Informacja

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

Wyszukujesz frazę "composite alloy" wg kryterium: Wszystkie pola


Tytuł:
Composite alloy for IC engine pistons
Autorzy:
Jankowska-Sieminska, B.
Jankowski, A.
Sławinski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/246922.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
engine pistons
composite alloys
thermal analysis
Opis:
Aluminum is the most popular matrix for the metal matrix composites The Al alloys are attractive due to their low density, their capability to be strengthened by precipitation, their good corrosion resistance, high thermal and electrical conductivity, and their high damping capacity. The characteristics of metal matrix composite materials are determined by their microstructure and internal interfaces, which are affected by their production and thermal mechanical treatment. Investigations to improve the combustion piston engines arę leading to improve the working process performance by increase ofits parameters, especially the average temperature of the thermodynamic cycle. New piston consists of two parts manufactured of standard and composite materials are presented in the paper. Composite alloy has chemical composition of short fibre with Al2 O3 was following, in the mass percentage: 96% Al2 03, 4%, SiO2. As the binder the colloidal silica was used in quantity 5%. The volume of fibres in the insert was 22 plus or minus 2% by volume. Bending strength of the insert was 0.5 MPa. Temperature and stresses distribution in standard piston and different versions of composite pistons are introduced in the paper. The paper presents the resistance of investigated materials on thermal shocks. Experimental veriflcation of manufactured composite pistons in the engine proved the larger exhaust temperaturę for about 20-70°C, in comparison with the engine with standard pistons (that gives the greater effectiveness of turbo charging application), proved the lowering of a individual volume of gases blow-bys to the crankcase, the lowering of noise level, larger resistance on thermal loads.
Źródło:
Journal of KONES; 2010, 17, 2; 159-166
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Researches novel materials on the pistons with low hysteresis to combustion engines
Autorzy:
Sieminska, B.
Slawinski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/243012.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
engine pistons
composite alloy
thermal expansion
hysteresis
Opis:
The researches were carried out at the use of the precise dilatometer of the firm BAHR 802/801. The device makes possible the registration of changes of measurements of the sample in the function of the temperature. Measurements in the simpler and differential are possible. Heating and cooling is performed in the special device, which realizes the programme temperature, controlled computer. Changes of dimensions are measured with an inductive sensor. Samples were placed in the quartz-pipe and changes of their length were transferred by quartz-rods. The temperature of tested material was measured by means of the Pt-PtRh thermocouple. Material on the pistons has a fundamental meaning for the value of the clearances between the cylinder and the piston. Too small clearness between the piston and cylinder on the cold engine cannot be applying, because during the work of an engine it would be able to occur seizing of an engine. From here, also the large resistance on seizing of material of the piston is essential. Investigated composite materials performed based on piston-silumins AK12 and AK18 in which a composite addition was silicon carbide (SiC) and ferric sulphide (FeS).
Źródło:
Journal of KONES; 2012, 19, 4; 549-554
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dilatometric researches of novel alloy for combustion engine pistons
Autorzy:
Żurek, J.
Slawinski, Z.
Jankowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/243032.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine piston
composite alloy
piston sample elongation
hysteresis
piston clearance
Opis:
The article presents dilatometric research results of composite alloy (in-situ) for combustion engines piston. Researches were performed with a precise dilatometer. Alloy's research test stand and test results including relative elongation, course of derivative of dimension increasing versus time with phase transition and course of coefficient of linear thermal expansion α for composite alloy versus temperature are presented in the article. Novel composite alloy allows getting a minimum difference of the coefficient of linear thermal expansion α during heating and cooling. In particular, the chemical composition of the novel composite silumin alloys; ATD of standard alloy – silumin Ak12 and novel composite alloy; schema of research stand and view of the measuring-head of the extension; course of the coefficient of linear thermal expansion α versus temperature during heating and cooling for the standard alloy and novel composite alloy; course of the relative piston elongation ΔL/Lo versus temperature during heating and cooling for the standard alloy and novel composite alloy; course of the derived function of the extension in relation to time dL/dt versus temperature for the standard alloy on pistons and novel composite alloy; course of the relative elongation in function of time during ageing of composite alloy at the temperature of 200°C with two-stage ageing process; course of the relative elongation in function of time during ageing of composite alloy at the temperature of 200°C for the first stage and second stage are presented in the article.
Źródło:
Journal of KONES; 2016, 23, 3; 585-596
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Researches of novel composite pistons for combustion engines
Autorzy:
Jankowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/247291.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
engine pistons
composite alloy
thermal expansion
hysteresis
engine test
Opis:
Novel composite material was worked out based on experiences and researches realized in the Institute of Aviation, the Lodz Technical University and PZL WOLA Company. Actually applied silumins on the pistons secure them high-quality for durability, low Rm and HB values at increased temperature, high hysteresis of the coefficient a during heating and cooling, high clearance between the piston and the cylinder, increased oil consumption, blowthrough and obtainment relatively low-power engine. Thereby works concerning elaborations of novel composite material based on the standard silumin with better from at present applied on the piston properties are presented. Novel composite material on the pistons has mechanical properties in the ambient temperature: Rm ≥ 400 MPa; Rp0.2 ≥ 330 MPa; A5 ≥ 3.5%; HB ≥ 130 and in the temperature 250°C: Rm ≥ 320 MPa; Rp0.2 ≥ 240 MPa; A5 ≥ 5%; HB ≥ 90. Metallographic and ATD researches, the researches of the hardness, the researches of Rm, Rp0.2 and A5, the researches of the coefficient of thermal expansion "α", engine researches were performed. Curves ATD and the microstructure the alloy are presented. Test results of the S12-U diesel engine engine are introduced too.
Źródło:
Journal of KONES; 2013, 20, 4; 141-146
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research performance of novel design of diesel engine
Autorzy:
Kowalski, M.
Jankowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/949487.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
internal combustion engine
Diesel engine
engine piston
composite alloy
thermal stability
Opis:
Certain results of the comparative studies of the high-speed Diesel engine V-12 of the “W” series were presented in the article. The engine was modernised in regard of possibilities to achieve better performances at specific fuel consumption, smaller exhaust emission, smaller scavenge, lower noise and better thermal stability. The subject of this work is the piston cast of novel composite silumin. The development of novel composite silumin (aluminium-silicon alloy), which contains a little more Copper and Nickel, and the introduction of novel alloyed elements, such as Chromium, Molybdenum, Tungsten, increases the strength of the alloy and its thermal stability during successive heating and cooling. The pistons made of this alloy may have a little bigger outside diameter than the pistons made of PA-12 standard alloy, and a smaller clearance between the piston and cylinder liner. The pistons made of standard and novel alloy were mounted successively in the "W" engine. The full load and part load curves were determined. The lubrication oil consumption, fuel consumption, exhaust emission, blow-by and noise were determined too. The article presents the results of the above-mentioned research. The novel composite alloy enables further engine modernization because the engine should operate at higher pressure and temperature in the combustion chamber.
Źródło:
Journal of KONES; 2017, 24, 4; 99-108
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of the precise position of the aircraft in air navigation based on the solution of the RTK-OTF technique
Autorzy:
Kowalski, M.
Jankowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/242780.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
internal combustion engine
Diesel engine
engine piston
composite alloy
thermal stability
Opis:
Certain results of the comparative studies of the high-speed Diesel engine V-12 of the “W” series were presented in the article. The engine was modernised in regard of possibilities to achieve better performances at specific fuel consumption, smaller exhaust emission, smaller scavenge, lower noise and better thermal stability. The subject of this work is the piston cast of novel composite silumin. The development of novel composite silumin (aluminium-silicon alloy), which contains a little more Copper and Nickel, and the introduction of novel alloyed elements, such as Chromium, Molybdenum, Tungsten, increases the strength of the alloy and its thermal stability during successive heating and cooling. The pistons made of this alloy may have a little bigger outside diameter than the pistons made of PA-12 standard alloy, and a smaller clearance between the piston and cylinder liner. The pistons made of standard and novel alloy were mounted successively in the "W" engine. The full load and part load curves were determined. The lubrication oil consumption, fuel consumption, exhaust emission, blow-by and noise were determined too. The article presents the results of the above-mentioned research. The novel composite alloy enables further engine modernization because the engine should operate at higher pressure and temperature in the combustion chamber.
Źródło:
Journal of KONES; 2017, 24, 4; 99-108
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of novel composite pistons for diesel engine
Autorzy:
Jankowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/247362.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
internal combustion engine
diesel engine
piston engine
composite alloy
combustion engine performance
Opis:
The paper presents the requirements to be met by diesel engines and their components, in particular pistons for engines of military vehicles. These requirements are related to the mass of modern military vehicles, which has greatly increased. Materials for the piston should have a good strength properties and low hysteresis of thermal expansion coefficient α across the range of operating temperatures, good resistance to galling, low abrasion, low coefficient of friction and good functional properties. On the clearance of the piston in the cylinder, the coefficient of thermal expansion α and its hysteresis has a decisive influence. The paper includes information on the piston working clearances, the requirements for pistons materials, their chemical composition, standard materials for the forged pistons, for the cast pistons (silumin alloys) and for the composite pistons. The paper presents the changes in coefficient of thermal expansion for the alloy in the raw state and after heat treatment and pistons made of new composite material prior to motor testing and after these tests. The completed new pistons have a lower coefficient of thermal expansion and lower hysteresis α, which allows reducing the running piston and cylinder clearances with the resulting effects.
