Effect of grain size on the tensile deformation of wrought Mg-MM-Al-Zn-Sn alloy

被引：15
|
作者：
Lim, Hyun Kyu [1 ]
Kim, Do Hyung [1 ]
Lee, Ju Youn [1 ]
Kim, Won Tae [2 ]
Kim, Do Hyang [1 ]
机构：
[1] Yonsei Univ, Dept Met Eng, Ctr Noncrystalline Mat, Seoul 120749, South Korea
[2] Cheongju Univ, Div Appl Sci, Cheongju, Chongbuk, South Korea
来源：
MATERIALS LETTERS | 2008年 / 62卷 / 16期
关键词：
wrought magnesium alloy; tensile deformation; Hall-Petch relationship; grain boundary sliding;
D O I：
10.1016/j.matlet.2007.11.095
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of grain size on the tensile deformation of Mg-MM-Al-Zn-Sn (EAZT211) alloy sheet has been investigated. Specimens with grain size varying from similar to 10 to similar to 20 mu m have been obtained by altering the annealing conditions after rolling. The yield strength of EAZT211 sheet exhibits grain size dependence according to Hall-Petch relationship from room temperature to 200 degrees C. Occurrence of yield phenomenon and decrease of Hall-Petch slope (k) with increasing strain suggest that non-basal slip system operates during deformation. In addition, deformation mechanism changes from slip mechanism to grain boundary sliding mechanism at similar to 150 degrees C. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：2271 / 2274
页数：4
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