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Purpose: The aim of this paper was to investigate the structure of the MCMgAl6Zn1 magnesium and ACAlSi9Cu aluminium cast alloy in as-cast state. Design/methodology/approach: The following results concern the microstructure of the cast magnesium and aluminium alloys using ZEISS SUPRA 25, Opton DSM-940 scanning and LEICA MEF4A light microscopy, X-ray qualitative microanalysis as well as X-ray analysis. Findings: The analysis of the structure magnesium alloy consists of the solid solution á – Mg (matrix) of the secondary phase g – Mg17Al12 evenly located in the structure. The structure creates agglomerates in the form of needle precipitations, partially coherent with the matrix placed mostly at the grain boundaries. The AC AlSi9Cu and AC AlSi9Cu4 cast aluminium alloys are characterised by a dendritic structure of the á solid solution - as the alloy matrix, as well are characterised by a discontinuous â–Si phase forming the á+â eutectic grains, with a morphology depending on the silicon and copper mass concentration. Research limitations/implications: Taking into account the fact that some of the properties are of great importance only for the surface of the material, the future investigation will concern modelling of the alloy surface using surface layers deposition methods like physical vapour deposition methods. Practical implications: A desire to create as light vehicle constructions as possible and connected low fuel consumption have made it possible to make use of magnesium and aluminium alloys as constructional material in automotive industry. Originality/value: Contemporary materials should possess high mechanical properties, physical and chemical, as well as technological ones, to ensure long and reliable use. The above mentioned requirements and expectations regarding the contemporary materials are met by the non-ferrous metals alloys used nowadays, including the magnesium and aluminium alloys.
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Tom
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64--71
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Bibliogr. 17 poz., rys., tabl.
Twórcy
autor
autor
autor
- Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology,ul. Konarskiego 18a, 44-100 Gliwice, Poland, tomasz.tanski@polsl.pl
Bibliografia
- [1] E. F. Horst, B. L. Mordike, Magnesium Technology. Metallurgy, Design Data, Application, Springer-Verlag, Berlin Heidelberg 2006.
- [2] A. Fajkiel, P. Dudek, G. Sęk-Sas, Foundry engineering XXI c. Directions of metallurgy development and Ligot alloys casting, Publishers Institute of Foundry engineering, Cracow, 2002.
- [3] K. U. Kainem, Magnesium – Alloys and Technology, Wiley- VH, Weinheim, Germany, 2003.
- [4] H. Westengen, Magnesium Alloys: Properties and Applications Encyclopaedia of Materials: Science and Technology, 2008, 4746-4753.
- [5] M. Greger, R. Kocich, L. Cížek, L. A. Dobrzański, I. Juricka, Possibilities of mechanical properties and microstructure improvement of magnesium alloys, Archives of Materials Science and Engineering 28/2 (2007) 83-90.
- [6] W. Kasprzak, J. H. Sokołowski, M. Sahoo, L. A. Dobrzański, Thermal characteristic of the AM50 magnesium alloys, Journal of Achievements in Materials and Manufacturing Engineering 29/2 (2008) 179-182.
- [7] L. A. Dobrzański, T. Tański, Influence of aluminium content on behaviour of magnesium cast alloys in bentonite sand mould, Solid State Phenomena 147-149 (2009) 764-769.
- [8] L. A. Dobrzański, M. Król, T. Tański, R. Maniara, Effect of cooling rate on the solidification behaviour of magnesium alloys, Archives of Computational Materials Science and Surface Engineering 1/1 (2009) 21-24.
- [9] L. A. Dobrzański, T. Tański, J. Trzaska, Optimization of heat treatment conditions of magnesium cast alloys, Materials Science Forum 638-642 (2010) 1488-1493.
- [10] Z. Górny, J. Sobczak, Non-ferrous metals based novel materials in foundry practice, ZA-PIS, Cracow, 2005.
- [11] J. G. Kauffman, E. L. Rooy, Aluminum Alloy Castings, ASM International, Ohio, 2005.
- [12] A. K. Dahle, K. Nogita, S. D. McDonald, C. Dinnis, L. Lu, Eutectic Modification on Microstructure Development in Al–Si Alloys, Materials Science and Engineering A 413 (2005) 243-248.
- [13] Z. Muzaffer, Effect of copper and silicon content on mechanical properties in Al-Cu-Si-Mg alloys, Journal of Materials Processing Technology 169 (2005) 292-298.
- [14] P. Ouellet, F. H. Samuel, Effect of Mg on the ageing behaviour of Al-Si-Cu 319 type aluminium casting alloys, Journal of Materials Science 34 (1999) 4671 - 4697.
- [15] P. D. Lee, A. Chirazi, R. C. Atwood, W. Wan, Multiscale modelling of solidification microstructures, including microsegregation and microporosity, in an Al-Si-Cu alloy, Materials Science and Engineering A365 (2004) 57-65.
- [16] ASM Handbook, Aluminum and Aluminum Alloys, ASM International, Ohio, 1993.
- [17] L. Bäckerud, G. Chai, J. Tamminen, Solidification Characteristics of Aluminum Alloys, Vol. 2, AFS/SKANALUMINIUM, Illinois, 1990.
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Bibliografia
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bwmeta1.element.baztech-article-BOS2-0022-0016