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    Wyświetlanie 1-31 z 31
    Tytuł:
    Influence of Casting Wall Thickness on Crystallisation Under Pressure
    Autorzy:
    Pastirčák, R.
    Ščury, J.
    Brůna, M.
    Bolibruchová, D.
    Jakubski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/353947.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    squeeze casting
    AlSi7Mg0.3 alloy
    AlSi12 alloy
    pressure
    wall thickness
    Opis:
    The paper deals with squeeze casting technology. For this research a direct squeeze casting method has been chosen. The influence of process parameters variation (casting temperature, mold temperature, pressure) on mechanical properties and structure will be observed. The thicknesses of the individual walls were selected based on the use of preferred numbers and series of preferred numbers (STN ISO 17) with the sequence of 3.15, 4.00, 5.00, 6.00 and 8.00 mm. The width of each wall was 22 mm with a length of 100 mm. As an experimental material was chosen the AlSi12 and AlSi7Mg0.3 alloys. The mechanical properties (UTS, E) for individual casting parameters and their individual areas of different thicknesses were evaluated. In the structure the influence of pressure on the change of the eutectic morphology, the change of the volume of eutectic and the primary alpha phase, the effect of the pressure on the more fine-grain and the regularization of the structure were evaluated.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1889-1893
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluating the Attenuation in Ultrasonic Testing of Castings
    Autorzy:
    Boháčik, M.
    Mičian, M.
    Sládek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383170.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi alloy
    cast iron
    technological casting parameters
    ultrasound attenuation
    stop AlSi
    żeliwo
    parametry technologiczne
    tłumienie fal ultradźwiękowych
    Opis:
    This paper considers the assessment of attenuation in aluminium alloys castings and in cast iron prepared by gravity casting method and by casting under pressure. The issue of ultrasound attenuation is important in setting the conditions of non-destructive (NDT) testing, especially in casted materials. The characteristics of the ultrasonic technique and ultrasonic attenuation and the calculation of the attenuation and the velocity of ultrasound are presented in the theoretical part of this paper. For experimental measurements, cylindrical castings from AlSi alloy (a hypoeutectic alloy with a silicon content of about 7% - AlSi7 and a eutectic alloy with a silicon content of about 12% - AlSi12) and from grey and ductile cast iron were made. The ultrasonic records of the casting control, the calculation of ultrasound attenuation for individual samples are listed and described in the experimental part. The evaluation of measurements and comparison of calculated ultrasound attenuation is at the end of this article.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 151-156
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of Zirconium on the Structural and Mechanical Properties of Commercial AlSi10MgCu Alloys
    Autorzy:
    Hajduch, P.
    Djurdjevic, M. B.
    Bolibruchová, D.
    Simicevic, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/356527.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    zirconium
    AlSi10MgCu alloy
    hardness
    solid solution treatment
    Opis:
    The impact of small addition of zirconium in hypoeutectic commercial AlSi10MgCu alloys on their mechanical properties (hardness) in as cast and thermally treated conditions was investigated. Small addition of zirconium does not change significantly the as cast and heat-treated microstructure of investigated alloys except to reduce the SDAS and grain size of primary α-aluminium phases. Addition of zirconium up to 0.14 wt. percentage increases the hardness of investigated alloys in as cast conditions. The increase in the hardness of samples after various solid solution times can correlate very well with the formation of small needle like coherent Al3Zr particles.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 1107-1110
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Statistical analysis using multiple regression of stereological parameters for skeleton castings microstructure
    Autorzy:
    Cholewa, M.
    Dziuba-Kałuża, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382076.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi alloy
    microstructural analysis
    statistical analysis
    skeleton casting
    stop Al-Si
    analiza mikrostrukturalna
    analiza statystyczna
    odlew szkieletowy
    Opis:
    In this article authors showed influence of technological parameters and modification treatment on structural properties for closed skeleton castings. Approach obtained maximal refinement of structure and minimal structure diversification. Skeleton castings were manufactured in accordance with elaborated production technology. Experimental castings were manufactured in variables technological conditions: range of pouring temperature 953÷1013 K , temperature of mould 293÷373 K and height of gating system above casting level 105÷175 mm. Analysis of metallographic specimens and quantitative analysis of silicon crystals and secondary dendrite-arm spacing analysis of solution α were performed. Average values of stereological parameters for all castings were determined. (B/L) and (P/A) factors were determined. On basis results of microstructural analysis authors compares research of samples. The aim of analysis was selected samples on least diversification of refinement degree of structure and least silicon crystals. On basis microstructural analysis authors state that samples 5 (AlSi11, Tpour 1013K, Tmould 333K, h – 265 mm) has the best structural properties (least diversification of refinement degree of structure and the least refinement of silicon crystals). Then statistical analysis results of structural analysis was obtained. On basis statistical analysis autors state that the best structural properties for technological parameters: Tpour = 1013 K, Tmould = 373 K and h = 230 mm [4]. The results of statistical analysis are the prerequisite for optimization studies.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 43-48
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Zirconium on the Solidification Path and Structural Properties of Commercial AlSi10MgCu Alloys
    Autorzy:
    Hajduch, P.
    Djurdjevic, M. B.
    Bolibruchová, D.
