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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：德国汉诺威大学
学位：博士
所在单位：力学与航空航天学院
学科：工程力学. 计算力学. 生物与纳米力学
电子邮箱：zhanghw@dlut.edu.cn
Roles of grain boundary and dislocations at different deformation stages of nanocrystalline copper under tension
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论文类型：期刊论文
发表时间：2009-01-26
发表刊物：PHYSICS LETTERS A
收录刊物：SCIE
卷号：373
期号：5
页面范围：570-574
ISSN号：0375-9601
关键字：Nanocrystalline copper; Molecular dynamics simulation; Plastic deformation; Dislocation; Grain growth
摘要：The plastic deformation of nanocrystalline copper subjected to tension has been studied using molecular dynamics simulation. The results show that, in the initial stage, the deformation is mainly boundary-mediated in small grains; while in the late stage, the deformation is accommodated by dislocations in large grains. It is also found that the stress-assisted grain growth occurs owing to atomic diffusion and grain boundary migration. These results are consistent with recent experimental observations. (c) 2008 Elsevier B.V. All rights reserved.