Effects of Solid Solution Treatments on Microstructures and Tensile Properties of a Mg-Y-Zn-Cu Alloy

Abstract:

In this study, a Mg-2.1Y-0.5Zn-0.6Cu-0.1Zr (WZC200, in at. %) alloy was prepared by permanent casting method. On the basis of thermal analysis results during solidification process, two temperatures (T₁/763K and T₂/773K) were selected for subsequent solid solution treatments. Microstructure evolution and the tensile property changes after T4 treatment at T₁ and T₂ for different holding time were also investigated in this study. The tensile testing results showed that yield strength and ultimate tensile strength were improved with the fraction increase of the lamellae-shaped LPSO phase in the grain interiors, rather than the total fraction of LPSO phase.

• Periodical: Materials Science Forum (Volumes 747-748)
• Pages: 449-456
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.747-748.449
• Online since: February 2013
• Authors: Bing Qing Shi, Rongshi Chen, Wei Ke
• Keywords: Long Period Stacking Order (LPSO) Structure, Magnesium Alloy, Mg-Y-Zn-Cu Alloy, Solid-Solution Treatment

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