Deformation behaviour of hot extruded Mg alloy AZ31 during compressive deformation

被引：24

作者：

He, J. J. ^{[1
]}

Liu, T. M. ^{[1
]}

Zhang, Y. ^{[1
]}

Xu, S. ^{[1
]}

Lu, L. W. ^{[1
]}

Tan, J. ^{[1
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 630044, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2013年 / 29卷 / 02期

关键词：

Magnesium alloys; Twinning; X-ray diffraction; MECHANICAL-BEHAVIOR; MAGNESIUM; TENSION;

D O I：

10.1179/1743284712Y.0000000114

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Deformation behaviour of a hot extruded Mg-3Al-1Zn alloy subjected to uniaxial compression at room temperature was investigated. Microstructure evolution showed that the amount of lenticular shaped extension twins increased with the increase in true strain when it was lower than similar to 4% but decreased when it was higher than similar to 4%. Previous studies indicated that detwinning occurred. However, we have demonstrated in the present paper that no detwinning occurred, but a process of twin growth and coalescence, leading to an analogous detwinning phenomenon observed in the optical micrographs because most of the matrixes were consumed. A strong texture evolution occurred in this process, and the reorientation produced by strong twinning was mainly responsible for strain hardening when compressed along the extrusion direction.

引用

页码：177 / 183

页数：7

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