    Simicevic, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/351378.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    zirconium
    AlSi10MgCu alloy
    grain size
    SDAS
    porosity
    Opis:
    Comprehensive understanding of the melt quality is of vital importance for foundry man. The effect of each particular element need to be properly analysed. Therefore, the aim of this paper was to analyse the impact of various content of zirconium on the solidification path and structural characteristics (SDAS, grain size, porosity) of as cast commercial AlSi10MgCu alloys. It has been found that addition of zirconium up to 0.24 wt.% reduce significantly the grains size (from 3.5 mm to 1.2 mm), SDAS (from 57.3 μm to 50.4 μm) and porosity (from 19% to 5%), leading to production of sound cast parts.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 2; 549-554
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Iron in AlSi10MgMn Alloy
    Autorzy:
    Žihalová, M.
    Bolibruchová, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382235.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    alloy AlSi10MgMn
    intermetallic phase
    bronze
    stop AlSi10MgMn
    faza międzymetaliczna
    brąz
    Opis:
    Presence of iron in Al-Si cast alloys is common problem mainly in secondary (recycled) aluminium alloys. Better understanding of iron influence in this kind of alloys can lead to reduction of final castings cost. Presented article deals with examination of detrimental iron effect in AlSi10MgMn cast alloy. Microstructural analysis and ultimate tensile strength testing were used to consider influence of iron to microstructure and mechanical properties of selected alloy.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4; 109-112
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Grain-Size Prediction Model in Aluminum Castings Manufactured by Low-Pressure Technology
    Autorzy:
    Fernández-Calvo, A. I.
    Lizarralde, I.
    Sal, E.
    Rodríguez, P.
    de Zabalegui, E. O.
    Cia, I.
    Rios, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/106923.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    grain refinement
    AlSi7Mg alloy
    thermal modulus
    cooling rate
    solidification evolution
    Opis:
    The grain refinement in a real casting manufactured by Low Pressure Die Casting (LPDC) such as wheels and steering knuckles depends on the grain-refinement potential of the metal and the geometry of the part/process parameters. For this study, the effect of the cooling rate on the AlSi7Mg alloy with different metal qualities in terms of grain refinement was tested. The grain size has been metallographically evaluated in cylindrical test pieces and in the real wheels and steering knuckles manufactured at the Mapsa and Fagor Ederlan foundries. The Thermolan®-Al system has been used to evaluate the nucleation potential in terms of grain size on a standard cup. The grain size has been modeled taking into account the effect of the cooling rate measured in the center of the cylindrical test parts and the different grain-size potential. Different grades of refinement have been tested. The grain size measured in a real casting (wheel and steering knuckle) was used to calibrate the model for a real part in LPDC for different grain-size potential.
    Źródło:
    Journal of Casting & Materials Engineering; 2018, 2, 4; 71-77
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Mould Material Coatings on the Microstructure of AlSi7Mg Alloy
    Autorzy:
    Dybowski, B.
    Poloczek, Ł.
    Jarosz, R.
    Kiełbus, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383041.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallography
    AlSi7Mg alloy
    protective coatings
    sand casting
    metalografia
    stop AlSi7Mg
    powłoki ochronne
    odlewy piaskowe
    Opis:
    Family of the aluminium alloys with silicon addition is an important group of non-ferrous casting alloys. They exhibit very good technological properties, especially castability. Aluminium alloys are known for their low density, which in connection with high mechanical properties and relatively low price create very good structural material. Magnesium addition to the Al-Si alloys enables their age-hardening, resulting in even better mechanical properties. However, formation of the microstructure of the alloy has to be precisely controlled to avoid formation of massive, brittle silicon crystal. Presence of large, platelet-like particles of silicon, dramatically decreases material mechanical properties. Second factor, which must be taken into consideration is casting porosity, which may significantly decrease fatigue life of the element. Many researches consider effect of modification or refining on the microstructure of the castings made from the Al-Si alloys. However there is lack of detailed investigation on the mould components influence on the microstructure. Such components may be protective coatings applied for the mould sand during the gravity casting of Al-Si alloys. Following paper presents results of the research on the influence of applied mould protective coatings on the microstructure of AlSi7Mg sand cast alloy. Five different protective coatings were applied. Macro observations, qualitative and quantitative microstructure evaluation of the AlSi7Mg alloy was conducted during the researches. Results revealed, that application of the coatings does not influence the size and distribution of the α- Al dendrites, however it influences size of Si particles in a significant way. It was revealed that application of water-based coatings affects the heat flow in the mould material-liquid alloy system, thus causing growth of silicon particles.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 13-16
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Refining and the Cooling Rate on Microstructure and Mechanical Properties of AlSi7Mg Alloy
    Autorzy:
    Tupaj, M.
    Orłowicz, A. W.
    Mróz, M.
