Effects of yttrium on microstructure and mechanical properties of Mg-Zn-Cu-Zr alloys

被引：16
作者：
Bai Y. [1 ]
Fang C.-F. [1 ]
Hao H. [1 ]
Qi G.-H. [1 ]
Zhang X.-G. [1 ]
机构：
[1] Research Center of Foundry Engineering, Dalian University of Technology
来源：
Transactions of Nonferrous Metals Society of China (English Edition) | 2010年 / 20卷 / SUPPL. 2期
基金：
中国国家自然科学基金;
关键词：
mechanical property; Mg-Zn-Cu-Zr alloy; microstructure; yttrium;
D O I：
10.1016/S1003-6326(10)60497-9
中图分类号：
学科分类号：
摘要：
The effects of yttrium addition on microstructure and mechanical properties of as-cast Mg-6Zn-3Cu-0.6Zr-xY (x=0, 0.5, 1.0, 1.5 and 2.0, mass fraction, %) (ZCK630+xY for short in this study) alloys were investigated by means of OM, XRD and SEM. The results show that the average grain size of Mg-Zn-Cu-Zr magnesium alloy is effectively reduced (from 57 μm to 39 μm) by Y addition. The analysis of XRD indicates the existence of I-phase (Mg3Zn 6Y) and W-phase (Mg3Zn3Y2) in ZCK630 alloys with Y addition. The ultimate tensile strength of ZCK630 alloys is significantly deteriorated with increasing Y addition, which is possibly related to the continuous networks of intergranular phases and the increase of W-phase. © 2010 The Nonferrous Metals Society of China.
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页码：s357 / s360
页数：3
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