Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 20    No. 3    March 2010

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Effect of Sb on microstructure and mechanical properties in
Mg-10Zn-5Al high zinc magnesium alloys
ZHANG Jin-shan(张金山), ZHANG Zhao-guang(张照光), ZHANG Yu-hua(张玉华),
LI Shan-hu(李山虎), LIU Ya-li(刘雅丽)

College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Abstract:In view of high strength and poor impact toughness of the high-zinc magnesium alloys, the method of micro-alloying was adopted to improve the impact-toughness of Mg-10Zn-5Al high zinc magnesium alloys by adjusting the addition of Sb. The results show that: the dystectic Mg3Sb2 particles formed by Sb and Mg are distributed in the front of dendrite, restrain the growth of the secondary phase and then change the morphology of the secondary phases, which refines the matrix in some extent and improves the impact-toughness of the alloy significantly. But with further increase of Sb addition, Mg3Sb2 particles congregate and form needle-like Mg3Sb2 phase, which dissevers the matrix and leads to the reduction of the strength and impact-toughness of the alloys. Hence, the mechanical prosperities of ZA105 high zinc magnesium alloy are significantly improved with appropriate Sb addition, which provides a new way to extend the application fields of high zinc magnesium alloy.

 

Key words: ZA105 high-zinc magnesium alloy; mechanical properties; secondary phase

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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