Mechanical behavior and microstructure evolution for extruded AZ31 sheet under side direction strain

被引：13
作者：
Yang, Qingshan [1 ,2 ]
Jiang, Bin [2 ]
Song, Bo [3 ]
Yu, Daliang [1 ]
Chai, Sensen [1 ]
Zhang, Jianyue [4 ]
Pan, Fusheng [2 ]
机构：
[1] Chongqing Univ Sci & Technol, Sch Met & Mat Engn, Chongqing 401331, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
[3] Southwest Univ, Sch Mat & Energy, Chongqing 400715, Peoples R China
[4] Purdue Univ, Sch Engn Technol, W Lafayette, IN 47907 USA
来源：
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL | 2020年 / 30卷 / 02期
基金：
中国国家自然科学基金;
关键词：
AZ31 Mg alloy; Microstructure; Texture; Extrusion; Side direction strain; MAGNESIUM ALLOY SHEET; TEXTURE; DEFORMATION; STRENGTH; FORMABILITY; DUCTILITY; TENSION; GD; ANISOTROPY; PLATE;
D O I：
10.1016/j.pnsc.2020.02.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
AZ31 magnesium alloy sheets were prepared by a conventional extrusion (CE) and a novel integrated extrusion with side direction strain (SE). The microstructure characterizations, crystallographic texture and mechanical property tests were carried out and compared between the extruded Mg alloy sheets processed by CE and SE. The results indicated that the SE sheets exhibited an excellent combination of strength and ductility. To reveal the side strain effect, the finite element model was employed to investigate the effective stress and strain behavior of the AZ31 magnesium alloy sheets during CE and SE processes. It was found that the SE process was effective in weakening the stress and strain concentration. This implied that it developed an additional side direction strain through the sheet thickness during the hot extrusion. Meanwhile, the side strain shear paths could promote the local accumulation of dynamically recrystallized grains and increase the random high-angle boundaries to achieve weak (0002) basal texture. Important factors including the side strain path and extrusion parameters need to be taken into account to understand the deformation mechanism and microstructure evolution.
引用
收藏
页码：270 / 277
页数：8
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