INVESTIGATION OF MECHANICAL PROPERTIES OF AZ91D MAGNESIUM ALLOY BY GRAVITY DIE CASTING PROCESS
Keywords:
Magnesium alloys, Gravity die casting, Mechanical properties, porosity fraction.Abstract
In this study, the die casting materials particularly AZ91D is selected to know the mechanical properties by gravity die casting process at 680,710,740 and 780°C pouring temperatures. The mould is designed especially for Magnesium alloys and its temperature is maintained at 650°C for all casting process. The tensile specimens were obtained from the as cast sample and the mechanical properties were measured. The percentage, % of porosity is measured at different spots with respect to the ingate. The results shown that the lower pouring temperature results higher strength for Magnesium alloy (AZ91D). Further the highest percentage, % of porosity is obtained in the areas nearer to raiser and lower percentage, % of porosity is obtained nearer to the ingate. The highest tensile strength, yield strength, percentage, % of elongation, hardness and less percentage, % of porosity is obtained for the specimens taken nearer to the ingate which is the starting point of melt entry in to cavity. The effect of the porosity towards the mechanical properties was analyzed and discussed.References
Sung, B. S., Kim, I. S.,2008. The moulding analysis of automobile parts using the die casting system, Journal of Materials Processing Technology 201, 635-639.
Deming, G., Yuhui Z., Qin, H., and Qiqie Z., 2009. Study on mechanical properties of Mg-Al-Zn-Mn alloys cast by two different methods, Material Science and Engineering A, 507,1-5.
Gutman, Ya. Unigovsk, M. Levokovich, Z. Koren, E. Aghion, and M. Dangur.,1997. Influence of technological parameters of permanent mould casting and die casting of Mg alloyAZ91D-E.M. Material Science and Engineering, A 234-236, 880-883.
Nazari, E., Razavi, S.H., Boutorabi, S.M.A., 2010. Effect of filtration on the morphology and mechanical properties of Mg molten alloy entering the mould cavity, Journal of Materials Processing Technology 210, 461-465.
Leo Prakash, D.G., Rengener, D., 2009. Vorster, W.J.J. Effect of position on the tensile properties in high pressure die cast Mg alloy, Journal of Alloys and Compounds 470,111-116.
Zhu, T., Zhan W. C., Gao W., 2010. Effect of cooling conditions during casting on fraction of β- in Mg-9Al-1Zn cast alloy, Journal of Alloys and Compounds 501, 291-296.
Lun, S.S., Dube, D., Tremblay, R., 2008. An investigation on microstructural and mechanical properties of solid mould investment casting of AZ91D magnesium alloy, Materials Characterization 59,178-187.
Wei, Y-H, Hou, Li-F, Yang, Li-J, Xu, B-S, Kozuka, M, Ichinose, H., 2009. Microstructures and properties of die casting components with various thickness made of AZ91 D alloy Journal of Materials Processing Technology, 209, 3278- 3284.
Zhao, P., Geng, H., Wang, Q., 2006. Effect of melting technique on the microstructure and mechanical properties of AZ91 commercial magnesium alloys, Materials Science and Engineering, A429, 320-323.
Lee, C.D., 2007. Effect of grain size on the tensile properties of magnesium alloy, Materials Science and Engineering, A459, 355-360.
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