Informacja

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

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "alloys Al-Si" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-25 z 34
Tytuł:
Hypoeutectic Al-Si Alloy with Cr, V and Mo to Pressure Die Casting
Autorzy:
Szymczak, T.
Gumienny, G.
Stasiak, I.
Pacyniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/382365.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
krystalizacja
odlewanie ciśnieniowe
stopy wieloskładnikowe
stopy Al-Si
metoda DTA
crystallization
pressure die casting
multicomponent Al-Si alloys
alloys Al-Si
DTA method
Opis:
This paper presents the results of hypoeutectic 226 grade alloy as well as prepared on its basis Al-Si alloy containing Cr, V and Mo. The additives tested were added as AlCr15, AlV10 and AlMo8 master alloys. Alloys tested were poured into DTA sampler as well as using pressure die casting. An amount of Cr, V and Mo additives in alloy poured into DTA sampler comprised within the range approximately 0.05-0.35%. Alloys to pressure die casting contained 0.05-0.20% Cr, V and Mo. The crystallization process was examined using the derivative thermal analysis (DTA). The microstructure of castings made in the DTA sampler as well as castings made with use of pressure die casting were examined. The basic mechanical properties of castings made using pressure die casting were defined too. It has been shown in the DTA curves of Al-Si alloy containing approximately 0.30 and 0.35% Cr, Mo, and V there is an additional thermal effect probably caused by a peritectic crystallization of intermetallic phases containing the aforementioned additives. These phases have a morphology similar to the walled and a relatively large size. The analogous phases also occur in pressure die casting alloys containing 0.10% or more additions of Cr, V and Mo. The appearance of these phases in pressure die casting Al-Si alloys coincides with a decrease in the value of the tensile strength Rm and the elongation A. It has been shown die castings made of Al-Si alloys containing the aforementioned additives have a higher Rm and A than 226 alloy.
Źródło:
Archives of Foundry Engineering; 2017, 17, 1; 153-156
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Materials Properties of Iron-rich Intermetallic Phase in a Multicomponent Aluminium-Silicon Alloy
Autorzy:
Tupaj, M.
Orłowicz, A. W.
Mróz, M.
Trytek, A.
Powiązania:
https://bibliotekanauki.pl/articles/381828.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
alloys Al-Si
intermetallics phase
Fe-rich
primary crystals
silicon
stopy Al-Si
faza międzymetaliczna
wzbogacanie żelazem
kryształy pierwotne
krzem
Opis:
Available technical literature includes a number of reports on harmful effects connected with elevated content of iron in aluminium-silicon alloys but in case of pressure castings, alloys containing up to 2% Fe can be used. This follows from lesser susceptibility of such alloys to sticking to surfaces of metal moulds. One effect of iron presence in aluminium-silicon alloys is precipitation of iron-rich intermetallic phases. In the study reported in this paper it has been found that in a multicomponent aluminium-silicon alloy, the indentation hardness (HIT) and the elastic indentation modulus (EIT) of intermetallic phases occurring in the form of polyhedrons and/or their conglomerates, rich in aluminium, iron, silicon, manganese, and chromium, containing also copper, nickel, and vanadium, are higher than those measured for silicon crystals. This feature can be used to intentional modelling microstructure of mechanical parts which are expected to show high resistance to abrasive wear.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1 spec.; 111-114
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improved Mechanical Properties of Al-Si Alloys by Adding an Extrusion Process to Conventional Processing Method
Autorzy:
Han, J. Y.
Femi, O. E.
Kilicaslan, F.
Jeong, C. U.
Baeg, C. H.
Hong, S. J.
Koo, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/355114.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Si alloys
extrusion
mechanical properties
Opis:
In this study, the mechanical properties of Al-Si alloys was improved by selecting higher Si content and avoiding distortion in Al-Si matrix by adding an extrusion process such that the fabrication processes casting and extrusion were in sequence. Cast billets were extruded at ratios 4:1 and 10:1 to obtained two extruded bars with different processing parameters. The as-extruded samples were characterized and investigated for microstructure and mechanical properties. Optical Microscope was used to examined phase morphologies and microstructures of the extruded Al-Si bars. Mechanical properties were conducted on each sample to study the effectiveness of the additional extrusion process in high Si content Al-Si alloys. The result shows that by increasing the extrusion ratio, the size of the primary Si particle reduces leading to a higher density, better tensile and yield strength compared to the cast billet.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1179-1183
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of Aluminium-Silicon Near-Eutectic Alloy with Use of Electrolysis of Sodium Salt
Autorzy:
Białobrzeski, A.
Pezda, J.
