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

页码：775 / 778

页数：4

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