    Trytek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381386.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi7Mg alloy
    material compactness
    microstructure parameter
    mechanical properties
    stop AlSi7Mg
    zwięzłość materiału
    właściwości mechaniczne
    Opis:
    The paper presents results of research on the effect of conventional refining with hexachloroethane and the cooling rate vcool. ranging within the solidification temperature regime from 12.5°C/min to 94.5°C/min on compactness of the material, values of microstructure parameters λ2D, λE, lmaxSi, and mechanical properties Rm, R0,2, A5 of unmodified AlSi7Mg alloy after heat treatment (solution treatment 540°C/6 h/water 20°C and aging 175°C/8 h/air). It has been found that as a result of refining and increased cooling rate, an improvement of material compactness occurred (reduction of the density index by 0.4%) accompanied by a decrease of values of parameters characterizing the microstructure: λ2D by 54.4 μm; λE by 4,6 μm; and lmaxSi by 50 μm. As a result of these changes, the value of Rm increased by about 40 MPa and R0.2 improved by about 36 MPa, while the value of A5 decreased by 1.3%.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3 spec.; 83-86
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on Chip Breakability Index During Longitudinal Turning of Cast and DMLS Additively Manufactured AlSi10Mg Aluminum Alloy
    Autorzy:
    Struzikiewicz, Grzegorz
    Słodki, Bogdan
    Zębala, Wojciech
    Franczyk, Emilia
    Powiązania:
    https://bibliotekanauki.pl/articles/2022248.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    machining
    turning
    AlSi10Mg aluminum alloy
    additive manufacturing
    DMLS
    chip breakability
    Opis:
    The article presents selected issues related to the process of turning samples made of the AlSi10Mg alloy with the use of various manufacturing technologies, i.e. casting and DMLS (Direct Metal Laser Sintering). Machining processes of cylindrical surfaces of samples made with these two methods were subjected to a comparative analysis. The main idea behind the research was to develop guidelines for turning parts obtained using laser powder sintering. Study on the influence of cutting parameters on the value of breakability index Cin. as well as the type, shape and form of chips produced during longitudinal turning is presented. The chips were also measured and the results of the microscopic analysis of the chips form are described. Results showed that the values of Cin index for turning of the cast AlSi10MG alloy depend mainly on the value of feed f. According to adopted chip classification for the feed value of f > 0.1 mm/rev the chips had a favorable, short form. In the case of turning the sample obtained by the DMLS method, the values of the chip breakability index Cin are not significantly dependent on the adopted ranges of cutting parameters. The Taguchi method was used to develop the conclusions obtained on the basis of the research results.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 1; 28-35
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examples of new models applied in selected simulation systems with respect to database
    Autorzy:
    Ignaszak, Z.
    Hajkowski, J.
    Popielarski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/379975.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technology
    foundry industry
    porosity prediction
    structure prediction
    database
    thermophysical parameters
    simulation codes
    AlSi alloy
    technologia informacyjna
    przemysł odlewniczy
    przewidywanie struktury
    baza danych
    parametr termofizyczny
    stop Al-Si
    Opis:
    The tolerance of damage rule progressively meets the approval in the design casting parts procedures. Therefore, there were appeared the new challenges and expectations for permanent development of process virtualization in the mechanical engineering industry. Virtualization is increasingly developed on the stage of product design and materials technologies optimization. Increasing expectations of design and process engineers regarding the practical effectiveness of applied simulation systems with new proposed up-grades modules is observed. The purpose is to obtain simulation tools allowing the most possible realistic prognosis of the casting structure, including indication, with the highest possible probability, places in the casting that are endangered with the possibility of shrinkage– and gas porosity formation. This 3D map of discontinuities and structure transformed in local mechanical characteristics are used to calculate the local stresses and safety factors. The needs of tolerance of damage and new approach to evaluate the quality of such prognosis must be defined. These problems of validation of new models/modules used to predict the shrinkage– and gas porosity including the chosen structure parameters in the example of AlSi7 alloy are discussed in the paper.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1; 45-50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Cracking Causes of AlSi5Cu3 Alloy Castings
    Określenie przyczyn pękania odlewów ze stopu AlSi5Cu3
    Autorzy:
    Eperješi, Š.
    Matvija, M.
    Eperješi, Ľ.
    Vojtko, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353242.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi5Cu3 alloy
    microstructure
    cracks
    hardness
    stop AlSi5Su3
    mikrostruktura
    pękanie
    twardość
    Opis:
    Recently, the castings made from aluminum-silicon alloys by pressure die casting are increasingly used in the automotive industry. In practice, on these castings are high demands, mainly demands on quality of their structure, operating life and safety ensuring of their utilization. The AlSi5Cu3 alloy castings are widely used for production of car components. After the prescribed tests, the cracks and low mechanical properties have been identified for several castings of this alloy, which were produced by low pressure casting into a metal mould and subsequent they were heat treated. Therefore, analyses of the castings were realized to determine the causes of these defects. Evaluation of structure of the AlSi5Cu3 alloy and causes of failure were the subjects of investigation presented in this article.
    Zastosowanie odlewów ciśnieniowych ze stopów Al-Si ustawicznie wzrasta w przemyśle samochodowym, gdzie stopy te muszą spełniać wysokie wymagania odnośnie do jakości ich struktury, żywotności i bezpiecznego użytkowania. Odlewy ze stopu AlSi5Cu3 są szeroko stosowane w produkcji części samochodów. Wg pracy wady pęknięć wewnętrznych i niskie właściwości mechaniczne posiada część odlewów obrabianych cieplnie, odlanych do form metalowych pod niskim ciśnieniem. Praca poświęcona jest ocenie struktury i przyczynom pękania odlewów ze stopu AlSi5Cu3.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 3; 1089-1092
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Age Hardening Parameters on the Microstructure and Properties of the AlSi7Mg Sand Cast Alloy
    Wpływ parametrów utwardzania wydzieleniowego na strukturę i właściwości stopu AlSi7Mg
    Autorzy:
    Poloczek, Ł.
    Dybowski, B.
    Rodak, K.
    Jarosz, R.