Jarco, A.
Powiązania:
https://bibliotekanauki.pl/articles/351019.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Si alloys
electrolysis
tensile strength
microstructure
Opis:
The present work discusses results of preliminary tests concerning the technology of continuous dosage of sodium to a metallic bath from the aspect of modification of EN AC-44200 alloy, through the use of a multiple compound (salt) of sodium. The technology consists in continuous electrolysis of sodium salts occurring directly in a crucible with liquid alloy. As a measure of the degree of alloy modification over the course of testing, the ultimate tensile strength (UTS or Rm) and analysis of microstructure are taken, which confirm the obtained effects of the modification on the investigated alloy. Assurance of stable parameters during the process of continuous modification with sodium, taking into consideration the fact of complex physical-chemical phenomena, requires additional tests aimed at their optimization and determination of a possibility of implementation of such technology in metallurgical processes.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 2371-2374
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of silicon content on machinability of AL-SI alloys
Autorzy:
Akyüz, B.
Powiązania:
https://bibliotekanauki.pl/articles/102852.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
machining
cutting force
mechanical properties
Al-Si alloys
Opis:
In this study the effect of the change in the amount of Silicon (Si) occuring in Al-Si alloys on mechanical and machinability properties of the alloy was investigated. The change in mechanical properties and microstructure, which depends on the increase in Si percentage, and the effects of this change on Flank Build-up (FBU), wear on the cutting edge, surface roughness, and machinability were also studied. Alloys in different ratios of Si (i.e. 2 to 12 wt %), were employed in the study. The specimens for tests were obtained by casting into metal moulds. The results obtained from experimental studies indicate improved mechanical properties and machinability, depending on the rise in Si percentage in Al-Si alloys. It is also observed that the increase in Si percentage enhanced surface quality.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 31; 51-57
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
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:
Effect of Solution Treatment on Age-Hardening Behavior of Al-12Si-1Mg-1Cu Piston Alloy with Trace-Zr Addition
Autorzy:
Kaiser, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/106951.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Al-Si alloys
trace addition
solutionizing
age hardening, resistivity
Opis:
The influence of a solution treatment with a trace zirconium addition on the precipitation behavior of a cast Al-12%Si-1%Mg1%Cu piston alloy has been reported. The alloys were prepared by controlled melting and casting. The cast alloys were given an age-hardening treatment having a sequence of homogenization, T6 solutionizing, quenching, and aging. Both the cast and solutionized samples were naturally aged for 58 days, isochronally aged for 60 minutes at different temperatures (up to 350°C), and isothermally aged at various temperatures (up to 225°C) for different periods of time (ranging from 15 to 360 minutes). The hardness values of the differently processed alloys were measured to understand the aging behavior of the alloys. Electrical resistivity changes with aging time and temperature were measured to understand the precipitation behavior of the alloys. It is observed that significant hardening takes place in the aged alloys due to the formation of GP zones as well as the formation of metastable phases. The solutionizing treatment improves the hardness because some alloying elements are re-dissolved during solution treatment to produce a solute-rich solid solution. The trace-added Zr hinders the softening due to the precipitation of Al3Zr, which is very stable against coarsening and the re-dissolution of precipitates. Electrical resistivity decreases due to stress relieving, the dissolution of the metastable phase, and precipitation coarsening. The resistivity of the solutionized alloys decreases more due to the higher concentration of elements in the solid solution. A microstructural study of the alloys reveals that the solution treatment improves the distribution of the silicon grains. It is also observed that the alloys attained an almost fully re-crystallized state after aging at 350°C for 90 minutes.
Źródło:
Journal of Casting & Materials Engineering; 2018, 2, 2; 30-37
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Modifications on Fatigue Strength of AlSi17Cu5Mg(Fe) Alloy Used for Pistons for Internal Combustion Engines
Autorzy:
Piątkowski, J.
Wieszała, R.
Powiązania:
https://bibliotekanauki.pl/articles/352387.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fatigue strength
Al-Si alloys
FEM analysis
Wöhler diagram
Opis:
Technological progress in construction of automotive vehicles, particularly in construction of engines, enforces simultaneous changes in foundry properties of aluminum alloys used in automotive industry. Until recently, abrasion resistance was the main usability criterion of a material used for pistons for internal combustion engines. At present however, because of the complexity of the process of the fuel mixture combustion, more restrictive standards of limited hydrocarbon emission, and the pursuit of reduction of the vehicle’s mass, fatigue strength of silumins enjoys a continuously increasing interest. The paper presents results of a computer simulation using the finite element method (FEM) and a real fatigue test of AlSi17Cu5Mg(0.5Fe) (A390.0) alloy with unilateral variable bending. The tests aimed to simulate a deflection of a combustion engine piston in a cylinder barrel were carried out in two variants: for a non-modified alloy and an alloy modified with CuP10 master alloy. Based on the distribution of stresses according to the Huber-Mises-Hencky theory (for a given range of the deflection from 0.1 to 0.3 mm), Wöhler curve was determined for the studied alloy. Based on on microstructural investigations, cracks of primary Si crystals were found, caused by fatigue changes resulting from unilateral pulsating vibrations.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 135-141
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hypoeutectic Al-Si Alloy Doped with Chromium, Tungsten and Molybdenum Designated for Pressure Die Casting
Autorzy:
Szymczak, T.
