Fe-rich intermetallic phases, whose morphology influences the mechanical properties even at low Fe content. It also promotes the formation of casting defects, such as porosity and shrinkage. The formation of porosity in secondary Al-alloys is another major aspect that can affect the final properties of castings. Since these materials are mainly used to produce castings for the automotive industry, such as engine blocks, cylinder heads, and so on, it is necessary to produce castings without any defects. Therefore, the quality of AlSi7Mg0.6 sand casting is investigated at lower iron content (0.128% wt. Fe) and compared to the higher iron content (0.429% wt. Fe), whereby a correlation between iron content and porosity is monitored.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 72 (144); 86--91
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrasonic-vibration assisted arc-welding of aluminum alloys
Autorzy:
Krajewski, A.
Włosiński, W.
Chmielewski, T.
Kołodziejczak, P.
Powiązania:
https://bibliotekanauki.pl/articles/201701.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ultrasonic vibrations
MIG/TIG welding
aluminum alloys
structure
microhardness
Opis:
The structure and hardness of the surface-welds and fusion-welds made on a 2017A aluminum alloy waveguide using the MIG and TIG methods with and without the participation of ultrasonic vibrations were examined. Cross-sections of the fusions and surface-welds thus obtained were observed in a microscope and the hardness distributions were determined. The aim of the study was to analyze the effects of the ultrasonic vibrations applied to the melted metal pool by a vibrating substrate which in our experiments was a waveguide. The interactions of the ultrasonic vibrations with the molten metal during its solidification and also with the heat-affected zone were examined at various phases of the vibration wave. The ultrasonic vibrations affected the structure of a weld. These changes are strongly depended on the wave phase.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 841-852
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion Protection of Selected Aluminum Wrought Alloys applied in the Automotive Industry
Autorzy:
Jakóbczak, Karol
Kowalik, Remigiusz
Powiązania:
https://bibliotekanauki.pl/articles/2203748.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
corrosion
car wires
corrosion inhibitors
heat exchangers
aluminum alloys
Opis:
The paper aims to review the corrosion properties of selected aluminum alloys applied in the automotive industry which are used in heat exchangers, bodyworks and car wires. Particular attention was focused on application of selected chemical compounds which added to corrosive environment in certain amounts lead to decrease of corrosion rate of protected aluminium alloy. Considered different environmental conditions which are simulating real vehicle exploitation. At review analyzed ability to application mentioned compounds on automotive parts, because there is needed fill of following requirements: environmentally friendly, relatively inexpensive and characterized by long-term performance under certain conditions. Main conclusion of review is that there are needed extension of research regarding to application of inhibitive compounds especially on the surface of cars wires.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 287--293
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 93

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