Źródło:
Journal of KONES; 2014, 21, 4; 211-216
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary Tests of Cellular SiC/Iron Alloy Composite Produced by a Pressureless Infiltration Technique
Autorzy:
Lipowska, B.
Psiuk, B.
Cholewa, M.
Kozakiewicz, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/380467.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kompozyty ceramiczno-metalowe
ceramika porowata
żeliwo
węglik krzemu
ceramic-metal composites
porous ceramics
cast iron
silicon carbide
Opis:
Preliminary tests aimed at obtaining a cellular SiC/iron alloy composite with a spatial structure of mutually intersecting skeletons, using a porous ceramic preform have been conducted. The possibility of obtaining such a composite joint using a SiC material with an oxynitride bonding and grey cast iron with flake graphite has been confirmed. Porous ceramic preforms were made by pouring the gelling ceramic suspension over a foamed polymer base which was next fired. The obtained samples of materials were subjected to macroscopic and microscopic observations as well as investigations into the chemical composition in microareas. It was found that the minimum width of a channel in the preform, which in the case of pressureless infiltration enables molten cast iron penetration, ranges from 0.10 to 0.17 mm. It was also found that the ceramic material applied was characterized by good metal wettability. The ceramics/metal contact area always has a transition zone (when the channel width is big enough), where mixing of the components of both composite elements takes place.
Źródło:
Archives of Foundry Engineering; 2017, 17, 1; 115-120
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Lifetime Measurements of Subsurface Region in Aluminium Alloy and Aluminium Alloy Composite after Dry Sliding
Autorzy:
Dryzek, E.
Powiązania:
https://bibliotekanauki.pl/articles/2043305.pdf
Data publikacji:
2005-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
Opis:
This paper presents positron lifetime studies of the subsurface region of AK12 aluminium alloy and Al$\text{}_{2}$O$\text{}_{3}$-particle-reinforced AK12 aluminium alloy composite after sliding against steel in the pin-on-disc machine. The defect depth profile detected in the AK12 alloy extended up to 300μm but for the composite AK12 the range of this profile was significantly shortened to less than 90μm. The positron lifetime dependence on depth evidences a steep gradient of defect concentration near the surface. The subsurface zones have been also examined using scanning electron microscopy.
Źródło:
Acta Physica Polonica A; 2005, 107, 5; 753-760
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Manufacturing of Al Alloy Matrix Composite Materials Reinforced with MAX Phases
Autorzy:
Dmitruk, A.
Naplocha, K.
Powiązania:
https://bibliotekanauki.pl/articles/382950.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
MAX phase
SHS synthesis
microwave
porous structure
squeeze casting
faza MAX
synteza SHS
mikrofala
struktura porowata
Opis:
A method for manufacturing of Al-Si alloy (EN AC-44200) matrix composite materials reinforced with MAX type phases in Ti-Al-C systems was developed. The MAX phases were synthesized using the Self-propagating High-Temperature Synthesis (SHS) method in its microwave assisted mode to allow Ti2AlC and Ti3AlC2 to be created in the form of spatial structures with open porosity. Obtained structures were subjected to the squeeze casting infiltration in order to create a composite material. Microstructures of the produced materials were observed by the means of optical and SEM microscopies. The applied infiltration process allows forming of homogeneous materials with a negligible residual porosity. The obtained composite materials possess no visible defects or discontinuities in the structure, which could fundamentally deteriorate their performance and mechanical properties. The produced composites, together with the reference sample of a sole matrix material, were subjected to mechanical properties tests: nanohardness or hardness (HV) and instrumental modulus of longitudinal elasticity (EIT).
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 198-202
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neutron Diffraction Study and Deformation Behavior of a Composite Based Mg Alloy Reinforced by Short Saffil Fibers
Autorzy:
Farkas, G.
Máthis, K.
Pilch, J.
Powiązania:
https://bibliotekanauki.pl/articles/1402148.pdf
Data publikacji:
2015-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.64.Bx
88.30.mj
61.72.Hh
Opis:
In the present work neutron diffraction has been applied for ex situ investigation of residual stresses in Mg-4%Al-1%Ca (AX41) magnesium alloy reinforced with short Saffil fibers. Samples were deformed in compression at room temperature. Two types of fiber arrangement were investigated. In both samples the fibers were homogeneously distributed and arranged in parallel planes with a random fiber orientation. In the first sample these planes were parallel with the loading axis and in the second one they were perpendicular to the loading direction. Significant dependence of both the mechanical properties and residual strains on the fibers orientation was observed. Sample with parallel fiber arrangement showed higher hardness and lower ductility. Further the increment of residual tensile lattice strain in the matrix with a macroscopic deformation is much higher than in the other case. It was found that the residual strain evolution strongly depends on the orientation of grains in the matrix.
Źródło:
Acta Physica Polonica A; 2015, 128, 4; 758-761
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of AlSi9Mg Alloy Matrix Composite Reinforced with Short Carbon Fibre after Remelting
Autorzy:
Łągiewka, M.
Konopka, Z.
Powiązania:
https://bibliotekanauki.pl/articles/380166.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metal matrix composite
short carbon fibre
silumin
mechanical properties
recycling of composite
kompozyt metalowy
włókno węglowe
właściwości mechaniczne
recykling kompozytu
Opis:
The presented work describes the results of examination of the mechanical properties of castings made either of AlSi9Mg alloy matrix composite reinforced with short carbon fibre or of the pure AlSi9Mg alloy. The tensile strength, the yield strength, Young’s modulus, and the unit elongation were examined both for initial castings and for castings made of the remelted composite or AlSi9Mg alloy. After preparing metallographic specimens, the structure of the remelted materials was assessed. A few non-metallic inclusions were observed in the structure of the remelted composite, not occurring in the initial castings. Mechanical testing revealed that all the examined properties of the initial composite material exceed those of the non-reinforced matrix. A decrease in mechanical properties was stated both for the metal matrix and for the composite after the remelting process, but this decrease was so slight that it either does not preclude them from further use or does not restrict the range of their application.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3; 39-42
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Brazing a graphite composite to molybdenum alloy TZM using active copper-based filler metals with chromium additive
Lutowanie twarde kompozytu grafitowego ze stopem molibdenowym TZM aktywnymi spoiwami miedzianymi z dodatkiem chromu
Autorzy:
Mirski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/351567.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
grafit kompozytu CFC 222
stop molibdenu TZM
lutowanie
spoiwa miedziane z dodatkiem chromu
zwilżanie
próba klinowa
szczelina lutownicza
badania metalograficzne
EDX
XRD
graphite composite CFC 222
molybdenum alloy TZM
vacuum brazing
copper-based brazing filler metal Cu-Cr
wettability
wedge test
brazing gap
metallographic examinations
EDX and XRD analyses
Opis:
The paper presents issues of brazing the graphite composite CFC 222 with the molybdenum alloy TZM. Both materials demonstrate significant differences in physicochemical and mechanical properties that significantly affect brazing conditions and properties of the brazed joints. The performed brazing operation was preceded by a wettability test that decided selection of the filler metal. From among various copper-based filler metals, the best appeared a copper brazing filler metal with some addition of active chromium. Presented is a model of the wedge test, helpful at optimising the brazing process of two materials with different properties. Width of the brazing gap was selected on the ground of metallurgical examinations after the wedge test and transferred to the joint with a parallel gap. Applied were various forms of copper-based filler metals in that chromium was present as an alloying component, a component of the brazing paste, powder between copper covers and as a galvanic coating of a pure-copper strip. Evaluation of brazed joints of the composite CFC 222 with the TZM alloy is presented on the grounds of metallographic examinations by means of light microscopy and microhardness measurements, electron microscopy, EDX analysis of elements and XRD analysis of phase composition of the reactive zone.
W pracy przedstawiono problematykę lutowania twardego kompozytu grafitowego CFC 222 ze stopem molibdenowym TZM. Obydwa materiały wykazują znaczne różnice we właściwościach fizykochemicznych i mechanicznych, które mają istotny wpływ na warunki lutowania i właściwości uzyskanych połączeń lutowanych. Wykonanie połączeń poprzedziła próba zwilżalności, która zdecydowała o wyborze lutu. Spośród różnych lutów na osnowie miedzi najlepszy okazał się lut miedziany z dodatkiem aktywnego chromu. Przedstawiono model próby klinowej, pomocny w optymalizacji procesu lutowania obydwu materiałów zróżnicowanych właściwościach. Na podstawie próby klinowej, w wyniku badań metalograficznych, dobrano szerokość szczeliny lutowniczej i przeniesiono ją na złącze ze szczeliną równoległą. Stosowano różne postacie lutów miedzianych, w których chrom występował jako składnik stopowy, składnik pasty lutowniczej, proszek między okładkami miedzianymi i jako pokrycie galwaniczne taśmy z czystej miedzi. Ocenę połączeń lutowanych kompozytu CFC 222 ze stopem molibdenowym TZM przedstawiono na podstawie badań metalograficznych za pomocą mikroskopii świetlnej i pomiarów mikrotwardości, mikroskopii elektronowej, analizy pierwiastków metodą EDX oraz analizy składu fazowego strefy reakcyjnej metodą dyfrakcji rentgenowskiej XRD.