Gumienny, G.
Kurowska, B.
Pacyniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/353170.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multicomponent Al-Si alloys
pressure die casting
DTA method
Opis:
Structural modification of hypoeutectic Al-Si alloy EN-AC 46000 alloy influences its microstructure and mechanical properties. In a series of examinations the EN-AC 46000 alloy has been doped with Cr, W and Mo. The study involved the differential thermal analysis (DTA) and the light microscopy structural analysis of the samples cut from pressure die castings and from samples cast into the DTA cup. The DTA and microstructure analyses revealed new phases in the alloy doped with mentioned additives. The strength properties measurements of the alloys doped with Cr, W and Mo showed significant improvement in tensile strength and elongation, while preserving good hardness.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1629-1635
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Mechanical Properties and Precipitation Reactions in Low Copper Containing Al-Mg-Si Alloy
Autorzy:
Belghit, H.
Farh, H.
Ziar, T.
Zidani, M.
Guemini, M.
Powiązania:
https://bibliotekanauki.pl/articles/354817.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Mg-Si alloys
precipitation
DSC
TEM
excess Si
copper
Opis:
The scope of this work is to investigate the precipitation of two Al-Mg-Si alloys with and without Cu and excess Si by using the differential scanning calorimetry (DSC), transmission electron microscopic (TEM), Vickers hardness measurement and X-ray diffraction. The analysis of the DSC curves found that the excess Si accelerate the precipitation and the alloy contain the excess Si and small addition of copper has higher aging-hardness than that of free alloy (without excess Si and Cu) at the same heat treatment condition. The sufficient holding time for the precipitation of the β'' phase was estimated to be 6 hours for the alloy aged at 100°C and 10 hours for the alloy aged at 180°C. The low Copper containing Al-Mg-Si alloy gives rise to the forming a finer distribution of β (Mg2Si) precipitates which increases the hardness of the alloy. In order to know more about the precipitation reactions, concern the peaks on the DSC curve transmission electron microscopy observation were made on samples annealed at temperatures (250°C, 290°C and 400°C) just above the corresponding peaks of the three phases β'', β' and β respectively.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1643-1648
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tool wear characteristics in machining of hypereutectic Al-Si alloys by cemented carbide tool
Autorzy:
Kobaru, Yuya
Nagaoka, Ryo
Shimana, Kenji
Yoshimitsu, Shinichi
Kondo, Eiji
Powiązania:
https://bibliotekanauki.pl/articles/99533.pdf
Data publikacji:
2020
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
Al-Si alloys
end mill
tool wear
cemented carbide tool
Opis:
During of hypereutectic Al-Si alloys, tool wear increases owing to the presence of silicon particles. Therefore, polycrystalline diamond tools are typically used, but they are very expensive. The purpose of this study is to examine the tool wear characteristics during the end milling of hypereutectic Al-Si alloy (A390–T6) by using comparatively inexpensive diamond-like carbon coated cemented carbide tools. Al-Si alloy was end-milled by changing the cutting speed. Our results revealed that the width of flank wear land increased monotonously with increasing of the cutting force regardless of the cutting speed. In addition, the experimental equation of the width of flank wear land was derived as a function of cutting speed and time, and it was clarified that width of flank wear land could be approximated.
