Acoustic emission study of the mechanical anisotropy of the extruded AZ31 alloy

被引：14
|
作者：
Dobron, Patrik [1 ,2 ]
Chmelik, Frantisek [1 ]
Bohlen, Jan [2 ]
Hantzsche, Kerstin [2 ]
Letzig, Dietmar [2 ]
Kainer, Karl Ulrich [2 ]
机构：
[1] Charles Univ Prague, Dept Phys Mat, Prague 12116 2, Czech Republic
[2] GKSS Forschungszentrum Geesthacht GmbH, Magnesium Innovat Ctr, D-2054 Geesthacht, Germany
来源：
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2009年 / 100卷 / 06期
关键词：
Acoustic emission; Magnesium alloy AZ31; Extrusion; Mechanical anisotropy; MG; DEFORMATION; PLASTICITY; BEHAVIOR; STRAIN;
D O I：
10.3139/146.110115
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The mechanical anisotropy behaviour of the extruded AZ31 magnesium alloy was investigated by in-situ measurements of acoustic emission. Specimens taken in the extrusion direction were uniaxially loaded in tension and compression at room temperature. The acoustic emission count rates were correlated with stress-strain curves and their values show local maxima at the yield point, which is linked with cooperative dislocation processes and/or with the occurrence of deformation twins, especially in compression tests. During compression tests, another acoustic emission maximum occurs after the yield point which indicates the activation of further deformation mechanisms. In this paper the acoustic emission results are presented and discussed in terms of texture evolution during plastic deformation.
引用
收藏
页码：888 / 891
页数：4
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