Źródło:
Archives of Metallurgy and Materials; 2011, 56, 3; 829-837
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tribological properties of composite coatings on aluminium alloy parts for transport means
Tribologiczne właściwości powłok kompozytowych na wykonanych ze stopów aluminium częściach środków transportu
Autorzy:
Posmyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/191141.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sliding coatings
anodic hard coating
magnetron sputtering
diamond-like carbon coating
composite materials
powłoki ślizgowe
anodowa powłoka twarda
rozpylanie katodowe
powłoki diamentopodobne
materiały kompozytowe
Opis:
The present paper describes the structure, surface topography, and tribological properties of a DLC composite coating produced by magnetron sputtering on an engine cylinder liner AC-AlSi12NiCuMg (AC-47000) cast alloy as well as on AW-A6061 aluminium alloy matrix W6.A15A composite (AW-6061+10Al2O3P) used for the production of oil-less air compressor cylinders and car roof sliders. The DLC coating slid against a TG15 sliding composite under dry friction, which is an equivalent to the friction system for oil-less air compressors and against cast iron under limited lubrication conditions (boundary lubrication). The limited lubrication conditions are dominant during the starting of a cold combustion engine, when the viscosity of oil is too high and the splash lubrication is not sufficient. The DLC coatings’ properties are compared with the anodic hard coatings (AHC) and composite coating with an AHC matrix applied in sliding contacts presently used. The wear of composite TG15 during sliding against DLC was higher than during sliding against AHC. The DLC coating can replace the anodic hard coating and composite coatings on its matrix presently used in sliding contacts.
W pracy przedstawiono strukturę, topografię powierzchni i właściwości tribologiczne kompozytowych powłok DLC wytworzonych metodą rozpylania magnetronowego na stosowanym do wytwarzania tulei cylindrowych silników spalinowych stopie odlewniczym AC-AlSi12NiCuMg (AC-47000) oraz na kompozycie W6.A15A z osnową ze stopu aluminium AW-606+10Al2O3P używanym do wytwarzania bezolejowych sprężarek powietrza i na prowadnice rozsuwanych dachów samochodowych. Powłoka DLC współpracowała z tworzywem TG15 w warunkach tarcia technicznie suchego, co odpowiada warunkom pracy sprężarek bezolejowych oraz z żeliwem w warunkach ograniczonego smarowania (tarcie graniczne). Warunki ograniczonego smarowania występują podczas rozruchu zimnego silnika, gdy lepkość oleju jest za wysoka a smarowanie rozbryzgowe niewystarczające. Właściwości powłoki DLC zostały porównane z właściwościami stosowanych dotychczas anodowej powłoki tlenkowej (AHC) i powłoki kompozytowej na jej osnowie. Zużycie tworzywa TG15 we współpracy z DLC było większe niż we współpracy z AHC. Powłoka DLC może zastąpić stosowaną dotychczas powłokę tlenkową i powłoki kompozytowe na jej osnowie.
Źródło:
Tribologia; 2017, 272, 2; 149-156
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Experimental Study Of Aluminum Alloy Matrix Composite Reinforced SiC Made By Hot Pressing Method
Badania kompozytu na osnowie stopu aluminium wzmacnianego SiC otrzymanego metodą prasowania na gorąco
Autorzy:
Suśniak, M.
Karwan-Baczewska, J.
Dutkiewicz, J.
Actis Grande, M.
Rosso, M.
Powiązania:
https://bibliotekanauki.pl/articles/355120.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al/SiC composites
powder metallurgy
mechanical alloying
hot pressing
kompozyt Al/SiC
metalurgia proszków
stopowanie mechaniczne
prasowanie na gorąco
Opis:
The present work investigates the possibility of using powder metallurgy processing for producing a metal matrix composite. Materials were prepared from AlSi5Cu2 chips with reinforcement of 10, 15, 20 wt. % silicon carbide. Aluminum alloy chips were milled with SiC powder in a high-energy ball mill by 40 hours. Mechanical alloying process lead to obtain an uniform distribution of hard SiC particles in the metallic matrix and refine the grain size. The consolidation of composite powders was performed by vacuum hot pressing at 450°C, under pressure of 600 MPa by 10 min. The results shows that the addition of SiC particles has a substantial influence on the microstructure and mechanical properties of composite powder as well as consolidated material. Hot pressing is an effective consolidation method which leads to obtain dense AlSi5Cu2/SiC composite with homogeneous structure and advanced mechanical properties.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2B; 1523-1527
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-velocity impact characteristics of composite plates with shape memory alloy wires
Niskoprędkościowe charakterystyki uderzeniowe płyt kompozytowych zawierających włókna ze stopów z pamięcią kształtu
Autorzy:
Rim, M.-S.
Kim, E.-H.
Lee, I.
Choi, I.-H.
Ahn, S.-M.
Koo, K.-N.
Bae, J.-S.
Roh, J.-H.
Powiązania:
https://bibliotekanauki.pl/articles/279293.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
shape memory alloy
SMAHC
composite
low-velocity impact
impact resistance
Opis:
To investigate impact characteristics of shape memory alloy hybrid com- posites (SMAHC), several experiments were performed. Tensile tests of shape memory alloy (SMA) wires were carried out to investigate thermomechanical properties, and low-velocity impact tests of SMAHC plates and conventional composite plates without SMAs at the critical energy level. low-velocity impact tests of several types of composite plates, including composite plates with embedded SMAs/Fe/Al wires and conventional composite plates, were also done. Results of these experiments show that embedding SMAs in a composite plate can improve the impact resistance. Lastly, low-velocity impact tests of SMAHC plates with SMA wires embedded at different positions through the thickness were performed in an effort to improve the impact resistance. Embedding SMA wires at a lower position in the composite plates was the most effective for improving the impact resistance.
Do analizy charakterystyk uderzeniowych hybrydowych kompozytów SMAHC zwierających włókna SMA ze stopów wykazujących efekt pamięci kształtu przeprowadzono szereg badań eksperymentalnych. Przeprowadzono próby na rozciąganie włókien SMA w celu zbadania ich właściwości termomechanicznych oraz niskoprędkościowe testy uderzeniowe płyt SMAHC oraz konwencjonalnych płyt laminowanych przy energii krytycznej. Wykonano także testy dla płyt kompozytowych zawierających włókna SMA/Fe/Al. Rezultaty doświadczeń pokazały, że wbudowanie w strukturę laminatu włókien SMA może zwiększyć odporność kompozytu na obciążenie uderzeniowe. Opisano również badania eksperymentalne płyt SMAHC z włóknami SMA wbudowanymi na różnej głębokości. Wykazano, że najlepsze parametry posiadają kompozyty z włóknami umieszczonymi możliwie daleko od uderzanej powierzchni.
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 3; 841-857
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmodyfikowany kompozyt poliestrowo-szklany jako przekładka balistyczna dla stopu AlZn5Mg2CrZr
Modified polyester-glass composite as ballistic interlayer for alloy AlZn5Mg2CrZr
Autorzy:
Jurczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/223252.pdf
Data publikacji:
2007
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Opis:
W niniejszym artykule przedstawiono wyniki badań odporności balistycznej trójwarstwowych próbek o średnicy 50 mm przestrzeliwanych pociskiem kalibru 7,62 mm. Warstwy zewnętrzne, o grubości 6mm każda, wykonane były ze stopu AlZn5Mg2CrZr, natomiast wymienną warstwę środkową wykonano z kompozytu poliestrowo-szklanego przed i po jego modyfikacji, co polegało na dodaniu 20% recyklatu. Przekładka balistyczna wykonana ze zmodyfikowanego kompozytu poliestrowo-szklanego nie polepsza odporności balistycznej badanego stopu AlZn5Mg2CrZr w porównaniu do przekładki z kompozytu poliestrowo-szklanego.
The article presents the results of ballistic resistance investigations on three-layered samples with diameter of 50 mm, penetrated with a 7,62 mm bullet. Outer layers, each of 6 mm in thickness, were made of alloy AlZn5Mg2CrZr. Replaceable interlayer was made of polyester-glass composite before and after its modification, which required addition of 20% of recycled agent. It was shown that the modified interlayer made of polyester-glass composite does not improve ballistic resistance of the investigated alloy AlZn5Mg2CrZr, as compared to the non-modified one.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2007, R. 48 nr 1 (168), 1 (168); 15-26
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania stabilności zawiesiny metalowo-ceramicznej po wielokrotnym przetopie kompozytu na bazie stopu aluminium A359 zbrojonego cząsteczkami Al2O3
Stability of metal-ceramic slurry after multiple re-melting of A359 aluminum alloy based composite reinforced with Al2O3 particles
Autorzy:
Pietrzak, K.
Sobczak, N.
Sobczak, J. J.
Klasik, A.
Kudyba, A.
Darłak, P.
Długosz, P.
Wojciechowski, A.
Sienicki, E.
