陈国清

个人信息Personal Information

教授

博士生导师

硕士生导师

主要任职:材料科学与工程学院副院长

性别:男

毕业院校:哈尔滨工业大学

学位:博士

所在单位:材料科学与工程学院

办公地点:铸造中心208

联系方式:0411-84707970

电子邮箱:gqchen@dlut.edu.cn

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Multi-pass large strain rolling of as-cast AZ31 magnesium alloy

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论文类型:期刊论文

发表时间:2016-12-11

发表刊物:MATERIALS SCIENCE AND TECHNOLOGY

收录刊物:SCIE、EI、Scopus

卷号:32

期号:18

页面范围:1869-1876

ISSN号:0267-0836

关键字:Multi-pass; Dynamic recrystallisation; Grain refinement; Fracture mode; Large strain rolling

摘要:As-cast AZ31 magnesium alloy subjected to multi-pass large strain rolling was investigated. A successive rolling process up to three passes was carried out at 370 degrees C with a pass reduction of 30%. Deformation microstructure characteristics prove that the dynamic recrystallisation (DRX) mode changed with the increase of rolling passes. In the first pass, DRX related to twinning played a dominant role. But in the third pass, DRX grains mainly appeared around the pre-existing grain boundaries. The ultimate strength and elongation of rolled sheets after three passes rolling are enhanced by 37 and 39%, respectively, compared to the as-cast alloy. Meanwhile, the tensile fracture mode was ductile fracture which was different from the ductile-brittle fracture of as-cast.