Influence of the grain size on the strain rate sensitivity in an Mg-Al-Zn alloy at moderate temperatures

被引：60
|
作者：
del Valle, J. A. [1 ]
Ruano, O. A. [1 ]
机构：
[1] CSIC, CENIM, Dept Met Phys, E-28040 Madrid, Spain
来源：
SCRIPTA MATERIALIA | 2006年 / 55卷 / 09期
关键词：
magnesium alloys; strain rate sensitivity; work hardening; thermally activated processes;
D O I：
10.1016/j.scriptamat.2006.07.013
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of grain size on the strain rate sensitivity (SRS) of the magnesium alloy Mg-3 wt.%Al-0.75 wt.%Zn has been investigated. It is shown that the SRS increases strongly for decreasing grain size below 15 pm. There is a close correlation between the SRS and the work hardening behavior. The current models are not capable of explaining this grain size dependence. The experimental results give a clue about an increasing contribution of grain boundary sliding to deformation. (c) 2006 Acta Materialia, Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：775 / 778
页数：4
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