    Kiełbus, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/352479.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi7Mg alloy
    sand casting
    microstructure
    electrical conductivity
    hardness
    heat treatment
    AlSi7Mg
    mikrostruktura
    przewodność elektryczna
    twardość
    obróbka cieplna
    Opis:
    Aluminium alloys are characterized by a low density, acceptable mechanical properties and good technological properties. This unique connection of features made aluminium alloys perfect structural material for the transportation industry. Also, due to their good electrical conductivity they also found application in energy production industry. High mechanical properties and electrical conductivity of the Al-Si alloys with Mg addition may be achieved by heat treatment. However, the highest mechanical properties are achieved in the early stages of age hardening - due to precipitation of coherent phases, while high electrical conductivity may be achieved only by prolonged aging, during precipitation of semi-coherent or fully noncoherent, coarse phases. Carefully heat treated AlSi7Mg alloy may exhibit both fairly high electrical conductivity and slightly increased mechanical properties. The following article present results of the research of influence of heat treatment on the properties and microstructure of sand cast AlSi7Mg alloy. Microstructure observations were performed using light microscopy, scanning electron and scanning-transmission electron microscopy. Hardness and electrical conductivity of the AlSi7Mg alloy were investigated both in as-cast condition and after heat treatment. Maximum hardness of the alloy is achieved after solutioning at 540°C for 8h, followed by 72h of aging at 150°C, while maximal electrical conductivity after solutioning at 540°C for 48h, followed by 96h of aging at 180°C. Increase of the electrical conductivity is attributed to increasing distance between Si crystals and precipitation of semi coherent phases.
    Stopy aluminium charakteryzują się małą gęstością, dobrymi właściwościami mechanicznymi, a przy tym bardzo dobrymi właściwościami odlewniczymi. Połączenie tych cech powoduje że stopy te znajdują szerokie zastosowanie w przemyśle motoryzacyjnym. Ich dużą zaletą jest również wysoka przewodność elektryczna oraz cieplna, dzięki której znajdują również zastosowanie w przemyśle energetycznym. Uzyskanie tak wysokich właściwości mechanicznych i przewodności elektrycznej w przypadku stopów Al-Si z dodatkiem Mg może być osiągnięte tylko poprzez przeprowadzenie obróbki cieplenj. Najwyższe właściwości mechaniczne są osiągane w początkowej fazie utwardzania wydzieleniowego (wydzielanie się koherentnych faz), podczas gdy uzyskanie wysokich wartości przewodności może być osiągnięte tylko przez długotrwałe starzenie, podczas wydzielania się pół koherentnych lub niekoherentnych, dużych faz. W przypadku stopu AlSi7Mg, starannie dobrana obróbka cieplna może powodować znaczne podwyższenie przewodności oraz polepszenie właściwości mechanicznych. Ninjiejszy artykuł przedstawia wyniki badań wpływu parametrów obróbki cieplnej na strukturę i właściwości stopu AlSi7Mg, odlanego grawitacyjnie do form piaskowych. Obserwacje mikrostruktury prowadzone były prz użyciu metod mikroskopii świetlnej, elektronowej mikroskopii skaningowej oraz elektronowej mikroskopii transmisyjnej. Twardość i przewodności stopu AlSi7Mg badano zarówno w stanie lanym, jak i po obróbce cieplnej. Maksymalną twardość stopu uzyskano po przesycaniu w 540°C przez 8h oraz starzeniu w temperaturze 150°C przez 72h. Maksymalną przewodność elektryczną uzyskano po przesycaniu w 540° C przez 48h, oraz starzeniem w temperaturze 180°C przez 96h. Wzrost przewodności elektrycznej spowodowany jest zwiększeniem się odległości pomiędzy kryształami Si oraz wydzielaniem się półkoherentnych faz.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 4; 3035-3042
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Titanium Addition on the Pro-Eutectic and Eutectic Phases of AlSi9 Cast Alloy
    Autorzy:
    Ait El Haj, Badiâ
    Bouayad, Aboubakr
    Alami, Mohammed
    Powiązania:
    https://bibliotekanauki.pl/articles/353725.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi9 cast alloy
    grain refinement
    thermal analysis
    eutectic phase
    Secondary Dendrite Arm Spacing
    SDAS
    Opis:
    In this study, the effects of grain size refiner addition and various pre-heating mold temperatures on AlSi9 cast alloy microstructure and solidification have been evaluated. For different process conditions, thermal analysis was performed for all samples and cooling curves were established. Important parameters in liquidus and eutectic Si-phase regions have been calculated usingthe first derivative cooling curves. Secondary Dendrite Arm Spacing (SDAS) variation was also determined. Experimental results question the effectiveness of cooling curve parameters in providing the microstructure data as a function of refinement. The present work shows that the effect of grain refiner addition on the value of SDAS was higher when the solidification time was lower. It indicated that the solidification parameters such as nucleation temperatures of α-Al phase, undercooling temperature and total solidification time were affected by grain refinement. It has been found that the addition of grain refiner affect the eutectic phase formation time. However, it has no effect on the eutectic phase morphology.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 1; 385-391
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Residual Stresses of AlSi10Mg Fabricated by Selective Laser Melting (SLM)
    Autorzy:
    Karolus, M.
    Maszybrocka, J.
    Stwora, A.