Powiązania:
https://bibliotekanauki.pl/articles/391876.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
kompozyty
recykling
wielokrotny przetop
stabilność zawiesiny metalowo-ceramicznej
metoda kropli leżącej
metal matrix composites
recycling
multiple re-melting
stability of metal-ceramic slurry
sessile drop method
Opis:
Metodę kropli leżącej zaadaptowano do badań wpływu wielokrotnego przetapiania i odlewania metalowych materiałów kompozytowych na strukturalną stabilność zawiesiny metalowo-ceramicznej. Do badań stosowano komercyjny kompozyt o osnowie stopu aluminium A359 (AlSiMg) firmy DURALCAN zawierający ok. 20% obj. cząsteczek tlenku glinu. Kompozyt poddano 10-krotnemu przetopieniu i odlewano, stosując dwa procesy znacznie różniące się czasem krzepnięcia zawiesiny metalowo-ceramicznej, tj. odlewanie grawitacyjne oraz prasowanie w stanie ciekłym (squeeze casting). Próbki kompozytu po każdorazowym cyklu przetopu i odlewania poddano badaniom wysokotemperaturowym na podłożu z tlenku glinu w próżni w temperaturze 850°C w ciągu 30 min. Zarówno bezpośrednia obserwacja zachowania próbek kompozytu podczas ich nagrzewania, jak i analiza strukturalna zakrzepłych próbek wykazała, że podczas topienia powstająca kropla zawiesiny metalowo-ceramicznej nie ulega rozwarstwianiu i zachowuje stabilność w badanym okresie czasowym, niezależnie od liczby przeprowadzonych przetopów i zastosowanego następnie sposobu odlewania kompozytu. Uzyskane wyniki potwierdzają dotychczasowe badania wskazujące na możliwość wielokrotnego przetapiania i ponownego odlewania kompozytów metalowych bez istotnej utraty ich właściwości użytkowych. Stwierdzona wysoka stabilność pierwotnej jednorodności zawiesiny metalowo- -ceramicznej upoważnia do zakwestionowania powszechnie akceptowanej tezy o nieprzydatności odlewanych kompozytów metalowych do recyklingu.
The sessile drop method was adopted to investigate the effect of multiple re-melting and casting of metal matrix composite on the structural stability of metal-ceramic slurry. Commercial aluminum matrix composite made of the A359Al alloy reinforced with about 20 vol. % Al2O3 particles was produced by DURALCAN and next re-melted and recast ten times using two casting methods, i.e. conventional gravity casting and squeeze casting. The samples taken from all composite ingots produced after every cycle of re-melting and re-casting were used for high temperature tests at a temperature of 850°C for 30 min, under vacuum conditions. Both direct observations of the behavior of composite samples placed on alumina substrates during their contact heating and at the test temperature as well as the detailed structural characterization of solidified droplets have shown high structural stability of the metalceramic slurry, irrespective of the number of re-melts and type of casting process used afterwards. The high stability of the originally obtained composite microstructure in each subsequent re-melting step in this study also entitles one to question the widely accepted opinion on the difficulties with re-melting of cast composites, and thus their unsuitability for recycling.
Źródło:
Prace Instytutu Odlewnictwa; 2017, 57, 2; 69-84
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strength of Joints with “Hi-Lok” Fasteners in Aircraft Safety Considerations
Autorzy:
Kłonica, Mariusz
Bielawski, Radosław
Powiązania:
https://bibliotekanauki.pl/articles/101896.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
aluminium alloy
carbon composite
surface layer
surface roughness
stop aluminium
kompozyt węglowy
warstwa powierzchniowa
chropowatość powierzchni
Opis:
This paper reports on the results of strength tests of single-lap joints used in the aerospace industry with “Hi-Lok” fastener. The samples subjected to testing were made of EN-AW 2024 aluminium alloy and carbon composite. A part of the samples was additionally sealed with the use of Naftoseal MC-780 Class C sealant. The application of the MC-780 Class C sealant boosts the strength of a single lap joint of EN-AW 2024 T3 Al alloy and carbon composite. The strength test results were complemented with the analysis of selected 2D and 3D surface roughness parameters, and isometric images of the analysed surfaces. Additional information on the specimen surface quality was provided with photographic images taken with Keyence VHX-5000 microscope at x300 magnification. In the conclusion section of this paper, the study is summarised and its key findings are listed.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 4; 87-93
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aluminosilcate glass cenospheres as a component of cast magnesium matrix composites
Autorzy:
Kamieniak, J.
Żydek, A.
Braszczyńska-Malik, K. N.
Powiązania:
https://bibliotekanauki.pl/articles/382002.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AZ91 magnesium alloy
aluminosilicate cenospheres
metal matrix composite
stop magnezu AZ91
mikrosfera glinokrzemianowa
kompozyt metalowy
Opis:
The main characteristic of aluminosilicate glass cenospheres and their possible use as a component of magnesium matrix composites were presented. The results revealed that particular parts of cenospheres differ insignificantly from each other and it depends on which power plant cenospheres come from. The characteristic of cenospheres concerned their structure and phase composition and dimensions such as: wall thickness and size of pores occurring in walls, depending on cenospheres origin. Thickness of cenospheres walls and pore size were measured by using ImageJ computer software. The structure of aluminosilicate glass cenospheres and their phase composition have been investigated by scanning electron microscopy and X-ray diffraction (XRD). The possibility of cenospheres utilization in the fabrication of magnesium matrix composites was presented on the example of AZ91 magnesium alloy composite with fly ash cenospheres. Composite was fabricated by pressure infiltration method.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 109-112
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties and advanced subjects in shape memory alloys and polymers
Autorzy:
Matsui, R.
Takeda, K.
Tobushi, H.
Pieczyska, E. A.
Powiązania:
https://bibliotekanauki.pl/articles/281495.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
shape memory alloy
shape memory polymer
functionally-graded shape memory material
shape memory composite
Opis:
Advanced subjects in mechanical properties of shape memory alloys and polymers are discussed. In the subloop loading under a stress-controlled condition of the shape memory alloy, the transformation-induced stress relaxation appears due to variation in temperature. The enhancement of corrosion and corrosion fatigue life of the shape memory alloy is discussed. The development of a functionally-graded shape memory alloy and polymer is expected to obtain better performance. Three-way motion appears in the shape memory composite with the shape memory alloy and polymer.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 2; 447-456
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of Aluminum Matrix Composite Reinforced with Al0.5CoCrCuFeNi High-Entropy Alloy Particles
Autorzy:
Kim, Min Sang
Son, Han Sol
Joo, Gyeong Seok
Kim, Young Do
Choi, Hyun Joo
Kim, Se Hoon
Powiązania:
https://bibliotekanauki.pl/articles/2174583.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum matrix composite
high entropy alloys
reinforcement
powder-in-tube
stir casting
Opis:
The aluminum composite with dispersed high entropy alloy were developed by stir casting involving the powder-in-tube method. First, Al0.5CoCrCuFeNi high entropy alloy (HEA) powder was made by mechanical alloying, and the powder was extruded in a tube-type aluminum container to form HEA precursor. The extruded HEA precursor was then dispersed in the aluminum matrix via stir casting. As a result, Fe-Cr-Ni based high-entropy phases was uniformly formed in the aluminum matrix, revealing ~158, 166, 235% enhancement of tensile strength by incorporating 1, 3, and 5 wt% HEA particles, respectively.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1543--1546
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities of Fabricating Mg-Al-RE Cast Magnesium Matrix Composites Reinforced with Ti Particles
Autorzy:
Przełożyńska, E.
Braszczyńska-Malik, K. N.
Powiązania:
https://bibliotekanauki.pl/articles/379632.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium matrix composite
Mg-Al-Mn alloy
rare earth elements (REE)
Ti particle
microstructure investigations
kompozyt magnezowy
stop Mg-Al-Mn
pierwiastki ziem rzadkich
cząstka Ti
badania mikrostruktury
Opis:
The results of microstructure investigations of an experimental magnesium matrix composite reinforced with Ti particles are presented. The experimental Mg-5Al-5RE magnesium alloy was used as the matrix alloy. The examined composite was reinforced with 30 wt% titanium spherical particles. The investigated material was obtained by the stir-casting method. The microstructure of the fabricated composite was characterized by a uniform arrangement of the Ti particles within the magnesium matrix. No new phases (created due to reaction between the matrix and Ti particles) were revealed by XRD techniques.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3 spec.; 73-76
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and Fatigue Life of the A359 Alloy Reinforced with Al2O3 after Multiple Remelting
Autorzy:
Pietrzak, K.
Klasik, A.
Maj, M.
Sobczak, J.
Wojciechowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/380378.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
A359 alloy
composite microstructure
mechanical properties
multiple remelting
stop A359
mikrostruktura kompozytu
właściwości mechaniczne
przetapianie wielokrotne
Opis:
The multiple direct remelting of composites based on the A359 alloy reinforced with 20% of Al2O3 particles was performed. The results of both gravity casting and squeeze casting were examined in terms of the obtained microstructure and mechanical characteristics. In microstructure examinations, the combinatorial method based on phase quanta theory was used. In mechanical tests, the modified low cycle fatigue method (MLCF) was applied. The effects obtained after both gravity casting and squeeze casting were compared. It was noted that both characteristics were gradually deteriorating up to the tenth remelting. The main cause was the occurrence of shrinkage porosity after the gravity casting. Much better results were obtained applying the squeeze casting process. The results of microstructure examinations and fatigue tests enabled drawing the conclusion that the A359 alloy reinforced with Al2O3 particles can confer a much better fatigue life behavior to the resulting composite than the A359 alloy without the reinforcement. At the same time, comparing these results with the results of the previous own research carried out on the composites based also on the A359 alloy but reinforced in the whole volume with SiC particles, it has been concluded that both types of the composites can be subjected to multiple remelting without any significant deterioration of the structural and mechanical characteristics. The concepts and advantages of using the combinatorial and MLCF methods in materials research were also presented.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 39-44
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Własności trybologiczne materiałów kompozytowych na osnowie stopu aluminium 7075 umacnianych włóknami Al2O3
Tribological properties of Al 7075 alloy based composites strengthened with Al2O3 fibres
Autorzy:
Naplocha, K.
Kaczmar, J. W.
