Dynamic recrystallization mechanism and near-isotropic mechanical properties of WE43 magnesium alloy sheets rolled at different temperatures

被引：0

作者：

Li, Qiankun ^{[1
,2
]}

Yan, Hong ^{[1
]}

Liu, Honghui ^{[3
]}

Chen, Rongshi ^{[1
]}

机构：

[1] Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang,110016, China

[2] School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang,110016, China

[3] Avic Harbin Dongan Engine (group) Corporation Ltd., Heilongjiang, Harbin,150066, China

来源：

Materials Characterization | 2022年 / 193卷

基金：

中国国家自然科学基金;

关键词：

Backscattering - Dynamic recrystallization - Dynamics - Grain boundaries - Hot rolling - Magnesium printing plates - Plastic deformation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The dynamic recrystallization (DRX) behavior and mechanical properties of WE43 magnesium alloy during hot rolling rather than hot compression at 400–500 °C were systematically investigated by electron backscattering diffraction (EBSD) analysis. At relatively low temperatures, such as 400 °C, the rolled sheets cracked, and no DRX grains were found, and twinning contributed more to the plastic deformation. However, when the rolling temperature was above 450 °C, the alloy exhibited an excellent rolling ability, and slip dominated the plastic deformation. In parallel, the recrystallization mechanism involved continuous dynamic recrystallization (CDRX), where grains nucleated along the original grain boundaries and geometrically necessary dislocations (GNDs) occurred within the parent grains. In addition, a few twin-induced recrystallization grains were observed in the early stage of the rolling process at 500 °C. Rolled sheets at suitable temperatures have similar strength and fracture elongation and do not exhibit obvious anisotropy. This can be attributable to the random orientation of the DRX grains and similar Schmid factor (SF) values of different loading directions at different rolling temperatures. © 2022

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