Źródło:
Journal of Machine Engineering; 2020, 20, 2; 94-103
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties the Al-7%SiMg alloy with CuAl10Fe3Mn2 used in machine building and civil engineering
Autorzy:
Lipiński, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/104168.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
Al-Si alloys
aluminum bronze
mechanical properties
stopy Al-Si
brąz aluminiowy
właściwości mechaniczne
Opis:
Silumins are one of the most popular group among aluminum casting alloys. They are characterized by good mechanical and casting properties, low density, good electric and thermal conductivity, a low degree of contraction, good corrosion resistance and a relatively low melting temperature. The mechanical properties of hypoeutectic silumins can be improved through chemical modification as well as traditional or technological processing. Modification improves the mechanical properties of alloys through grain refinement. The effect of treatment has been given a lot of information first of all about microstructure and mechanical properties. This study presents the results of treatment of an Al-7%SiMg alloy with composition CuAl10Fe3Mn2 (as a powder) + (Al-7%SiMg + CuAl10Fe3Mn2) (as a powder) + (Al-7%SiMg + CuAl10Fe3Mn2) (in the form of a rod) in three different ranges. The experiments were conducted following a factor design 23 for 3 independent variables. The main addition was aluminum bronze, as well as clear or melted with raw alloy. The influence of the analyzed modifiers on the microstructure and mechanical properties of the processed alloy was presented in graphs. The modification of a hypoeutectic Al-7%SiMg alloy improved the alloy's properties. The results of the tests indicate that the mechanical properties of the modified alloy are determined by the components introduced to the alloy.
Źródło:
Quality Production Improvement - QPI; 2020, 2, 1; 247-258
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of Si on machined surfaces of Al-based automotive alloys under varying machining parameters
Autorzy:
Razin, Ahmed Asif
Ahammed, Dewan Salsabil
Nur, Maglub Al
Kaiser, Mohammad Salim
Powiązania:
https://bibliotekanauki.pl/articles/2106430.pdf
Data publikacji:
2022
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
Al-Si alloys
roughness
temperature
chips
microstructure
stopy Al-Si
chropowatość
temperatura
wióry
mikrostruktura
Opis:
A morphological change due to Si contend into Al-based automotive alloys has been conducted on the characterization of machined surfaces in terms of roughness, temperature, chips formation as well as microstructure evaluation under different machining conditions. For this experiment, a shaper machine with HSS single point V-shaped cutting tool is used at different cutting speeds and depths of cut. The experimental results show that the surface roughness of the alloys decreases with the cutting speed and depth of cut but it is more prominent in the case of the cutting speed. This is because of a high cutting speed, which is more associated with the higher temperature and softening the work material leading to better surface finish. Higher Si added alloys also exhibit a better surface finish because the sample content is different fine and hard intermetallic due to ageing treatment, which also makes the alloys more brittle. For brittle and higher hardness, it produces a higher temperature during machining. During machining, relatively curly and short chips are formed by the high Si added alloy because of its low elongation properties. The fracture surfaces of higher Si added alloy display more crack propagation obtained by plate-like Si rich intermetallic.
Źródło:
Journal of Mechanical and Energy Engineering; 2022, 6, 1; 43--52
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of aluminum alloys for combustion engine bearings
Autorzy:
Krzymień, A.
Krzymień, P.
Powiązania:
https://bibliotekanauki.pl/articles/244331.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
slide bearing
aluminium alloys
properties
new Al-Sn-Si alloys
Opis:
In most cases the choice of proper alloy for combustion engine crank mechanism bearings means a compromise between various requirements. In order to increase the fatigue strength and to enhance the wear resistance the research on new materials, including the aluminium alloys, is being carried out. This paper deals with properties of aluminium bearing materials, requirements relative to their operation as well as tendencies of their future development as the bearing alloys for heavy duty diesels. Interdependences affecting bearing properties, comparison of tested bearing materials fatigue strength, controlled distribution of Si particle size in analysed bearing alloys, comparison of fatigue strength of bearing materials subjected to tests, the wear of analysed bearing alloys after engine tests are illustrated in the paper. The paper concentrates on the problems of properties of aluminium based bearing alloys, tendencies in development of aluminium alloys for highly loaded crank bearings of IC engines. Bearing of Al-Sn-Si alloy operates satisfactorily on an engine and have high fatigue strength (particularly on diesels) and posses high wear resistance, especially for a case of frequently started and stopped engine (gasoline engine) which causes difficulties in formation of continuous oil film at low crankshaft speeds.
Źródło:
Journal of KONES; 2007, 14, 4; 233-238
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalizacja zabiegów rozdrobnienia ziarna i modyfikacji eutektyki w pod- i okołoeutektycznych stopach Al-Si
Optimization of grain refinement and modification of the eutectic in hypo- and transeutectic Al-Si alloys
Autorzy:
Saja, K.