Powiązania:
https://bibliotekanauki.pl/articles/381055.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
materiał kompozytowy
stop 7075
włókno AI2O3
tarcie suche
composite material
7075 alloy
Al2O3 fibre
dry sliding
Opis:
Badano odporność na zużycie ścierne materiałów kompozytowych na osnowie stopu aluminium 7075 umacnianych włóknami Al2O3 Saffil. Pomiary przeprowadzono metodą pin-on-disc w warunkach tarcia suchego dociskając próbki do obracającej się żeliwnej tarczy. Określono wpływ ciśnienia wywieranego przez próbki oraz ukierunkowania włókien, w stosunku do powierzchni ścieranej na stopień zużycia. Materiały wytwarzano metodą prasowania w stanie ciekłym nasycając stopem aluminium 7075 kształtki ceramiczne z włókien Saffil o porowatości 80-90%. Odporność na zużycie materiałów kompozytowych, w stosunku do nieumocnionego stopu 7075, była nieznacznie gorsza przy mniejszym ciśnieniu 0,8MPa wywieranym przez próbkę z kompozytu na żeliwną tarczę. Pod większym ciśnieniem 1,2 MPa odporność stopu nieumocnionego była jeszcze lepsza, a ukierunkowanie włókien w materiałach kompozytowych nie miało większego znaczenia na zużycie. Zaobserwowano również znaczne zużycie przeciwpróbki, gdyż zużyty materiał kompozytowy wraz z rozdrobnionymi włóknami Al2O3 pełnił rolę ścierniwa. Wzrost odporności na ścieranie materiałów kompozytowych na osnowie stopu 7075 uzyskano po zastosowaniu umocnienia zawierającego oprócz włókien Al2O3 również włókna C.
Wear resistance of 7075 aluminium alloy based composite materials reinforced with Al2O3 Saffil fibres was investigated. The measurements of wear were performed applying the pin-on-disc method at dry friction conditions with the gray iron counterpart. The effects of pressure of composite samples on the counterpart made of gray iron and the orientation of fibers in relation to the friction surface on wear rate were determined. The materials were produced by squeeze casting method where 80-90% porous ceramic preform were infiltrated. After T6 heat treatment hardness increased about 50-60% both for unreinforced alloy and composites containing strengthening Saffil fibres. Wear resistance of composite materials in relation to the unreinforced 7075 alloy was slightly worse at lower pressure of 0.8 MPa. Under higher pressure of 1.2 MPa wear resistance of unreinforced 7075 alloy was even better whereas no effect of orientation of fibers on wear in composite materials was observed. Additionally, significant wear of counterface in the presence of debris with fragmented Al2O3 fibres as abrasives was observed. Wear resistance improvement of composite materials was obtained when with alumina Saffil fibres Carbon C fibres in the preforms were applied.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 153-158
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Review of new developments in machining of aerospace materials
Autorzy:
Jemielniak, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1428707.pdf
Data publikacji:
2021
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
machining
aerospace materials
nickel alloy
titanium alloy
composite
Opis:
The paper presents an update of the recent literature on advances in machining of difficult to machine materials such as nickel and titanium-based alloys, and composites used in aeroengine and aerostructure applications. The review covers the following issues: advances in high-performance cooling techniques as cryogenic machining, minimum quantity lubrication, the combination of MQL and cryogenic cooling, and high-pressure lubricoolant supply and hybrid cutting processes – vibration assisted machining (both low and high frequency), laser, plasma and EDM assisted machining. Examples of applications in industrial processes are also given.
Źródło:
Journal of Machine Engineering; 2021, 21, 1; 22-55
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using Electrochemical Noise Technique to Evaluate the Corrosion Performance of a Reinforcement Magnesium Alloy
Autorzy:
Gobara, M.
Powiązania:
https://bibliotekanauki.pl/articles/412023.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
EN
Composite materials
corrosion
AZ91D alloy
Harrison solutions
Opis:
AZ91D magnesium alloy was reinforced by titanium and boron carbides under an inert environment using in-situ reactive infiltration technique. The corrosion properties of the reinforced magnesium alloy were investigated using Electrochemical noise (EN) techniques in dilute Harrison solutions. The moving average removal (MAR) method was used as trend removal methods. The frequency of pitting events (ƒn) and the average charge in each pitting events (q) were calculated for each EN measurements. EN results shows that the addition of reinforcement improved the corrosion resistance of the magnesium alloy (R-Mg) and no signs of corrosion were observed during 10 days of immersion in the corrosive solution.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2015, 40; 61-72
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Analysis of the Features of Cast Composite Materials Based on Light Alloys Reinforced by Particles
Autorzy:
Dan, Olena
Powiązania:
https://bibliotekanauki.pl/articles/2056036.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
aluminium
magnesium
alloy
composite material
matrix
reinforcing particles
Opis:
Light alloys are widely used in industry and everyday life due to their high physical and mechanical properties, wear and corrosion resistance, as well as low cost. In this regard, the use of light alloys as a basis for composite materials is both justified and expedient. The potential of these materials has not been fully used to this day, despite the growing interest in metal matrix composites and extensive investigations aimed at the development of production technology and the introduction of advanced systems based on light matrices. The article presents a short review of the analysis of the main components of the technology of cast composite materials based on light alloys of aluminum and magnesium reinforced by particles. Particular attention is paid to the choice of the matrix alloy, the type, size and amount of reinforcing particles introduced into it, as well as the thermal-time and kinetic parameters of the process.
Źródło:
Journal of Casting & Materials Engineering; 2022, 6, 1; 8--13
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Heat Treatment on Abrasive Wear Resistance of Silumin Matrix Composite Castings
Autorzy:
Gawdzińska, K.
Bryll, K.
Nagolska, D.
Powiązania:
https://bibliotekanauki.pl/articles/352168.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metal composite castings
thermal treatment
tribology
aluminium alloy
Opis:
The authors attempted at examining the effect of heat treatment on abrasive wear resistance of metal composite castings. Metal matrix composites were made by infiltrating preforms created from unordered short fibers (graphite or silumin) with liquid aluminium alloy AlSi12(b). Thus prepared composites were subject to solution heat treatment at a temperature of 520°C for four hours, then aging at a temperature of 220°C for four hours. Abrasion resistance of the material was tested before and after thermal treatment.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 177-182
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gradientowe kompozyty epoksydowe napełniane stopem Wood’a
Graded epoxy composites filled with Wood’s alloy
Autorzy:
Wierzbicki, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/279111.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
materiał polimerowy
materiał gradientowy
polimerowe materiały gradientowe
PGM
tworzywo polimerowe
napełniacz
kompozyt gradientowy
kompozyt epoksydowy
stop niskotopliwy
stop Wooda
żywica epoksydowa
polymeric material
gradient material
polymeric gradient materials
polymer
filler
graded composite
epoxy composite
low melting alloy
Wood's alloy
epoxy resin
Opis:
Artykuł opisuje funkcjonalne polimerowe materiały gradientowe podstawowe techniki ich wytwarzania oraz wyniki badań wybranych charakterystyk fizycznych. W badaniach wykorzystano stop Wood’a oraz żywicę epoksydową (Epidian 6) sieciowaną trietylenotetraaminą (utwardzacz Z1). Wykonane kompozyty zawierały nominalnie 20, 40, 60 i 80 % stopu Wood’a. Próbki wykonano metodą odlewania grawitacyjnego w formach umożliwiających sedymentację składników kompozytu. Następnie przedstawiono wyniki badań wytrzymałości warstw o różnej zawartości procentowej napełniacza.
The article describes the functional polymeric graded materials and their basic manufacturing techniques and the results of selected physical characteristics. In the research Wood’s alloy and epoxy resin (Epidian 6) cured with triethylenetetraamine (Z1 hardener) were used. Composites were made with nominally 20, 40, 60 and 80% by weight contents of the Wood’s alloy. The samples were made using gravity casting to the forms which allow to sedimentation of the components of composite. Next results of strength of the layers with different percentages of filler are presented.
Źródło:
Przetwórstwo Tworzyw; 2015, T. 21, Nr 2 (164), 2 (164); 182-186
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electroless Nickel Plating on AM60B Magnesium Alloy via Ti-Zr/Sol-Gel Composite Layer as Pretreatment
Autorzy:
Nazari, Zhale
Seifzadeh, Davod
Rajabalizadeh, Zahra
Powiązania:
https://bibliotekanauki.pl/articles/2125541.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sol-gel
Mg alloy
electroless plating
Opis:
The Ti-Zr and Ti-Zr/sol-gel were used as pretreatment layers before the electroless nickel coating on AM60B magnesium alloy. Scanning Electron Microscopy was employed to investigate the surface morphology of the pretreated layers and applied electroless coatings. Chemical analysis of the Ti-Zr layer, and nickel coatings was done using the Energy-Dispersive X-ray Spectroscopy. Moreover, the X-ray Diffraction and Atomic Force Microscopy methods were utilized to evaluate the microstructure and surface roughness of the electroless coatings, respectively. Electrochemical Impedance Spectroscopy was employed to study the corrosion behavior of Ni-P coatings. The results show that Ti-Zr layer has structural cracks, and the sol-gel film was covered all cracks entirely. The cauliflower-like electroless nickel coating was applied on both mentioned pretreated layers. The cross-sectional images revealed the higher thickness for the electroless coating on Ti-Zr/sol-gel layer, probably due to a large number of Ni nucleation centers. The EIS results demonstrate that the electroless coating on Ti-Zr/sol-gel has high corrosion protection and microhardness value.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 913--920
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration control using a modern control system for hybrid composite flexible robot manipulator Arm
Autorzy:
Ramalingam, S.
