Reducing the tension-compression yield asymmetry in a Mg-8Al-0.5Zn alloy via precipitation

被引：212
作者：
Jain, J. [1 ]
Poole, W. J. [1 ]
Sinclair, C. W. [1 ]
Gharghouri, M. A. [2 ]
机构：
[1] Univ British Columbia, Dept Mat Engn, Vancouver, BC V6T 1Z4, Canada
[2] Chalk River Labs, Natl Res Council Canada, Canadian Neutron Beam Ctr, Chalk River, ON K0J 1J0, Canada
来源：
SCRIPTA MATERIALIA | 2010年 / 62卷 / 05期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Yield asymmetry; Magnesium alloys; Precipitates; Neutron diffraction; Twinning; DEFORMATION TWINS; GROWTH;
D O I：
10.1016/j.scriptamat.2009.11.024
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Tension-compression asymmetry in Mg-8Al-0.5Zn alloys has been studied as a function of precipitation state. It has been shown that the presence of precipitates significantly reduces yield asymmetry compared with solution treated material. This reduction in asymmetry was attributed to reduced rates of twinning in the presence Of Mg17Al12 precipitates. This has been confirmed by texture and microstructure analyses, which show a reduction in the scale and volume fraction of twins in aged and solution treated samples examined at equivalent levels of strain. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：301 / 304
页数：4
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