Microstructures and Mechanical Properties of a Novel Mg-Gd-Y-Zn-Zr Alloy

Abstract:

The microstructure characteristics and mechanical properties of as-cast and hot extruded Mg-5Gd-4Y-0.5Zn-0.5Zr (GWZ540) alloy were investigated. The results show that coarse the as-cast GWZ540 alloy consisted of α-Mg grain and two second phases, disc-like Mg₅(Zn_0.2Y_0.2Gd_0.6) and block-shaped Mg₂₄(Y_0.6Gd_0.4)₅. Hot extrusion resulted in a significant refinement of the α-Mg grains and a uniform distribution of the second phases, but with little effect on the composition and structure of the second phases. It is also shown that GWZ540 alloy exhibits higher UTS and TYS and elongation at both room and elevated temperature than those of WE54 alloy.

• Periodical: Materials Science Forum (Volume 765)
• Pages: 521-524
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.765.521
• Online since: July 2013
• Authors: Zhong Yang, Jian Ping Li, Yan Rong Wang, Bi Wei Xiong
• Keywords: Mechanical Property, Mg Alloy, Mg-5Gd-4Y-0.5Zn-0.5Zr, Microstructure

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