Mohideen, S. Rasool
Powiązania:
https://bibliotekanauki.pl/articles/27314189.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
composite material
Al6082 alloy
simulation analysis
vibration amplitude
LQR controller
Opis:
In this research, a model of a robotic manipulator flexible structure and an equation of motion for controller design is planned. The structural material chosen for the robot structure was a hybrid composite. A comparison study was carried out for the aluminium 6082 alloy for the flexible manipulator arm application. Vibration behavior and control implementation was analyzed by adding joint flexibility in the system. Using a simulation algorithm, the system parameter calculation is carried out through MATLAB software for vibration amplitude, transient period, steady-state error, and settling time of flexible robotic arm system. In a systematized motion equation, flexible robotic deflections are organized via the assumed mode (AM) and Lagrange techniques (LT). The graph analysis of hybrid composite and AL6082 materials with high stiffness coefficients is plotted. These obtained values from the plot are utilized for Linear Quadratic Regulator (LQR) controller design. The LQR output facts for both aluminium structural robotic arm and composite material robotic arms are established.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2022, 16, 2; 36--45
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The structure of composite rollers with iron or nickel-iron base and hard surface layer of WC or TiC based hard alloy produced by the method of hot vacuum pressing with a liquid phase
Autorzy:
Kaverinskiy, Vladislav
Sukhenko, Zoya
Powiązania:
https://bibliotekanauki.pl/articles/2065773.pdf
Data publikacji:
2020
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
composite rollers
iron-nickel materials
powder metallurgy
hard alloy
thermocycling sustainability
Opis:
In this work the structure and properties of composite rollers with surface layer made of hard alloy were studied. The rollers were made by the powder metallurgy method with sintering during pressing and the presence of a certain liquid phase during sintering (semi-liquid sintering). WC-Co and TiC-Ni-Fe materials were used as hard alloys. Iron-carbon and iron-nickel materials were used as soft base. All of the composite layers were formed in one process. The structure of base materials and border layer of these composites were studied. Investigations of thermocycling sustainability of these composite samples were carried out.
Źródło:
Archives of Mechanical Technology and Materials; 2020, 40; 20--29
2450-9469
Pojawia się w:
Archives of Mechanical Technology and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantitative analysis of reinforcing phase in AlSi11/CrFe30C8 composite castings
Autorzy:
Dulęba, A.
Scelina, D.
Cholewa, M.
Powiązania:
https://bibliotekanauki.pl/articles/380622.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
composite casting
alloy segregation
electromagnetic field
odlew kompozytowy
segregacja stopu
pole elektromagnetyczne
Opis:
In this paper assessment of the morphology and segregation of the reinforcing phase based on optical quantitative analysis was achieved. Microscopic observation of AlSi11/CrFe30C8 composite gravity castings was carried out in electromagnetic field. The purpose of investigation was the analysis of current frequency influence supplying the inductor of electromagnetic field on segregation, quantity and morphology of reinforcement phase in aluminum matrix composite. Technological conception of investigations was based on assumption that chromium-iron matrix of particles dissolved in aluminum composite matrix and carbide phases became actual reinforcement of the composite. Gravity segregation was analyzed. Graphs containing distribution of reinforcing phase in metal matrix were shown.
Źródło:
Archives of Foundry Engineering; 2011, 11, 3 spec.; 49-56
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of Melt-Spun Al-20Si-5Fe Alloy and Boron Carbide (B4C) Composite Material
Autorzy:
Kilicaslan, M. F.
Uzun, A.
Karakose, E.
Powiązania:
https://bibliotekanauki.pl/articles/353146.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metal matrix composite
rapid solidification
Al-Si alloys
Opis:
In this study, metal matrix composite materials containing melt-spun Al-20Si-5Fe alloys and boron carbide was produced by high energy ball milling and then hot pressing at 200 MPa pressure and 450°C. Mechanical and microstructural characterizations were performed by using an optical microscopy, X-Ray diffractometer, and dynamic microhardness tester. It was observed that boron carbide particles were homogenously distributed in the microstructure and values of microhardness and elastic modules were averagely 830 MPa and 42 GPa, respectively.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 597-600
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kompozytowa powłoka PEEK /Bioszkło® na stopie tytanu Ti-6Al-7Nb do zastosowań w medycynie
Composite polyetheretherketone/ Bioglass® coating on Ti-6Al-7Nb alloy for medical application
Autorzy:
Moskalewicz, T.
Seuss, S.
Boccaccini, A. R.
Kot, M.
Czyrska-Filemonowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/284982.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
stop tytanu
powłoka kompozytowa
PEEK
bioszkło
titanium alloy
composite coating
bioglass
Opis:
Kompozytową powłokę polieteroeteroketon (PEEK)/ Bioszkło osadzono metodą elektroforezy na stopie tytanu Ti-6Al-7Nb. W celu poprawy przyczepności powłoki do podłoża próbkę poddano wyżarzaniu po obróbce powierzchniowej. Mikrostrukturę powłoki charakteryzowano za pomocą mikroskopii świetlnej oraz skaningowej- i transmisyjnej mikroskopii elektronowej. Powłoka była jednorodna i porowata, nie stwierdzono obecności pęknięć. Powłoka zbudowana była z cząstek bioszkła rozmieszczonych w polimerowej osnowie. Wyniki liniowej analizy składu chemicznego wykonanej metodą STEM-EDS wskazują na dyfuzję Na ze szkła do polimeru podczas wygrzewania próbki.
A composite polyetheretherketone (PEEK)/Bioglass® coating was electrophoretically deposited on the Ti-6Al-7Nb substrate. Post heat treatment was performed to improve the adhesion of the coating to the substrate. The microstructure of the coating and a substrate was examined by light microscopy, scanning- and transmission electron microscopy methods. The coating is uniformly porous, without any cracks or presence of large voids. The coating is composed of Bioglass® particles embedded in a PEEK matrix. STEM-EDS line analysis revealed diffusion of Na from the glass to the PEEK.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 13-15
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical Properties and Microstructure of WE43 Magnesium Matrix Composite Reinforced SiC Particles
Autorzy:
Rzychoń, T.
Dybowski, B.
Gryc, A.
Dudek, M.
Powiązania:
https://bibliotekanauki.pl/articles/380522.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium matrix composite
microstructure
WE43 alloy
stir casting
stop magnezu
kompozyt
stop WE43
mikrostruktura
Opis:
Magnesium alloys containing yttrium and neodymium are known to have high specific strength, good creep and corrosion resistance up to 250°C. The addition of ceramic particles strengthens the metal matrix composite resulting in better wear and creep resistance while maintaining good machinability. In the present study, WE43 magnesium matrix composite reinforced with SiC particles were fabricated by stir casting. The microstructure of the composite was investigated by optical microscopy, quantitative metallography, scanning electron microscope and XRD analysis. Microstructure characterization of WE43 MMC showed homogeneous reinforcement distribution and presence of the small amount of porosity at the interface. A thin layer consists of zirconium-rich particles was observed at the interface. In the microstructure, inclusions of the yttrium oxide were found. The presence of SiC particles assisted in improving hardness and in decreasing the ultimate tensile strength, yield tensile strength and elongation.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1 spec.; 99-102
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Heat Treatment on Properties of Ni-B/B Composite Coatings
Autorzy:
Mazurek, A.
Bartoszek, W.
Cieślak, G.
Gajewska-Midziałek, A.
Oleszak, D.
Trzaska, M.
Powiązania:
https://bibliotekanauki.pl/articles/352856.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ni-B/B composite coating
Ni-B alloy coating
boron powder
heat treatment
Opis:
The results of research on preparations of alloy Ni-B/B composite coatings produced by chemical reduction method on a carbon steel substrate are collected in this paper. The alloy Ni-B coatings were also investigated for comparative purposes. The produced coatings were subjected to a heat treatment process. The boron powder with the particles size below 1 μm was used as the dispersion phase. The structure of the coatings was examined by X-ray diffraction method. Boron powder particles as well as surface morphology and topography were characterized by scanning electron microscopy. The roughness test, microhardness and corrosion resistance by potentiodynamic method and surface wettability tests were carried out. Analysis of the chemical composi-tion by the EDS method showed that the boron powder particles were evenly embedded in the entire volume of the coating. Ni-B/Bcomposite coatings are characterized by higher hardness than alloy Ni-B coatings. As a result of heat treatment, the Ni3 B phase crystallized, which increased the hardness of the coating material. The incorporation of boron powder particles and heat treatment reduce the corrosion resistance of coatings. All produced coatings exhibited hydrophobic properties.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 839-844
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Titanium Metal Matrix Composite Surface Layers Produced During Laser Gas Nitriding of Ti6Al4V Alloy by Different Types of Lasers
Autorzy:
Lisiecki, A.