    Skrabalak, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/351959.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi10Mg alloy
    Selective Laser Melting
    SLM
    XRD
    residual stress–sin2ψ method
    texture
    Opis:
    The aim of the paper is the residual stress analysis of AlSi10Mg material fabricated by selective laser melting (SLM). The SLM technique allows to product of complex geometries based on three-dimensional model, in which stiffness and porosity can be precisely designed for specific uses. As the studied material, there were chosen solid samples built in two different directions: parallel (P-L) and perpendicular (P-R) to the tested surface and cellular lattice built in perpendicular direction, as well. In the paper, for the complex characterization of obtained materials, the phase analysis, residual stress and texture studies were performed. The classical non-destructive sin2ψ method was used to measure the residual stress measurements. The final products, both solid sample and cellular lattice, have a homogeneous phase composition and consist of solid solution Al(Si) (Fm-3m) type, Si (Fd-3m) and Mg2 Si (Pnma). The obtained values of the crystallite size are in a range of 1000 Å for Al(Si), 130-180 Å for Si phase. For Mg2 Si phase, the crystallite sizes depend on sintering process, they are 800 Å for solid samples and 107 Å for cellular lattice. The residual stress results have the compressive character and they are in a range from –5 to –15 MPa.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 1011-1016
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigations of the Influence of the Zone of Chills on the Casting Made of AlSi7Mg Alloy with Various Wall Thicknesses
    Autorzy:
    Piękoś, M.
    Zych, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/379681.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical properties
    thermal characteristics
    cooling rate
    AlSi7Mg alloy
    chill
    właściwości mechaniczne
    charakterystyka termiczna
    tempo schładzania
    stop AlSi7Mg
    Opis:
    The influence of the chill on the AlSi7Mg alloy properties after the heat treatment T6, was realised in the system of the horizontally cast plate of dimensions 160x240 mm and thickness of 10 and 15 m. The cooling course in individual casting zones was recorded, which allowed to determine the solidification rate. Castings were subjected to the heat treatment T6 process. Several properties of the alloy such as: hardness BHN, density, tensile strength UTS, elongation %E were determined. The microstructure images were presented and the structural SDAS parameter determined. The performed investigations as well as the analysis of the results allowed to determine the influence zone of the chill. The research shows that there is a certain dependence between the thickness of the casting wall and the influence zone of the chill, being not less than 2g, where g is the casting wall thickness. The next aim of successive investigations will be finding the confirmation that there is the dependence between the casting wall thickness and the influence zone of the chill for other thicknesses of walls. We would like to prove that this principle is of a universal character.
    Źródło:
    Archives of Foundry Engineering; 2019, 1; 127-132
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relation between Porosity and Mechanical Properties of Al-Si Alloys Produced by Low- Pressure Casting
    Autorzy:
    Cais, J.
    Weiss, V.
    Svobodova, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/379877.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical properties
    castings defects
    porosity
    alloy AlSi7Mg
    intermetallic phases
    wady odlewów
    właściwości mechaniczne
    porowatość
    stop AlSi7Mg
    faza międzymetaliczna
    Opis:
    The aim of the research was to evaluate influence of porosity size on mechanical properties of AlSi7Mg0.3 (EN AC 42 100) alloy before and after thermal treatment. The castings from the same production type (forms used for tires production) were used for the analysis. They were casted using low-pressure casting technology. Since the negative influence of porosity on mechanical properties of Al alloys is generally known that there is no quantitative assessment. The relation of porosity size in the structure of AlSi7Mg0.3 alloy and its mechanical properties is verified and quantified in this research. Static tensile testing has proven the relation between porosity size in a structure of an Al material and its mechanical properties. The image analysis was applied in quantitative measurement of the porosity. The measurement was performed on prepared metallographic specimens. Porosity size is considered as a fraction of pore area to the total area of the analyzed specimen and is taken in percentage. As far as the theoretical part of the issue the possible causes of porosity formation and its influence on particular Al alloy types are described [1, 2, 3].
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 97-102
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Iron Intermetallic Phases in the Alloy Based on Al-Si-Mg by Applying Manganese
    Autorzy:
    Podprocka, R.
    Bolibruchova, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/380327.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    intermetallic phases
    alloy AlSi7Mg
    needle Al5FeSi phase
    applying manganese
    manganese
    fazy międzymetaliczne
    stop AlSi7Mg
    zastosowanie manganu
    mangan
    Opis:
    Manganese is an effective element used for the modification of needle intermetallic phases in Al-Si alloy. These particles seriously degrade mechanical characteristics of the alloy and promote the formation of porosity. By adding manganese the particles are being excluded in more compact shape of “Chinese script” or skeletal form, which are less initiative to cracks as Al5FeSi phase. In the present article, AlSi7Mg0.3 aluminium foundry alloy with several manganese content were studied. The alloy was controlled pollution for achieve higher iron content (about 0.7 wt. % Fe). The manganese were added in amount of 0.2 wt. %, 0.6 wt. %, 1.0 wt. % and 1.4 wt. %. The influence of the alloying element on the process of crystallization of intermetallic phases were compared to microstructural observations. The results indicate that increasing manganese content (> 0.2 wt. % Mn) lead to increase the temperature of solidification iron rich phase (TAl5FeSi) and reduction this particles. The temperature of nucleation Al-Si eutectic increase with higher manganese content also. At adding 1.4 wt. % Mn grain refinement and skeleton particles were observed.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 217-221
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vanadium Influence on Iron Based Intermetallic Phases in AlSi6Cu4 Alloy
    Wpływ wanadu na fazy żelazowe w stopie AlSi6Cu4
    Autorzy:
    Bolibruchová, D.
    Žihalová, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/354052.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi6Cu4 alloy
    iron correction
    vanadium
    iron based phases
    stop AlSi6Cu4
    redukcja żelaza
    wanad
    fazy żelazowe
    Opis:
    Negative effect of iron in Al-Si alloys mostly refers with iron based intermetallic phases, especially Al5FeSi phases. These phases are present in platelet-like forms, which sharp edges are considered as main cracks initiators and also as contributors of porosity formation. In recent times, addition of some elements, for example Mn, Co, Cr, Ni, V, is used to reduce influence of iron. Influence of vanadium in aluminium AlSi6Cu4 alloy with intentionally increased iron content is presented in this article. Vanadium amount has been graduated and chemical composition of alloy has been analysed by spectral analysis. Vanadium influence on microstructural changes was evaluated by microstructural analysis and some of intermetallic particles were reviewed by EDX analysis.
