Strain-hardening behaviour of AZ31 magnesium alloys

被引：15
|
作者：
Balik, Jaroslav [1 ]
Lukac, Pavel [1 ]
Drozd, Zdenek [1 ]
Kuzel, Radomir [1 ]
机构：
[1] Charles Univ Prague, Fac Math & Phys, Dept Phys Mat, CR-12116 Prague 2, Czech Republic
来源：
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2009年 / 100卷 / 03期
关键词：
Work hardening; Dislocation reaction; Predeformation; Polycrystals; ANISOTROPY; EVOLUTION; TEXTURE;
D O I：
10.3139/146.110042
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The in-plane tensile behaviour of rolled sheets of the magnesium alloy AZ31 was investigated in both an H24 state and an aged state. Whereas the very high initial strain-hardening rate decreases monotonically with strain for the H24 samples, the annealed structure exhibits a striking increase in the strain-hardening rate. To explain this phenomenon, the occurrence of sessile dislocations associated with a secondary (pyramidal) slip is proposed. The absence of increasing hardening for the H24 state is supposed to be related to higher yield stresses (predeformations) within the grains of the polycrystalline aggregate.
引用
收藏
页码：322 / 325
页数：4
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