Microstructures and Mechanical Properties of Mg-4.5Gd- 2.6Nd-0.5Zn-0.5Zr New Casting Alloy

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作者：
Zhan, Liang [1 ,2 ]
Le, Qichi [2 ]
Feng, Zhijun [1 ]
Lou, Yanchun [1 ]
Li, Huawen [3 ]
机构：
[1] State Key Laboratory of Light Alloy Casting Technology for High-end Equipment, Shenyang Research Institute of Foundry Co. Ltd, Shenyang,110022, China
[2] Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang,110819, China
[3] AECC Zhong Chuan Transmission Machinery Co. Ltd, Changsha,410200, China
来源：
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2020年 / 49卷 / 08期
关键词：
The microstructure and mechanical properties of Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr; a novel magnesium cast alloy; were investigated. The microstructure of the as-cast experimental alloy is determined to be composed of near-equiaxed α-Mg; Mg12(Nd; Gd); and Mg3Gd phases. After optimizing the heat treatment parameters; the YS; UTS; and A values reach 205 MPa; 325; MPa; and 4.0% at room temperature; and; 145; 245; and 18.5% at 250 oC. The strengthening mechanism of this alloy was also investigated. The fracture surfaces of Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr during tensile tests demonstrate that brittle fracture occurs at room temperature; and ductile fracture occurs at 250 oC accompanied by appearance of many dimples and tear ridges. Copyright © 2020; Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved;
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页码：2644 / 2648
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