    Negatywny wpływ żelaza w stopach Al-Si związany jest głównie z tworzeniem faz międzymetalicznych, szczególnie Al5FeSi. Fazy te występują w postaci płytkowej, których ostre krawędzie uważa się za główna przyczynę inicjacji pęknięć oraz zarodkowania porowatości. Obecnie w celu redukowania wpływu żelaza wprowadza się dodatek niektórych pierwiastków, np. Mn, Co, Cr, Ni, V. Wpracyprzedstawia się wpływ wanadu w stopie AlSi6Cu4 z celowo zwiększoną zawartością żelaza. W badaniach dodatek wanadu był stopniowany, a skład chemiczny określano w analizie spektralnej. Wpływ wanadu na zmiany strukturalne określono na drodze analizy mikrostruktury, natomiast cząstki faz międzymetalicznych opisano za pomocą analizy EDX.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 3; 1029-1032
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Usable Properties of AlSi7Mg Alloy after Sodium or Strontium Modification
    Autorzy:
    Tupaj, M.
    Orłowicz, A. W.
    Mróz, M.
    Trytek, M.
    Markowska, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/381773.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    alloy AlSi7Mg
    refining
    modification
    cooling rate
    microstructural parameters
    usable properties
    stop AlSi7Mg
    rafinacja
    modyfikacja
    szybkość chłodzenia
    parametry mikrostruktury
    właściwości użytkowe
    Opis:
    The paper deals with the effect of microstructure diversified by means of variable cooling rate on service properties of AlSi7Mg cast alloy refined traditionally with Dursalit EG 281, grain refining with titanium-boron and modified with sodium and a variant of the same alloy barbotage-refined with argon and simultaneously grain refining with titanium-boron and modified with strontium. For both alloy variants, the castings were subject to T6 thermal treatment (solution heat treatment and artificial aging). It turned out that AlSi7Mg alloy after simultaneous barbotage refining with argon and grain refining with titanium-boron and modified with strontium was characterised with lower values of representative microstructure parameters (SDAS – secondary dendrite arm spacing, λE, lmax) and lower value of the porosity ratio compared to the alloy refined traditionally with Dursalit EG 281 and grain refining with titanium-boron and modified with sodium. The higher values of mechanical properties and fatigue strength parameters were obtained for the alloy simultaneously barbotage-refined with argon and grain refining with titanium-boron and modified with strontium.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 129-132
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fatigue Properties of AlSi7Mg Alloy with Diversified Microstructure
    Autorzy:
    Tupaj, M.
    Orłowicz, A. W.
    Mróz, M.
    Trytek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380962.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi7Mg03 alloy
    alloy refining
    alloy modification
    cooling rate
    microstructure parameter
    fatigue strength
    stop AlSi7Mg03
    rafinacja stopu
    modyfikacja stopu
    szybkość chłodzenia
    parametr mikrostrukturalny
    wytrzymałość zmęczeniowa
    Opis:
    The paper discusses the effect of microstructure on the fatigue strength of AlSi7Mg casting alloy refined conventionally with hexachloroethane without modifying and modified with TiB and Na. Castings made of both alloy variants were subjected to T6 heat treatment. It turned out that the applied refining secured satisfactory compactness of the material. In view of absence of gas and shrinkage porosity in the castings, short cracks nucleated on largest silicon precipitates and largest intermetallic phase precipitations as these were the locations where stress concentrations reached their highest values. Comprehensive modification of the alloy resulted in reduction of the value of SDAS parameter characterizing α(Al) phase dendrites, a decrease of the distance between silicone precipitates in the eutectic λE, and a decrease of the maximum size of silicone precipitates lmaxSi. The ultimate effect of these changes was an increase of the fatigue strength.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3 spec.; 87-90
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elimination of Iron Based Particles in Al-Si Alloy
    Autorzy:
    Bolibruchová, D.
    Richtárech, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/379484.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    secondary AlSi7Mg0.3 alloy
    iron phases
    iron correctors
    AlCr20
    stop AlSi7Mg0,3
    faza żelazowa
    usuwanie żelaza
    Opis:
    This paper deals with influence on segregation of iron based phases on the secondary alloy AlSi7Mg0.3 microstructure by chrome. Iron is the most common and harmful impurity in aluminum casting alloys and has long been associated with an increase of casting defects. In generally, iron is associated with the formation of Fe-rich phases. It is impossible to remove iron from melt by standard operations, but it is possible to eliminate its negative influence by addition some other elements that affect the segregation of intermetallics in less harmful type. Realization of experiments and results of analysis show new view on solubility of iron based phases during melt preparation with higher iron content and influence of chrome as iron corrector of iron based phases. By experimental work were used three different amounts of AlCr20 master alloy a three different temperature of chill mold. Our experimental work confirmed that chrome can be used as an iron corrector in Al-Si alloy, due to the change of intermetallic phases and shortening their length.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1; 9-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilisation of mould temperature change in eliminating the Al5FeSi phases in secondary AlSi7Mg0.3 alloy
    Autorzy:
    Bolibruchová, D.
    Richtárech, L.
    Dobosz, S. M.