Powiązania:
https://bibliotekanauki.pl/articles/391801.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
stopy Al-Si
rozdrobnienie ziarna
modyfikacja eutektyki
właściwości mechaniczne
Al-Si alloys
grain refinement
eutectic modification
mechanical properties
Opis:
Zabiegi rozdrobnienia ziarna i modyfikacji eutektyki krzemowej w siluminach pod- i okołoeutektycznych należą do ważnych czynników kształtujących ich mikrostrukturę oraz właściwości fizyko-mechaniczne i technologiczne. Z uwagi na ten fakt w publikacji zostały podjęte zadania odpowiedniego, optymalnego doboru dodatków rozdrabniających αAl − roztwór stały oraz modyfikujących eutektykę krzemową (αAl + βSi), w zależności od stopnia eutektyczności układu Al-Si. Wytopy realizowane były w Zakładzie Stopów Metali Nieżelaznych Instytutu Odlewnictwa w Krakowie zgodnie z planem doświadczeń. Otrzymane wyniki badania właściwości mechanicznych (Rm, Rp0,2, A5, Z i HB) poddane zostały obróbce statystycznej. Wyniki te, na podstawie opracowanej interpretacji graficznej, pozwalają w łatwy sposób na właściwy dobór ilości rozdrabniacza (Ti5B1) i modyfikatora krzemu eutektycznego (AlSr10), w zależności od zawartości krzemu (w % wag.) w układzie Al-Si.
The procedures of grain refinement and modification of a silicon eutectic in hypo- and transeutectic silumins belong to important factors shaping their microstructure as well as physico-mechanical and technological properties. Due to this fact, the study attempts to address a proper, optimal, selection of refining additions αAl − a solid solution as well as additions modifying the silicon eutectic (αAl + βSi), depending on the eutecticity degree of the Al-Si system. The melts were realized at the Department of Non-Ferrous Metal Alloys of the Foundry Research Institute in Kraków. according to the experiment schedule. The obtained results of the examinations of the mechanical properties (Rm, Rp0.2, A5, Z and HB) underwent statistical treatment. The results, based on elaborate graphic interpretation, enable an easy selection of the amount of refiner (Ti5B1) and modifier of the eutectic silicon (AlSr10), depending on the silicon content (at wt. %) in the Al-Si system.
Źródło:
Prace Instytutu Odlewnictwa; 2016, 56, 4; 351-361
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the Chemical Composition on Electrical Conductivity and Mechanical Properties of the Hypoeutectic Al-Si-Mg Alloys
Autorzy:
Dybowski, B.
Szymszal, J.
Poloczek, Ł.
Kiełbus, A.
Powiązania:
https://bibliotekanauki.pl/articles/355890.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hypoeutectic Al-Si-Mg alloys
sand casting
conductivity
mechanical properties
chemical composition
Opis:
Due to low density and good mechanical properties, aluminium alloys are widely applied in transportation industry. Moreover, they are characterized by the specific physical properties, such as high electrical conductivity. This led to application of the hypoeutectic Al-Si-Mg alloys in the power generation industry. Proper selection of the alloys chemical composition is an important stage in achievement of the demanded properties. The following paper presents results of the research on the influence of alloys chemical composition on their properties. It has been revealed that Si and Ti addition decreases electrical conductivity of the Al-Si-Mg alloys, while Na addition increases it. The mechanical properties of the investigated alloys are decreased by both silicon and iron presence. Sodium addition increases ductility of the Al-Si-Mg alloys.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 353-360
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solute-Vacancy Clustering In Al-Mg-Si Alloys Studied By Muon Spin Relaxation Technique
Grupowanie wakancji substancji rozpuszczonej w stopach Al-Mg-Si analizowanych metodą relaksacji spinowej mionów
Autorzy:
Nishimura, K.
Matsuda, K.
Komaki, R.
Nunomra, N.
Wenner, S.
Holmestad, R.
Matsuzaki, T.
Watanabe, I.
Pratt, F. L.
Powiązania:
https://bibliotekanauki.pl/articles/352369.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Mg-Si alloys
muon spin relaxation
vacancy
stopy Al-Mg-Si
relaksacja spinowa mionów
wakancja
Opis:
Zero-field muon spin relaxation experiments were carried out with Al-1.6%Mg2Si, Al-0.5%Mg, and Al-0.5%Si alloys. Observed relaxation spectra were compared with the calculated relaxation functions based on the Monte Carlo simulation to extract the dipolar width (Δ), trapping (νt), and detrapping rates (νd), with the initially trapped muon fraction (P0). The fitting analysis has elucidated that the muon trapping rates depended on the heat treatment and solute concentrations. The dissolved Mg in Al dominated the νt at lower temperatures below 120 K, therefore the similar temperature variations of νt were observed with the samples mixed with Mg. The νt around 200 K remarkably reflected the heat treatment effect on the samples, and the largest νt value was found with the sample annealed at 100°C among Al-1.6%Mg2Si alloys. The as-quenched Al-0.5%Si sample showed significant νt values between 80 and 280 K relating with Si-vacancy clusters, but such clusters disappeared with the natural aged Al-0.5%Si sample.
