Effects of Zn/Y ratio on microstructure and mechanical properties of Mg-Zn-Y alloys

被引：263
|
作者：
Lee, JY
Do, HK
Lim, HK
Kim, DH
机构：
[1] Yonsei Univ, Dept Met Engn, Ctr Noncrystalline Mat, Seoul 120749, South Korea
[2] Aero Technol Res Inst, Donggu 701040, Daegu, South Korea
来源：
MATERIALS LETTERS | 2005年 / 59卷 / 29-30期
关键词：
Mg-Zn-Y alloys; icosahedral phase (I-phase); ratio of Zn/Y;
D O I：
10.1016/j.matlet.2005.06.052
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microstructures and mechanical properties of Mg-Zn-Y alloys containing icosahedral phase (I-phase) as a secondary solidification phase have been investigated in the composition range where the total solute content (Zn and Y) is less than 10 wt.%. The optimum Zn/Y ratio for the formation of two-phase microstructure consisting of alpha-Mg and I-phase is 5 similar to 7. The strength increases with increasing total solute content (Zn and Y), i.e. with increasing volume fraction of I-phase. In particular, the alloys containing I-phase exhibit high elongation to failure, >25%, which is ascribed to the low interfacial energy between the I-phase particle and surrounding alpha-Mg crystalline matrix. (C) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：3801 / 3805
页数：5
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