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Wyszukujesz frazę "hypereutectic Al-Si alloy" wg kryterium: Temat

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    Wyświetlanie 1-10 z 10
    Tytuł:
    The Effect of Water Mist Cooling of Casting Die on the Solidification, Microstructure and Properties of AlSi20 Alloy
    Autorzy:
    Władysiak, R.
    Kozuń, A.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/353825.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silicon dendrites
    casting die cooling
    water mist
    hypereutectic Al-Si alloy
    Opis:
    Unmodified AlSi20 alloy were casted at the research station, allowing for sequential multipoint cooling using a dedicated computer- controlled program. This method allows for the formation of the microstructure of hypereutectic AlSi20 alloy and also increases hardness. Primary silicon dendrites were found in the microstructure of cooled samples. Based on these dendrites, the formation of primary silicon particles is explained. Cooling of casting die with a water mist stream causes changes in solidification, which leads to expansion of the boundary layer with columnar crystals and shrinkage of the core zone with equiaxed crystals. It also causes more regular hardness distribution around pre-eutectic Si crystals, which can lead to tensile strength and machinability improvement.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 187-194
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of AlSi21CuNi alloy’s quality with use of ATND method
    Autorzy:
    Pezda, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380515.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hypereutectic Al-Si alloy
    modification
    ATND
    mechanical properties
    stop nadeutektyczny Al-Si
    modyfikacja
    metoda ATND
    właściwości mechaniczne
    Opis:
    Majority of combustion engines is produced (poured) from Al-Si alloys with low thermal expansion coefficient, so called piston silumins. Hypereutectic alloys normally contain coarse, primary angular Si particles together with eutectic Si phase. The structure and mechanical properties of these alloys are highly dependent upon cooling rate, composition, modification and heat-treatment operations. In the paper one depicts use of the ATND method (thermal-voltage-derivative analysis) and regression analysis to assessment of quality of the AlSi21CuNi alloy modified with Cu-P on stage of its preparation, in aspect of obtained mechanical properties (R0,02, Rm, A5, HB). Obtained dependencies enable prediction of mechanical properties of the investigated alloy in laboratory conditions, using values of characteristic points from curves of the ATND method.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 87-92
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystallization of AlSi17Cu5Mg Alloy after Time-thermal Treatment
    Autorzy:
    Piątkowski, J.
    Kamiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382327.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hypereutectic Al-Si alloy
    overheating
    thermal analysis
    crystallization process
    stop nadeutektyczny Al-Si
    przegrzanie
    analiza termiczna
    proces krystalizacji
    Opis:
    In the dissertation it has been shown, that so called “time-thermal treatment” (TTT) of the alloy in liquid state as overheating the metal with around 250°C above Tliq. and detailing it in temperature for 30 to 40 minutes has the influence on changing the crystallization parameters (Tliq., TEmin., TEmax., TE(Me), TSol.). It was ascertained, that overheating the AlSi17Cu5Mg alloy substantially above Tliq. results with microcrystalline structure. Evenly distributed in the eutectic warp primeval silicon crystals and supersaturated with alloying additives of base content (Cu, Mg, Fe) of α(Al) solution, ensures not only increase durability in ambient temperature, but also at elevated temperature (250°C), what due to it’s use in car industry is an advantage.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1; 83-86
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fatigue Resistance of A390.0 Alloy Modified with Phosphorus
    Autorzy:
    Wieszała, R.
    Piątkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381178.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fatigue wear
    unilateral pulsating vibration
    hypereutectic Al-Si alloy
    zużycie zmęczeniowe
    drganie pulsacyjne
    stop nadeutektyczny Al-Si
    Opis:
    The paper presents fatigue tests (unilateral pulsating vibrations) for hypereutectic silumin AlSi17Cu5Mg aimed at simulation of deflection of the piston head in a combustion engine. The methodology of the tests and the way of marking the deflection of the tested material is described together with the detailed description of the test stand. The fatigue resistance ZG was identified in the tested material and a Wöhler diagram was prepared to show the areas of limited and unlimited fatigue resistance.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3 spec.; 99-102
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of FEM Analysis for Evaluation of the Stress and Deformation Distributions in the Top Layer of A390.0 Alloy During Friction
    Autorzy:
    Wieszała, R.
    Piątkowski, J.
    Bąkowski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/381624.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hypereutectic Al-Si alloy
    surface layer
    finite elements method
    FEM
    stop Al-Si
    warstwa powierzchniowa
    metoda elementów skończonych
    MES
    Opis:
    The paper presents an analysis of the effect of shape of primary silicon crystals on the sizes of stresses and deformations in a surface layer of A390.0 alloy by Finite Elements Method (FEM). Analysis of stereological characteristics of the studied alloy, performed based on a quantitative metallographic analysis in combination with a statistical analysis, was used for this purpose. The presented simulation tests showed not only the deposition depth of maximum stresses and strains, but also allowed for determining the aforementioned values depending on the shape of the silicon crystals. The studied material is intended for pistons of internal combustion engines, therefore the analysis of the surface layer corresponded to conditions during friction in a piston-cylinder system of an internal combustion engine having power of up to 100 kW. The obtained results showed important differences in the values of stresses and strains up to 15% between various shape of the silicon crystals. Crystals with sharp edges caused higher stresses and deformation locally than those with rounded shapes.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 1; 228-234
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Mechanical Properties of AlSiCuMg Alloy after Thermo Processing
    Autorzy:
    Piątkowski, J.
    Kamiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/379577.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hypereutectic Al-Si alloy
    overheating
    CuP10 master alloy
    mechanical properties
    microstructure
    stop nadeutektyczny Al-Si
    przegrzanie
    stop CuP10
    właściwości mechaniczne
    Opis:
    In the dissertation it has been shown, that so called „time-thermal treatment” (TTT) of the alloy in liquid state, as overheating the metal with around 250°C above the Tliq. and detaining it in this temperature for around 30 minutes, improves the mechanical properties (HB, Rm, R0,2). It was ascertained, that overheating the AlSi17Cu5Mg alloy aids the modification, resulting with microcrystalline structure. Uniform arrangement of the Si primeval crystals in the warp, and α(Al) solution type, supersaturated with alloying elements present in the base content (Cu, Mg) assures not only increased durability in the ambient temperature, but also at elevated temperature (250°C), what is an advantage, especially due to the use in car industry.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1; 79-82
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Chosen Abrasive Wear Parameters on Fault-free Operation Time of the Cylinder-Piston System
    Autorzy:
    Piątkowski, J.
    Mesjasz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382390.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    reliability
    Weibull analysis
    hypereutectic Al-Si alloy
    regress analysis
    correlation analysis
    niezawodność
    analiza Weibulla
    stop nadeutektyczny Al-Si
    analiza regresji
    analiza korelacji
    Opis:
    In the paper the method of data modeling for damages, that has values higher than zero, is being shown. With the use of Weibull distribution, with prior regression and correlation analysis, the chosen parameters, that define durability and break down level of two populations of AlSi17Cu5Mg, were set. The calculation sheet that is shown for reliability allows the creation of so called survival chart, and on the basis of durability data the average warrantee time can be defined at the pre-exploitation stage.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3 spec.; 69-72
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The mechanical properties of AlSi17Cu5 cast alloy after overheating and modification of CuP master alloy
    Autorzy:
    Piątkowski, J.
    Jabłońska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380532.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hypereutectic Al-Si alloy
    overheating
    modification
    CuP10 master alloy
    mechanical properties
    plastic properties
    stop nadeutektyczny Al-Si
    przegrzanie
    modyfikacja
    zaprawa CuP10
    właściwości mechaniczne
    właściwości plastyczne
    Opis:
    The paper presents the results of studies on the effect of the AlSi17Cu5 alloy overheating to a temperature of 920°C and modification with phosphorus (CuP10) on the resulting mechanical (HB, Rm, R0.2) and plastic (A5 and Z) properties. It has been shown that, so-called, "time-thermal treatment" (TTT) of an alloy in the liquid state, consisting in overheating the metal to about 250°C above Tliq., holding at this temperature by 30 minutes improves the mechanical properties. It has also been found that overheating of alloy above Tliq. enhances the process of modification, resulting in the formation of fine-grain structure. The primary silicon crystals uniformly distributed in the eutectic and characteristics of the \alfa(Al) solution supersaturated with alloying elements present in the starting alloy composition (Cu, Fe) provide not only an increase of strength at ambient temperature but also at elevated temperature (250°C).
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3; 68-71
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Data Simulation with the Use of Weibull Analysis for Evaluation of Reliability of Chosen Assortment
    Autorzy:
    Piątkowski, J.
    Mesjasz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381866.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    reliability
    Weibull analysis
    hypereutectic Al-Si cast alloy
    regression analysis
    correlation analysis
    niezawodność
    analiza Weibulla
    stop nadeutektyczny Al-Si
    analiza regresji
    analiza korelacyjna
    Opis:
    In the dissertation the data modeling has been shown for the data that regards the damages, which value is above zero. With the use of Weibull distribution, with prior regression and correlation analysis chosen parameters that defines the life time and failure level of two populations of AlSi17Cu5 were defined. The calculation sheet of reliability allows to create so called survival diagram, and on the basis of durability data the average warrantee can be determined, on the pre-exploitation period.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 47-50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tribological Properties of AlSi17Cu5Mg Alloy Modified with CuP Master Alloy with Various Speeds of Friction
    Autorzy:
    Piątkowski, J.
    Wieszała, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/380741.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    friction coefficient
    power of frictions
    tribology
    hypereutectic alloy Al-Si
    współczynnik tarcia
    siła tarcia
    tribologia
    stop Al-Si
    Opis:
    The paper presents the influence of modification with phosphorus (CuP10) on the tribological properties of the alloy AlSi17Cu5Mg coupled abrasively with cast-iron EN GJL-350. Tests of coefficient of friction and wear of mass were conducted on tribological tester T-01. An important aspect in the assessment of the tribological properties is the analysis of initial material microstructure in reference to silumin which underwent modification with phosphorus. It was found that the difference in structure of tested materials, mainly sizes of primary silicon crystals significantly influences the tribological properties whereas the speed change of the friction knot does not have such big influence.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 1; 45-48
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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