    Major-Gabryś, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/355395.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi7Mg0,3 alloy
    correctors of iron
    recycled materials
    iron based intermetallic phase
    thermal analysis
    Opis:
    This article describes the impact of the metal mould temperature change in eliminating the adverse effect of iron in the AlSi7Mg0.3 alloy. The kind of phases based on iron to be formed in aluminium alloys is determined by the alloy chemical composition, the melt overheating temperature prior to casting, and the cooling rate during crystallisation. In the experiment, we used three various mould temperatures, and their impact on the possible change in the adverse Al5FeSi phase, excreted in a needle form to a more compact form of Chinese writing or skeleton units. The experimental part did not use melt overheat that would result in impairment of the melt, for example due to increased gassing of the melt, as well as in a greater load on the smelting unit, thus resulting in increased energy expenditure. We can conclude from the obtained results that the mould temperature change does not have an adequate effect in eliminating the adverse effect of iron in Al-Si-Mg alloys.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 339-344
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of porosity in Al alloy die castings
    Autorzy:
    Říhová, M.
    Cech, J.
    Havlíčková, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/382450.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stop AlSi9Cu3
    odlewnictwo
    kadłub silnika
    porowatość
    wielkość mechaniczna
    symulacja
    AlSi9Cu3 alloy
    casting
    engine block
    porosity
    mechanical values
    simulation
    Opis:
    Mechanical properties of an Al-alloy die casting depend significantly on its structural properties. Porosity in Al-alloy castings is one of the most frequent causes of waste castings. Gas pores are responsible for impaired mechanical-technological properties of cast materials. On the basis of a complex evaluation of experiments conducted on AlSi9Cu3 alloy samples taken from the upper engine block which was die-cast with and without local squeeze casting it can be said that castings manufactured without squeeze casting exhibit maximum porosity in the longitudinal section. The area without local squeeze casting exhibits a certain reduction in mechanical properties and porosity increased to as much as 5%. However, this still meets the norms set by SKODA AUTO a.s.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1; 93-98
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Manganese and Iron Content on Morphology of Iron Intermetallic Phases in AlSi7Mg0.3 Alloy
    Autorzy:
    Podprocká, R.
    Bolibruchová, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382655.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi7Mg0,3 alloy
    needle Al5FeSi phase
    manganese
    phase morphology
    stop AlSi7Mg0,3
    mangan
    morfologia fazy
    Opis:
    Iron is presented as an impurity in Al-Si alloys and occurs in the form of the β-Al5FeSi phase formations. The presence of iron and other elements in the alloy causes the formation of large intermetallic phases. Due to the high brittleness of this phase, it reduces the mechanical properties and increases the porosity. Manganese is used to inhibit the formation of this detrimental phase. It changes the morphology of the phase to polyhedral crystals, skeletal formations, or Chinese script. The present article deals with the influence of various amounts of manganese (0.1; 0.2; 0.4; 0.6 wt. %) on the formation of iron-based intermetallic phases in the AlSi7Mg0.3 alloy with different levels of iron content (0.4; 0.8, 1.2 wt. %). The increase of iron content in each alloy caused the creation of more intermetallic compounds and this effect has been more significant with higher concentrations of manganese. In alloys where the amount of 1.2 wt. % iron is present, the shape of eutectic silicon grain changes from angular to short needle type.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 95-99
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Nickel Addition on Properties of Secondary AlSi7Mg0.3 Alloy
    Autorzy:
    Richtárech, L.
    Bolibruchová, D.
    Brůna, M.
    Caiss, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/379900.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    secondary AlSi7Mg0.3 alloy
    iron phases
    thermal analysis
    iron correctors
    stop AlSi7Mg0,3
    faza żelazowa
    analiza termiczna
    usuwanie żelaza
    Opis:
    This paper deals with influence on segregation of iron based phases on the secondary alloy AlSi7Mg0.3 microstructure by nickel. Iron is the most common and harmful impurity in aluminum casting alloys and has long been associated with an increase of casting defects. In generally, iron is associated with the formation of Fe-rich intermetallic phases. It is impossible to remove iron from melt by standard operations. Some elements eliminates iron by changing iron intermetallic phase morphology, decreasing its extent and by improving alloy properties. Realization of experiments and results of analysis show new view on solubility of iron based phases during melt preparation with higher iron content and influence of nickel as iron corrector of iron based phases.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 95-98
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Self-Hardening AlZn10Si8Mg Aluminium Alloy as an Alternative Replacement for AlSi7Mg0.3 Aluminium Alloy
    Autorzy:
    Vicent, M.
    Fabian, P.
    Tillova, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/381802.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    secondary AlSi7Mg0.3 alloy
    alloy AlZn10Si8Mg
    heat treatment
    self-hardening
    stop wtórny
    stop AlZnSiMg
    obróbka cieplna
    samoutwardzanie
    Opis:
    This article deals with the fatigue properties of newly used AlZn10Si8Mg aluminium alloy where the main aim was to determine the fatigue strength and compare it with the fatigue strength of AlSi7Mg0.3 secondary aluminium alloys which is used in the automotive industry for cyclically loaded components. AlZn10Si8Mg aluminium alloy, also called UNIFONT 90, is self-hardening (without heat treatments), which contributes to economic efficiency. This is one of the main reasons why is compared, and may be an alternative replacement for AlSi7Mg0.3 alloy which is heat treated to achieve required mechanical properties. The experiment results show that the fatigue properties of AlZn10Si8Mg alloy are comparable, if not better, than AlSi7Mg0.3 alloy. Fatigue properties of AlZn10Si8Mg alloy are achieved after seven days of natural ageing, immediately after casting and achieving value of fatigue strength is caused by structural components formed during solidification of the melt.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 139-142
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the AlCr20 Addition on the Microstructure of Secondary AlSi7Mg0.3 Alloy
    Autorzy:
    Bolibruchova, D.
