Twinning behavior and deformation mechanisms of extruded AZ31 Mg alloy

被引：204

作者：

Chino, Yasumasa ^{[1
]}

Kimura, Katsuya ^{[2
]}

Mabuchi, Mamoru ^{[2
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Mat Res Inst Sustainable Dev, Moriyama Ku, Nagoya, Aichi 4638560, Japan

[2] Kyoto Univ, Grad Sch Energy Sci, Dept Energy Sci & Technol, Sakyo Ku, Kyoto 6068501, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 486卷 / 1-2期

关键词：

magnesium; mechanical properties; twin; texture; grain size;

D O I：

10.1016/j.msea.2007.09.058

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Complicated deformation mechanisms such as twinning, non-basal slips and grain boundary sliding besides the basal slip occur at room temperature for Mg and its alloys. The roles of these mechanisms should be understood from the viewpoint of the homogeneous deformation of a polycrystalline and the relaxation of stress concentrations at the grain boundaries. In the present paper, twinning behavior of AZ31 Mg alloy extrusions with different texture intensity and grain sizes was investigated. Twinning played a vital role in a coarse-grained Mg, not in a fine-grained Mg. Thus, the deformation behavior was drastically changed by grain refinement. Based on the results, the deformation mechanisms are discussed from the viewpoint of the deformation and relaxation mechanisms. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：481 / 488

页数：8

共 34 条

[1] Mg sheet metal forming: Lessons learned from deep drawing Li and Y solid-solution alloys [J].