Microstructures of Mg-Al-Zn and Al-Si-Cu cast alloys

作者: T. Tański , L. A. Dobrzański , R. Maniara

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摘要: Purpose: The aim of this paper was to investigate the structure MCMgAl6Zn1 magnesium and ACAlSi9Cu aluminium cast alloy in as-cast state. Design/methodology/approach: following results concern microstructure alloys using ZEISS SUPRA 25, Opton DSM-940 scanning LEICA MEF4A light microscopy, X-ray qualitative microanalysis as well analysis. Findings: analysis consists solid solution α – Mg (matrix) secondary phase g Mg17Al12 evenly located structure. creates agglomerates form needle precipitations, partially coherent with matrix placed mostly at grain boundaries. AC AlSi9Cu AlSi9Cu4 are characterised by a dendritic matrix, discontinuous β–Si forming α+β eutectic grains, morphology depending on silicon copper mass concentration. Research limitations/implications: Taking into account fact that some properties great importance only for surface material, future investigation will modelling layers deposition methods like physical vapour methods. Practical implications: A desire create vehicle constructions possible connected low fuel consumption have made it make use constructional material automotive industry. Originality/value: Contemporary materials should possess high mechanical properties, chemical, technological ones, ensure long reliable use. above mentioned requirements expectations regarding contemporary met non-ferrous metals used nowadays, including alloys.

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