Twinning effects on the hot deformation behavior of AZ31 Mg alloy

被引：64
作者：
Chen, Yuanli
Jin, Li [1 ]
Dong, Jie
Zhang, Zhenyan
Wang, Fenghua
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2016年 / 118卷
基金：
中国国家自然科学基金;
关键词：
Magnesium alloy; Twinning; Dynamic recrystallization; Microstructure; Texture; DYNAMIC RECRYSTALLIZATION BEHAVIOR; MAGNESIUM ALLOY; MECHANICAL-PROPERTIES; EVOLUTION; MICROSTRUCTURE; TEMPERATURE; TENSION;
D O I：
10.1016/j.matchar.2016.06.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Twinning plays an important role in the dynamic recrystallization (DRX) of AZ31 magnesium alloy. To evaluate the effect and the underlying mechanism of twinning, we studied the microstructure and texture evolution of pre-compressed extension twin (ET) and contraction twin (CT) samples under uniaxial compression at 250 degrees C at a strain rate of 0.001/s. The results suggested that favorable nucleation sites for DRX grains were contraction or double twin boundaries of CT sample rather than extension twin boundaries of ET sample. Based on the different textures in ET and CT samples after hot deformation, we demonstrate that the pre-existing twins can greatly affect the grain orientations of DRX grains such as in the case of CT sample where DRX grains exhibited new orientations after hot deformation. (C) 2016 Elsevier Inc. All rights reserved.
引用
收藏
页码：363 / 369
页数：7
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