Section thickness-dependent tensile properties of squeeze cast magnesium alloy AM60
The development of alternative casting porcesses Is essential for the high demand of light weight magnesium components to be used In the automotive Industry, which often contain different section thicknesses. Squeeze casting with Its inherent advantages has been approved for the capability of minimizing the gas porosity In magnesium alloys. For advanced engineering design of light Integrity magnesium automotive applications, It Is critical to understand the effect of section thicknesses on mechanical properties of squeeze cast magnesium alloys. In this study, magnesium alloy AM60 with different section thicknesses of 6,10 and 20 mm squeeze cast under an applied pressure of 30 MPa was Investigated. The prepared squeeze cast AM60 specimens were tensile tested at room termperature. The results of tensile testing indicate that the mechanical properties including yield strength (YS), ultimate tensile strength (UTS) and elongation (Ef) decrease with an Increase In section thicknesses of squeeze cast AM60. The microstructure analysis shows that the improvement in the tensile behavior of squeeze cast AM60 Is primarily attributed to the low-gas porosity level and fine grain strucuture which resulted from the variation of cooling rates of different section thicknesses. The numerical simulation predicted that the solidification rate of the alloy decreased with an Increase In the section thickness. The computed solidification rates supported the experimental observation on grain structural development.
squeeze casting magnesium alloy AM60 tensile properties section thickness
Xuezhi Zhang Henry Hu
Department of Mechanical, Automotive and Materials Engineering, University of Windsor, 401 Sunset Ave., Windsor, Ontario Canada N9B 3P4
国际会议
The 11th Asian Foundry Congress(第11届亚洲铸造会议 AFC-11)
广州
英文
1-4
2011-11-12（万方平台首次上网日期，不代表论文的发表时间）