    Richtarech, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/383113.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    secondary AlSi7Mg0.3 alloy
    iron based alloys
    iron phases
    thermal analysis
    iron correctors
    heat treatment
    stop AlSi7Mg0,3
    analiza termiczna
    obróbka cieplna
    żelazo
    zanieczyszczenie stopu
    Opis:
    This paper deals with influence of chrome addition and heat treatment on segregation of iron based phases in the secondary alloy AlSi7Mg0.3 microstructure by chrome and heat treatment. Iron is the most common and harmful impurity in aluminum casting alloys and has long been associated with an increase of casting defects. In generally, iron is associated with the formation of Fe-rich intermetallic phases. It is impossible to remove iron from melt by standard operations, but it is possible to eliminate its negative influence by addition some other elements that affect the segregation of intermetallics in less harmful type or by heat treatment. Realization of experiments and results of analysis show new view on solubility of iron based phases during melt preparation with higher iron content and influence of chrome as iron corrector of iron based phases.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 9-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of strain rate and temperature on the mechanical behaviour of additively manufactured AlSi10Mg alloy – experiment and the phenomenological constitutive modelling
    Autorzy:
    Stanczak, Magda
    Rusinek, Alexis
    Broniszewska, Paula
    Fras, Teresa
    Pawłowski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2173665.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSi10Mg aluminum alloy
    additive manufacturing
    DMLS method
    direct metal laser sintering
    compression
    SHPB experiment
    constitutive model
    stop aluminium AlSi10Mg
    produkcja dodatkowa
    metoda DMLS
    bezpośrednie spiekanie laserowe metali
    kompresja
    eksperyment SHPB
    model konstytutywny
    Opis:
    The paper is related to the material behaviour of additively manufactured samples obtained by the direct metal laser sintering (DMLS) method from the AlSi10Mg powder. The specimens are subjected to a quasi-static and dynamic compressive loading in a wide range of strain rates and temperatures to investigate the influence of the manufacturing process conditions on the material mechanical properties. For completeness, an analysis of their deformed microstructure is also performed. The obtained results prove the complexity of the material behaviour; therefore, a phenomenological model based on the modified Johnson–Cook approach is proposed. The developed model describes the material behaviour with much better accuracy than the classical constitutive function. The resulted experimental testing and its modelling present the potential of the discussed material and the manufacturing technology.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 4; art. no. e141983
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical properties and microstructure of AlSi10Mg alloy obtained by casting and SLM technique
    Autorzy:
    Zyguła, Krystian
    Nosek, Bartłomiej
    Pasiowiec, Hubert
    Szysiak, Norbert
    Powiązania:
    https://bibliotekanauki.pl/articles/1177412.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    AlSi10Mg
    SLM - selective laser melting
    aluminium alloy
    heat treatment
    mechanical properties
    microstructure
    Opis:
    Selective laser melting (SLM) techniques are gaining popularity recently. Due to increasing requirements of the manufacturing industry regarding cost production reduction, methods based on additive manufacturing (AM) are more and more attractive. SLM method allows fabricating parts with minimum post-processing machining requirements. Considering the above, this technique is applied mainly in aviation, automotive industry and medicine. Manufacturing parts by SLM method demands strictly defined parameters in particular when using aluminium alloys, due to high risk of porosity. The aim of research was to evaluate the possibility of replacing traditional casting of small-lot details by novel SLM method in specified manufacturing conditions. This study contains comparison of chosen physical and mechanical properties of AlSi10Mg alloy obtained by SLM method and by casting. As-received as well as heat treated (T6 heat treatment) materials were examined. Both types of the billets were subjected to hardness, tensile and Charpy impact tests, before and after T6 heat treatment. For SLM material relative density was also specified. Microstructure of cast and SLM samples was analyzed using light microscopy. The results of the research lead to conclusion, that the key aspect is the appropriate selection of parameters of manufacturing of the parts by SLM method.
    Źródło:
    World Scientific News; 2018, 104; 456-466
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of AlSi7Mg0.6 Alloy by Selective Laser Melting: Mechanical Properties, Microstructure, Heat Treatment
    Autorzy:
    Mauduit, Arnold
    Gransac, Hervé
    Auguste, Pierre
    Pillot, Sébastien
    Powiązania:
    https://bibliotekanauki.pl/articles/106967.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    AlSi7Mg0.6 (A357) alloy
    selective laser melting
    heat treatment (T6, soft annealing, artificial aging)
    Opis:
    This study presents a panorama of the AlSi7Mg0.6 (A357) aluminum alloy in additive manufacturing by selective laser melting. The document is mainly interested in the metallurgical tempers obtained after manufacture and after heat treatment; it quickly cover the process. The results concerning the material integrity (porosity), mechanical properties, microstructures, residual stresses, etc., are presented in order to best define the technological capacities of these metallurgical tempers: as-built, soft annealed, T6, and artificial aging. Some information on the mechanisms and kinetics of precipitation is also presented using the Johnson–Mehl–Avrami–Kolmogorov model. Finally, the conclusion proposes an inventory (advantages/disadvantages) of the metallurgical tempers obtained to better understand the industrial applications.
    Źródło:
    Journal of Casting & Materials Engineering; 2019, 3, 1; 1-13
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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