Stopy Al-1,6%Mg2Si, Al-0,5%Mg i Al-0,5%S poddano badaniu relaksacji spinowej mionów w zerowym polu magnetycznym. Obserwowane widma relaksacyjne porównano z funkcjami relaksacji obliczonymi przy wykorzystaniu symulacji Monte Carlo w celu otrzymania informacji o szerokości dipolarnej Δ (ang. dipolar width) oraz szybkości uwięzienia νt (ang. trapping) i uwolnienia νd (ang. detrapping) z pierwotnie związaną frakcją mionów (P0). Z przeprowadzonej analizy wynika, że szybkość uwięzienia mionów zależy od zastosowanej uprzednio obróbki cieplnej oraz stężenia pierwiastków domieszki. W przypadku Mg rozpuszczonego w osnowie Al dominowała szybkość νt w temperaturach poniżej 120 K, dlatego też w próbkach domieszkowanych Mg obserwowano podobne odchylenia temperaturowe szybkości νt. Szybkość νt w temperaturze około 200 K doskonale ukazuje wpływ zastosowanej obróbki cieplnej na omawiane próbki, z których najwyższą wartość νt wykazały te wyżarzane w 100°C spośród stopów Al-1,6%Mg2Si. Próbka Al-0,5%Si wykazała znaczące wartości νt pomiędzy temperaturami 80 a 280 K wskazujące na aglomeracje wakancji Si, które jednak zanikają po naturalnym starzeniu stopu Al-0.5%Si.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2A; 925-929
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Iron Phases Crystallization on the Durability of the Bimetallic Connection Between Ring Inserts and the Piston Casting
Autorzy:
Szucki, Michał
Piątkowski, Jarosław
Czerepak, M.
Powiązania:
https://bibliotekanauki.pl/articles/27314162.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
crystallization
Al-Si alloys
iron phases
pistons
automotive industry
krystalizacja
stopy Al-Si
fazy krystalizacji
tłoki
przemysł motoryzacyjny
Opis:
The article presents the most important causes of the unstable connection between cast iron ring inserts and the silumin casting of an engine piston. It is shown that manufacturing defects are mainly related to the alfin processing of inserts in Al-Si alloy (the so-called AS9 alloy). Exceeding the permissible iron content in AS9 alloy causes the crystallization of brittle -Al5FeSi phases. Their unfavorable morphology and large size are the main reasons for the weakening of the diffusion connection between the inserts and the piston, causing an unacceptable proportion of defective products. The study presented in this work was conducted under industrial conditions on a population of 10.000 pistons. Quality control data, production parameters, as well as the micro- and macro-structures of the cast iron inserts, and the interface area between the inserts and the silumin piston, were analyzed. Material and technological solutions have been proposed to reduce the occurrence of casting defects at the insert-piston joint. This includes the introduction of so-called "morphological correctors" of the -Al5FeSi phases, reducing the possibility of gaseous impurities in the AS9 alloy and optimizing the temperature of the alfin alloy.
Źródło:
Archives of Foundry Engineering; 2023, 23, 2; 112--118
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advantages of colour etching in quality control of recycled Al-Si cast alloys
Autorzy:
Tillová, Eva
Kuchariková, Lenka
Chalupová, Mária
Belan, Juraj
Vaško, Alan
Herčko, Adrián
Powiązania:
https://bibliotekanauki.pl/articles/104005.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
Al-Si cast alloys
colour metallography
microstructure
quality control
stopy odlewane Al-Si
mikrostruktura
kontrola jakości
metalografia kolorowa
Opis:
Colour Metallography is a set of light metallographic microscopy methodologies that utilize phase colour contrast as a source of new structure information compared to conventional techniques. In many cases, colour contrast can be induced where no identifiable phase contrast is obtained by conventional techniques. With the help of colour contrast, we gain new information on the structure of Al-Si alloys, especially intermetallic phases, in which the benefits of its use in casting quality control are of benefit. Blue-yellow contrast is definitely more pronounced than dark grey or light grey contrast. There is no substantial reproducible colour reproduction, since it is irrelevant whether the two phases are distinguished by blue-yellow or green-ocher contrast. When using the colour contrast, the structural components differ not only according to their microscopic appearance, but also based on the knowledge of the chemical composition of alloys, interactions between structural components, knowledge of the possible influence of Al-alloys structure (e.g. refining, modifications, heat treatment). Colour contrast in quality control of Al-Si alloys was applied to AlSiMg cast alloy (AlSi7Mg0.3; AlSi7MgTi; AlSi10MgMn; etc.).