Powiązania:
https://bibliotekanauki.pl/articles/351670.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
titanium alloys
laser gas nitriding
composite surface layer
disk laser
diode laser
Opis:
The article presents the results of a comparative study of the nitriding process of titanium alloy substrate using two lasers with different characteristics of laser beams. One of the applied lasers was a high power diode laser emitting at a dominant wavelength of 808 nm, with a rectangular laser beam spot, and multimode energy distribution across the spot. The second laser was a solid state Yb:YAG disk laser emitting at a wavelength of 1.03 μm, with a circular beam spot, characterized by near Gaussian energy distribution across the spot. In a case of both lasers single stringer beads with a similar width and at similar energy input were produced. As a result of melting of the substrate with a laser beam in a pure gaseous nitrogen atmosphere composite surface layers with in situ precipitated titanium nitrides embedded in the metallic matrix of titanium alloy were produced, in both cases. However, the surface topography and structure is different for the surface layers produce by different lasers at the same processing parameters and width of laser beams.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 4; 1777-1784
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Layer Thickness on the Reflectance of a Quasi One-Dimensional Composite Built with Zr55Cu30Ni5Al10 Amorphous Alloy and Epoxy Resin
Autorzy:
Garus, Sebastian
Sochacki, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2049717.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
amorphous alloy
aperiodic multilayer
mechanical waves
phononic crystal
bandgap
Opis:
The study examined the impact of the angle of incidence of mechanical waves on various types of quasi one-dimensional superlattice. Binary periodic structure, quasi-periodic distribution of Thue-Morse layers and Severin’s aperiodic multilayer were used. Using the concatenation and recursive rules, the distribution of layers was determined for individual structure types for generation numbers equal to 3, 4 and 5. The structures were selected so that the thickness of the composite was the same for each type of distribution for a given generation number value. Transfer Matrix Method algorithm was used to determine reflectance. The band structure of reflectance has been demonstrated for incidence angles up to 90 degrees at mechanical wave frequencies up to 50 kHz. The existence of wide bands of high reflectance above the acoustic frequencies was demonstrated for the analyzed structures. Increasing the layer thickness caused an inhomogeneous shifts of transmission peaks towards lower frequencies.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 2; 503-510
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of adhesively bonded joints of aluminum sheets for application as the core of composite beams
Ocena adhezyjnych połączeń blach aluminiowych do aplikacji jako trzon belek kompozytowych
Autorzy:
Derlatka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2175032.pdf
Data publikacji:
2021
Wydawca:
Politechnika Częstochowska
Tematy:
aluminium alloy
adhesively bonded joints
composite structures
stop aluminium
połączenia adhezyjne
konstrukcje kompozytowe
Opis:
The paper presents an evaluation of joints resulting from adhesively bonded aluminum sheets. The aim of the study was to assess the possibility of applying this type of connection for the construction of composite beams. The results of experimental tests on the shear test of joints are presented. Four types of connectors were the subjects of the research. The joints of the same geometry were made of four 1.6 mm thick sheets of aluminum alloy AA 7075-T6. Each type of joint was characterized by a different material joining the sheets: three of them were connected by acrylic foam tapes, one joint was made using two component toughened methacrylate adhesive. Three different double-sided acrylic foam tapes with different properties were tested. It has been assessed that the two-component toughened methacrylate adhesive can be used for the construction of the aluminum core applied in composite structures.
Dokonano oceny połączeń aluminiowych blach w wyniku adhezji. Celem pracy była ocena możliwości zastosowania tego typu połączeń do budowy belek kompozytowych. Zaprezentowano wyniki badań eksperymentalnych z próby ścinania złączy. Przedmiotem badań były cztery rodzaje złączy. Złącza o identycznej geometrii zbudowano z czterech blach ze stopu aluminium AA 7075-T6 o grubości 1.6 mm. Każdy typ złącza charakteryzował się innym materiałem łączącym blachy: trzy z nich połączono za pomocą akrylowych taśm piankowych, jedno złącze powstało z wykorzystaniem dwuskładnikowego, utwardzanego metakrylowego kleju. Przebadano trzy różne dwustronnie klejące akrylowe taśmy piankowe różniące się właściwościami. Oceniono, iż do budowy konstrukcji kompozytowych opartych na bazie trzonu aluminiowego istnieje możliwość zastosowania dwuskładnikowego, utwardzanego metakrylowego kleju.
Źródło:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2021, 27 (177); 30-36
0860-7214
Pojawia się w:
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cooling Characteristic and Microstructure of Ni-Si-B-Ag Alloy
Autorzy:
Wojciechowska, M.
Ziewiec, K.
Mucha, D.
Powiązania:
https://bibliotekanauki.pl/articles/356071.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
amorphous/crystalline composite
scanning electron microscopy
X-ray diffraction
thermography
melt spinning
Opis:
The aim of this work was to investigate the possibility of obtaining an amorphous/crystalline composite starting from Ni-SiB-based powder grade 1559-40 and silver powder. The alloy was produced using arc melting of 95% wt. Ni-Si-B-based powder (1559-40) and 5% wt. Ag powder. Ingot was re-melted on a copper plate and observed while cooling using a mid-wave infra-red camera. The alloy was then melt-spun in a helium atmosphere. The microstructure of the ingot as well as the melt-spun ribbon was studied using light microscopy and scanning electron microscopy with energy dispersive spectrometry. Phase identification was performed by means of X-ray diffraction. The observations confirmed an amorphous/crystalline microstructure of the ribbon where the predominant constituent of the microstructure was an amorphous phase enriched with Ni, Si, and B, while the minor constituent was an Ag-rich crystalline phase distributed in a film along the melt-spinning direction.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1357-1360
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioceramiczne warstwy kompozytowe wytwarzane metodą hybrydową na stopie Ti6Al4V
Bio-ceramic composite layers on Ti6Al4V alloy produced by hybrid method
Autorzy:
Surowska, B.
Bieniaś, J.
Wierzchoń, T.
Ossowski, M.
Rokita, M.
Powiązania:
https://bibliotekanauki.pl/articles/284804.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
metoda hybrydowa
stop Ti6Al4V
bioceramiczne warstwy kompozytowe
biomateriały tytanowe
hybrid method
Ti6Al4V alloy
titanium biomaterials
bio-ceramic composite layers
Źródło:
Engineering of Biomaterials; 2008, 11, 73; 15-17
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Temperature of the Beginning of Alloy Layer Forming Process on the Steel Cast
Autorzy:
Szajnar, J.
Walasek, A.
Baron, C.
Powiązania:
https://bibliotekanauki.pl/articles/381506.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ferrochromium
diffusion process
composite premould
żelazochrom
proces dyfuzyjny
wytłaczanie
Opis:
In this work the results of experiment connected with the problem of formation surface layers on the steel castings. There was an attempt to determine two factors: temperature (premould be higher up 1300°C) and time (heating composite premould). The purpose of the argument was prove of creation surface composit layer in the consequence of heat composite premould (to above temperature of 1300°C). The purpose of conducted research was tests control parameters (have an influence on diffusion process).
Źródło:
Archives of Foundry Engineering; 2013, 13, 1 spec.; 185-188
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mechanism of the surface alloy layer creation for cast steel
Autorzy:
Walasek, A.
Szajnar, J.
Powiązania:
https://bibliotekanauki.pl/articles/382489.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kompozyty
warstwa kompozytowa
żelazochrom
staliwo
composites
composite layer
ferrochromium
cast steel
mechanism of creation
Opis:
The paper presents a detailed description of the process of creation of a surface alloy layer (using high-carbon ferrochromium) on the cast steel casting. The mechanism of the surface alloy layer is based on the known theories [5,6]. The proposed course of formation of the layers has been extended to decarburization stage of steel. The research included proving the presence of carbon-lean zone. The experiment included the analysis of the distribution of elements and microhardness measurement.
Źródło:
Archives of Foundry Engineering; 2012, 12, 1; 115-118
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations on the Microstructure and Corrosion Performance of Different WC-Based Cermet Coatings Deposited by High Velocity Oxy Fuel Process onto Magnesium Alloy Substrate
Autorzy:
Jonda, Ewa
Łatka, Leszek
Maciej, Artur
Khozhanov, Aleksandr
Powiązania:
https://bibliotekanauki.pl/articles/2201928.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
AZ91 magnesium alloy
HVOF
thermal spraying
metal matrix composite coatings
microstructure
electrochemical corrosion
Opis:
In the field of surface engineering, thermal spraying is very wide adopted in many branches of the industry. The main reasons of such situation are its flexibility as well as cost effectiveness. Among others, High Velocity Oxy Fuel (HVOF) technique is dedicated for spraying hardmetal and cermet coatings, especially for wear- and corrosion resistance. Such type of coating could be a promising candidate as protective layer for magnesium alloys elements. These materials need a strong improvement in the corrosion protection as well as on the field of wear resistance in order to be widely used in the industry. In this work, different WC-based coatings, namely: (i) WC-Co, (ii) WC-Co-Cr and (iii) WC-Cr3C2-Ni manufactured by HVOF spraying, were investigated. The form of all feedstock materials was agglomerated and sintered powder. All coatings were sprayed with the same technological parameters, especially spray distance which was equal to 400 mm on the AZ91 magnesium alloy substrate. The main aim of the studies was to investigate the influence of the powder material on the corrosion resistance of obtained coatings. The manufactured coatings were examined in terms of its microstructure, using scanning electron microscope (SEM) and corrosion performance, which was assessed in the electrochemical corrosion investigations in 3.5% NaCl solution by Tafel method. The study showed that the corrosion resistance increasing in such order: AZ91 < WC-Cr3C2-Ni < WC-Co < WC-Co-Cr. It should be stressed that WC-Cr3C2-Ni coating exhibits very low corrosion performance, which could be effected by relatively high porosity (c.a. 3 vol.%) and because of that the more complex composition promotes creation of many corrosion cells.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 2; 25--35
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości materiałów kompozytowych na osnowie stopu aluminium EN AW-2024 i miedzi
The properties of the EN AW-2024 aluminium alloy and copper matrix composite materials
Autorzy:
Kurzawa, A.
Naplocha, K.
Kaczmar, J. W.
