Influence of Ca addition on microstructure, mechanical properties and corrosion behavior of Mg-2Zn alloy

被引：0
|
作者：
Hong-xiang Li
Shi-kai Qin
Chang-lin Yang
Ying-zhong Ma
Jian Wang
Yun-jin Liu
Ji-shan Zhang
机构：
[1] University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials
[2] Northwestern Polytechnical University,State Key Laboratory of Solidification Processing
来源：
China Foundry | 2018年 / 15卷
关键词：
magnesium alloys; Mg-Zn-Ca; microstructure; mechanical properties; corrosion behaviors; TG146.22;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The microstructure, mechanical properties and corrosion behaviors of as-cast ternary Mg-2Zn-xCa (x=0, 0.2, 0.4, 0.8) alloys have been investigated in this study. Results indicate that the microstructure of Mg-Zn-Ca alloys can be significantly refined with increasing Ca concentration. Moreover, the alloys with different contents of Ca exhibit the different phases formation behaviors, i.e. α-Mg + Ca2Mg6Zn3 phases for Mg-2Zn-0.2Ca and Mg-2Zn-0.4Ca alloys, and α-Mg + Ca2Mg6Zn3 + Mg2Ca phases for Mg-2Zn-0.8Ca alloy, respectively. Among all the alloys, the maximum ultimate tensile strength and elongation (161 MPa and 9.1%) can be attained for the Mg-2Zn-0.2Ca alloy. Corrosion tests in Hanks’ balanced salt solution indicated that Ca addition is detrimental to corrosion resistance of Mg-2Zn alloy. The relationship between as-cast microstructure and properties for different Ca-containing alloys is also discussed in detail.
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页码：363 / 371
页数：8
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