Deformation characteristics at room temperature under biaxial tensile stress in textured AZ31 Mg alloy sheets

被引：120

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：

ACTA MATERIALIA | 2009年 / 57卷 / 05期

关键词：

Magnesium alloy; Mechanical properties; Stretch formability; Texture; Twinning; GRAINED MAGNESIUM ALLOYS; MECHANICAL-PROPERTIES; ELEVATED-TEMPERATURE; STRETCH FORMABILITY; ZN ALLOY; ANISOTROPY; FRACTURE; TWINS; MICROSTRUCTURES; DUCTILITY;

D O I：

10.1016/j.actamat.2008.11.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tensile and stretch-forming tests were conducted at room temperature on rolled AZ31 Mg alloy sheets with different grain sizes, and deformation behavior under biaxial tensile stress was investigated from the viewpoint of the effects of grain size with the aim of improving stretch formability. The elongation to failure at room temperature increased with decreasing grain size; in contrast, stretch formability increased with increasing grain size. Because the (0002) basal planes were intensively distributed parallel to the RD-TD plane in the rolled Mg alloy, the lattice rotation by the twins (such as {10 (1) over bar1} twin) played a critical role in deformation under biaxial tensile stress, inducing strain in the thickness direction. This resulted in the grain size dependence of stretch formability because the twin formation was enhanced by grain coarsening. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1476 / 1485

页数：10