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 296-303
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of the Proportion of Charge from Waste Materials on the Quality of High Pressure Castings
Autorzy:
Schlafka, P.
Bydałek, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/380867.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
die casting
Al-Si alloys
circulation scrap
environment protection
castings defects
odlewanie
stopy Al-Si
złom
ochrona środowiska
wady odlewów
Opis:
Nowadays, the most popular production method for manufacturing high quality casts of aluminium alloys is the hot and cold chamber die casting. Die casts made of hypereutectoid silumin Silafont 36 AlSi9Mg are used for construction elements in the automotive industry. The influence of the metal input and circulating scrap proportion on porosity and mechanical properties of the cast has been examined and the results have been shown in this article. A little porosity in samples has not influenced the details strength and the addition of the circulating scrap has contributed to the growth of the maximum tensile force. Introducing 80% of the circulating scrap has caused great porosity which led to reduce the strength of the detail. The proportion of 40% of the metal input and 60% of the circulating scrap is a configuration safe for the details quality in terms of porosity and mechanical strength.
Źródło:
Archives of Foundry Engineering; 2019, 2; 21-24
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Double Modification Of AlSi9Mg Alloy With Boron, Titanium And Strontium
Podwójna modyfikacja stopu AlSi9Mg za pomocą tytanu, boru i strontu
Autorzy:
Lipiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/355452.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Si alloys
silumin
mechanical properties
modification
boron
titanium
strontium
stopy Al-Si
alpaks
właściwości mechaniczne
modyfikacja
bor
tytan
stront
Opis:
The microstructure of an unmodified AlSi9Mg alloy comprises large primary α phase dendrites, eutectic β phase crystals and eutectic α phase. This composition is responsible for the alloy’s low strength parameters, and it limits the extent of practical applications. The mechanical properties of hypoeutectic silumins can be improved through chemical modification as well as traditional or technological processing. Modification improves the mechanical properties of alloys through grain refinement. This study presents the results of double modification of an AlSi9Mg alloy with strontium, boron and titanium. The influence of the analyzed modifiers on the microstructure and mechanical properties of the processed alloy was presented in graphs. The modification of a hypoeutectic AlSi9Mg alloy improved the alloy’s properties. The results of the tests indicate that the mechanical properties of the modified alloy are determined by the sequence in which the components are introduced to the alloy.
Mikrostruktura niemodyfikowanego stopu AlSi9Mg składa się z dużych dendrytów pierwotnej fazy α, eutektycznych kryształów fazy β i eutektycznej fazy α. Taki skład fazowy jest przyczyną niskiej wytrzymałości stopu, co ogranicza jego praktyczne zastosowanie w praktyce. Właściwości mechaniczne podeutektycznych siluminów można poprawić poddając stop modyfikacji chemicznej, jak również poprzez zastosowanie procesów technologicznych. Modyfikacja poprawia właściwości mechaniczne stopów poprzez rozdrabnianie ziarna. W pracy przedstawiono wyniki podwójnej modyfikacji stopu AlSi9Mg przy użyciu strontu, boru i tytanu. Wpływ badanych modyfikatorów na mikrostrukturę i właściwości mechaniczne obrabianego stopu przedstawiono na wykresach. Modyfikacja podeutektycznego stopu AlSi9Mg poprawiła jego właściwości. Wyniki badań wskazują, że właściwości mechaniczne modyfikowanego stopu zależą od kolejności, w jakiej składniki są wprowadzane do stopu.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3; 2415-2419
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ czynników technologicznych na jakość odlewów ze stopów aluminium
Influence of technological factors on the quality of aluminum alloys castings
Autorzy:
Poloczek, Ł.
Kiełbus, A.
Powiązania:
https://bibliotekanauki.pl/articles/339864.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Zarządzania Produkcją
Tematy:
zapewnienie jakości odlewom
odlewnicze stopy aluminium Al-Si
wady odlewów
high quality casting
Al-Si foundry alloys
casting defects
Opis:
To produce die-cast with high quality while maintaining the required performance affects many stages of the production process. These steps are dependent on each other and in the end of production process they decide on the competitiveness of manufactured elements. The main aspect affecting on the high quality and thus on the competitiveness of castings is finding that casting is free from defects. The great diversity of the disadvantages of the castings results from the technology of production casting, which is affected by a series of many technological operations, including: design and construction of the mold, technology of melting and casting molten metal into the mold and carrying out machining after casting.
