Microstructures and tensile properties of Mg–Zn–(Gd)–Zr alloys extruded at various temperatures

被引：0
作者：
Xin Qiu
Qiang Yang
Kai Guan
Fanqiang Bu
Zhan-Yi Cao
Yong-Bing Liu
Jian Meng
机构：
[1] Jilin University,Key Laboratory of Automobile Materials of Ministry of Education, Department of Materials Science and Engineering
[2] Chinese Academy of Sciences,State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry
来源：
Rare Metals | 2017年 / 36卷
关键词：
Rare earth; Magnesium; Extrusion; Microstructure refinement; Tensile property;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The microstructures and tensile properties of Mg–6.0Zn–0.6Zr (ZK60) and ZK60 + 1.8Gd (ZEK620 (RE = Gd)) alloys extruded at 290, 305, 320, 340 and 360 °C were investigated. The results indicate that Gd addition can refine the microstructures of ZK60 alloy and the extrusion parameters such as the extrusion temperature will influence the tensile properties of both as-extruded ZK60 and ZEK620 alloys, although it is much slighter for ZK60 alloy. And the sensitivity is closely related to the textures developed during extrusion. In addition, Gd addition will also clearly improve the tensile strength at room temperature (24 °C) and particularly at high temperatures (150 and 200 °C), due to the much finer grains and smaller intermetallic particles. The highest strength is achieved in the as-extruded ZEK620 alloy with extrusion temperature of 320 °C, with ultimate tensile strength (UTS) and tensile yield strength (TYS) of 405 and 375 MPa, respectively, which are improved by approximately 9% and 11% than those of the as-extruded ZK60 alloy which owns the highest strength at extrusion temperature of 290 °C.
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页码：962 / 970
页数：8
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