Powiązania:
https://bibliotekanauki.pl/articles/195897.pdf
Data publikacji:
2018
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
materiały kompozytowe
właściwości mechaniczne
infiltracja pod ciśnieniem
composite materials
mechanical properties
pressure infiltration
Opis:
W pracy zostały przedstawione wyniki badań wpływu umocnienia stopu EN AW-2024 cząstkami ceramicznymi α-Al2O3 oraz miedzi włóknami Saffil na wybrane właściwości mechaniczne. Materiały kompozytowe zostały wytworzone odlewniczą metodą infiltracji pod ciśnieniem preform ceramicznych charakteryzujących się porowatością otwartą. Stabilność termiczną oraz odporność na deformacje preform w trakcie procesu infiltracji zapewniono przez zastosowanie do ich budowy spoiwa krzemionkowego i odpowiedniej obróbki termicznej. W pracy, opierając się na badaniach struktury i analizy powierzchni przełomów badanych po wytrzymałościowych próbach technologicznych, wykazano wpływ umocnienia na mechanikę tworzenia złomu. Przeprowadzone badania wytworzonych materiałów potwierdziły ponadto ich bardzo dobre właściwości mechaniczne oraz eksploatacyjne, takie jak twardość i odporność na ścieranie, co tworzy zakres ich potencjalnych zastosowań w budowie środków transportu naziemnego.
In this paper investigations of the strengthening effect of α-Al2O3 particles and Saffil alumina fibres on the EN AW-2024 aluminium alloy matrix as well as Cu based composites on selected mechanical properties were presented. The examined composite materials were produced by pressure infiltration of open porosity preforms. Thermal stability and resistance to deformation of the preforms during the infiltration were provided by using a silica binder for reinforcing their structure and appropriate heat treatment. On the basis of microstructure and surface analysis of fractures obtained during strength investigations the effect of reinforcement and crack development were demonstrated. Performed tests of manufactured materials have also confirmed their superior mechanical and service properties, such as hardness and abrasion resistance, which widens the scope of their potential application.
Źródło:
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika; 2018, z. 90 [298], 3; 335-344
0209-2689
2300-5211
Pojawia się w:
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bending resistance of metal-concrete composite beams in a natural fire
Nośność na zginanie belek zespolonych metalowo-betonowych w pożarze naturalnym
Autorzy:
Chybiński, M.
Polus, Ł
Powiązania:
https://bibliotekanauki.pl/articles/395949.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
composite beams
fire
steel
stainless steel
aluminium alloy
open car park
belka zespolona
pożar
stal
stal nierdzewna
stop aluminium
garaż otwarty
Opis:
In this paper, the bending resistance of three metal-concrete composite beams was compared in real car fires in an open car park. Steel and concrete composite beams are often used for the construction of ceilings in multi-storey car parks. The authors made an attempt to evaluate how the replacement of a non-alloy steel girder with a stainless steel or aluminium alloy girder affects the bending resistance of a composite beam under fire conditions. The analysed beams were not fire-protected. They consisted of a concrete slab and a girder made of: non-alloy (carbon) S235J2 (1.0117) steel, X6CrNiMoTi17-12-2 (1.4571) stainless steel, and AW-6061 T6 (EN AW-Al Mg1SiCu) aluminium alloy.
W artykule porównano nośności na zginanie trzech wybranych belek zespolonych metalowo-betonowych w warunkach pożaru samochodów w otwartym garażu. Autorzy próbują ocenić jaki wpływ na nośność zginanej belki zespolonej ma zamiany dźwigara ze stali niestopowej na dźwigar ze stali nierdzewnej lub stopu aluminium. Przeanalizowano niezabezpieczone przed ogniem belki zespolone złożone z betonowej płyty oraz dźwigarów wykonanych z: stali konstrukcyjnej niestopowej S235J2 (1.0117), stali nierdzewnej X6CrNiMoTi17-12-2 (1.4571) lub stopu aluminium AW-6061 T6(EN AW-Al Mg1SiCu).
Źródło:
Civil and Environmental Engineering Reports; 2018, No. 28(4); 149-162
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and evaluation of the structure of Ni3Al/C alloy
Synteza i ocena struktury stopu Ni3Al/C
Autorzy:
Kmita, A.
Janas, A.
Hutera, B.
Powiązania:
https://bibliotekanauki.pl/articles/264017.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
aluminid
aluminid niklu
faza międzymetaliczna
kompozyt in situ
kompozyt naturalny
aluminides
nickel aluminide
intermetallic phases
in situ composite
natural composite
Opis:
The article specifies a method used for the manufacture of a new Ni-Al-C alloy with the description of alloy microstructure. When proper conditions are maintained, the said alloy after solidification forms a natural "in situ" Ni3Al/C composite. Particular attention was paid to the process of synthesis of Ni3Al phase by the technique of cost-effective melting and to the process of the formation of different graphite forms after the solidification in ceramic mould of casting characterised by different wall cross-sections, and hence by different heat transfer rates. Metallographic examinations were carried out by the commonly used techniques and by scanning electron microscopy. The use of the latter enabled the determination of the chemical composition of phases formed during casting process. The aim of the present studies was to evaluate the microstructure of this unique alloy. The phase morphologies were examined and their chemical composition was determined. These fundamental studies should enable the determination of conditions under which the graphite eutectic is formed in Ni-Al alloy and, as a consequence, the synthesis of Ni3Al/C composite.
W prezentowanym artykule przedstawiono metodę otrzymywania nowego stopu Ni-Al-C oraz opisano jego mikrostrukturę. Przy zachowaniu odpowiednich warunków stop ten, po procesie krystalizacji, tworzy naturalny kompozyt ,,in situ" Ni3Al/C. Zwrócono szczególną uwagę na proces syntezy fazy Ni3Al metodą OPW (oszczędnościowego procesu wytopu) i tworzenia się różnych form grafitu po procesie krystalizacji w formie ceramicznej, przy różnych grubościach odlewu, co za tym idzie, przy różnych prędkościach odprowadzenia ciepła. Do badań metaloznawczych wykorzystano tradycyjne metody metalograficzne oraz badania z wykorzystaniem mikroskopu skaningowego. Zastosowanie tego ostatniego umożliwiło określenie składu chemicznego faz, wytworzonych w procesie odlewniczym. Celem podjętych badań było dokonanie oceny mikrostruktury tego nietypowego stopu. Zbadano morfologię występujących faz i określono ich skład chemiczny. Te badania o charakterze podstawowym, pozwolą określić warunki powstawania eutektyki grafitowej w stopie Ni-Al, co w konsekwencji umożliwi syntezę kompozytu Ni3Al/C.
Źródło:
Metallurgy and Foundry Engineering; 2009, 35, 2; 147-154
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure investigation of ball milled composite powder based on AlSi5Cu2 alloy chips modified by SiC particles
Badania strukturalne mielonego proszku kompozytowego na osnowie wiór stopu aluminium modyfikowanych cząstkami SiC
Autorzy:
Suśniak, M.
Karwan-Baczewska, J.
Dutkiewicz, J.
Actis Grande, M.
Rosso, M.
Powiązania:
https://bibliotekanauki.pl/articles/353182.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AlSiCu alloy chips
recycling
powder metallurgy
mechanical alloying
Al-SiC composite powder
wióry stopu aluminium
recykling
metalurgia proszków
synteza mechaniczna
proszek kompozytowy Al-SiC
Opis:
The paper is focused on the processing of aluminum alloy chips using powder metallurgy. Chips obtained from recycled AlSi5Cu2 alloy were ball milled with the addition of silicon carbide powder with an average size of 2μm. Mechanical alloying process was employed to obtain homogeneous composite powder. The effect of processing time (0 - 40h) on the homogeneity of the system was evaluated, as well as a detailed study of the microstructure of AlSi5Cu2 aluminum chips and SiC particles during MA was carried out. Addition of silicon carbide (10, 20wt%) to recycled aluminium chips and application of MA lead to fragmentation of the homogeneous composite powder down to particle size of about 3μm and spheroidization. The addition of hard SiC particles caused reinforcement and reduced the milling time. Higher content of silicon carbide and longer processing time allowed to obtain AlSi5Cu2/SiC powders with microhardness ~500HV0,025. The results of MA were investigated with SEM, EDS, LOM, XRD and showed that relatively homogeneous distribution of SiC reinforcements in the matrix as well as grain refinement of aluminum solid solution down to 50nm can be obtained after 40h of processing.
W artykule przedstawiono metodę otrzymywania proszku kompozytowego na osnowie wiór stopu aluminium AlSi5Cu2 pochodzących z recyklingu z dodatkiem węglika krzemu (SiC-α, 2μm). Określono wpływ czasu mielenia oraz dodatku SiC na mikrostrukture i właściwości proszku kompozytowego.Dodatek SiC (10, 20%mas) do wiór stopu aluminium i zastosowanie mechanicznej syntezy pozwala na otrzymanie jednorodnego i drobnoziarnistego proszku o wielkości 3μm i kształcie zbliżonym do sferycznego. Dodatek twardych cząstek SiC powoduje umocnienie proszku oraz skrócenie czasu mielenia. Dodatek SiC i zastosowanie 40h mielenia pozwala otrzymać cząstki proszku o mikrotwardości około 500 HV0,025. Badania proszku kompozytowego przeprowadzone na mikroskopie optycznym, SEM oraz TEM potwierdziły jednorodne rozmieszczenie cząstek SiC w osnowie oraz zmniejszenie wielkości ziarna do 50nm po 40 godzinach procesu.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 2; 437-441
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
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