Źródło:
Zarządzanie Przedsiębiorstwem; 2016, 19, 2; 14-19
1643-4773
Pojawia się w:
Zarządzanie Przedsiębiorstwem
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka tribologiczna kompozytu A390/Gr
The tribological characteristic of A390/Gr composite
Autorzy:
Walczak, M.
Bieniaś, J.
Pasierbiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/311549.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
test ball-on-disc
aluminiowe materiały kompozytowe
zużycie
stopy Al-Si
ball-on-disc test
aluminium matrix composites
wear
Al-Si alloys
Opis:
Artykuł przedstawia wyniki badań tribologicznych kompozytu A390/Gr (zawierającego cząsteczki grafitu w ilości 5,7% wag.) i jego osnowy AlSi20CuNi. Kompozyt ten znajduje zastosowanie, jako nowoczesny materiał konstrukcyjny w przemyśle motoryzacyjnym, szczególnie na tłoki, tuleje cylindrowe i łożyska ślizgowe. Pomiary współczynnika tarcia wykonano na tribotesterze typu „ball-on-disc” z przeciwpróbkami (ball) w postaci kulek wykonanych ze stali 100Cr6. Badano współczynnik zużycia i współczynnik tarcia próbki, a ślady zużycia poddano obserwacjom SEM. Ocenę istotności zmian współczynnika zużycia przeprowadzono testem U Manna-Whitneya. Odporność na zużycie stopu osnowy i kompozytu zostały poddane analizie porównawczej. Wykazano, że kompozyt zbrojony grafitem charakteryzuje się mniejszym współczynnikiem tarcia i mniejszym zużyciem w porównaniu do osnowy.
The paper presents the results of tribological research on A390/Gr composite (containing graphite particles in the amount of 5.7% wt.%) and on AlSi20CuNi its matrix. This composite is used in automotive industry, particularly for pistons, cylinder liners and slide bearings. Friction coefficient measurements were performed on „ball-on-disc” tribotester with counter-specimen (ball) made of steel 100Cr6. Were tested wear rate and coefficient of friction of the sample, the tracks of wear was SEM observation. The evaluation of the significance of changes in wear factor was conducted by Manna-Whitney U test. It was demonstrated that the composite reinforced with graphite is characterized by lower friction coefficient and lower wear in comparison to the matrix.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 11; 149-151
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology of intermetallic phases in Al-Si cast alloys and their fracture behaviour
Autorzy:
Hurtalova, L.
Tillova, E.
Chalupova, M.
Belan, J.
Powiązania:
https://bibliotekanauki.pl/articles/111862.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
morphology of intermetallic phases
Al-Si alloys
fracture behaviour of intermetallic phases
morfologia faz międzymetalicznych
stopy Al-Si
zachowanie pęknięć faz międzymetalicznych
Opis:
Applications of Al-Si cast alloys in recent years have increased especially in the automotive industry (dynamic exposed cast, engine parts, cylinder heads, pistons and so on). Controlling the microstructure of secondary aluminium cast alloys is very important, because these alloys contain more additional elements that form various intermetallic phases in the structure. Therefore, the contribution is dealing with the valuation type of intermetallic phases and their identification with using optical and scanning microscopy. Some of the intermetallic phases could be identified on the basis of morphology but some of them must be identified according EDX analysis. The properties of aluminium alloy are affected by morphology of intermetallic phases and therefore it is necessary to study morphology and its fracture behaviour. The present work shows morphology and typical fracture behaviour as the most common intermetallic phases forming in Al-Si alloys.
Źródło:
Production Engineering Archives; 2015, 6, 1; 2-5
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the Properties of the AlSi9Cu3 Alloy Depending on the Ratio of Returnable Material in the Batch
Autorzy:
Matejka, M.
Bolibruchová, D.
Chalupová, M.
Powiązania:
https://bibliotekanauki.pl/articles/2049423.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Si-Cu cast alloys
natural and artificial ageing
metallography
mechanical properties
hot tearing
Opis:
Recycling of aluminium returnable material through its reuse is now an essential component of the production of aluminium alloy castings. The main goal is to find a suitable ratio of the primary alloy and the returnable material in the batch, thus determining the right compromise between the price and the quality of the casting. Experimental alloys were evaluated by thermal analysis, combination of structural analytical techniques and selected mechanical properties. The alloys were also subjected to tearing susceptibility testing. The increase in the returnable material amount resulted in changes in the alloy properties at the first increase in volume to 20%. After exceeding the balanced ratio (50:50), there was considerable degradation of the microstructure, failure to achieve the minimum values of some mechanical properties required by the standard, and the alloy showed increased susceptibility to tearing.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 15-23
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 34

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