Effects of prior compression on ductility and yielding behaviour in extruded magnesium alloy AZ31

被引：8
作者：
He, J. J. [1 ,2 ]
Liu, T. M. [1 ,2 ]
Chen, H. B. [1 ,2 ]
Lu, L. W. [3 ]
Pan, F. S. [1 ,2 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Mg Alloys, Chongqing 400044, Peoples R China
[3] Hunan Univ Sci & Technol, Coll Electromech Engn, Xiangtan 412007, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2014年 / 30卷 / 12期
关键词：
Magnesium alloys; Twinning; Texture; Plastic deformation; NUCLEATION; ASYMMETRY;
D O I：
10.1179/026708313X13853742547939
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present paper, the effects of precompression along extrusion direction (ED) on subsequent compression perpendicular to ED were investigated in an extruded magnesium alloy AZ31. The results showed that the yield stress under compression perpendicular to ED increased if there was precompression along ED. The evolution of deformation mechanism was responsible for increase in yield stress because plastic deformation was dominated by both basal slip and {1012} twinning under compression perpendicular to ED in samples without prestrain, but basal slip was difficult to be activated and {10-12} twinning dominated deformation in samples with precompression. However, because basal slip had no obvious contribution to plastic deformation, the ductility decreased if there was precompression along ED.
引用
收藏
页码：1488 / 1494
页数：7
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