Indenter Size Effect on the Incipient Plasticity of Al (001) Surface

摘要：

　　Indenter size effect on the incipient plasticity of Al (001) surface is studied by using the quasicontinuum simulation method.Two cylindrical indenters with the radii 2.5nm and 40nm are used to penetrate the surface respectively,and in displacement-control in steps of 0.02 nm.Results show that the plasticity under the small indenter is activated by discrete dislocation nucleation events,while the plasticity under the large indenter is dominated by a collective dislocation activity.Contact pressure calculations reveal that reversible incipient plasticity occurs under the small indenter,i.e.the plastically deformed surface can completely recover upon withdrawal of the indenter,while the incipient plasticity under the large indenter seems to be irreversible.

关键词： Multiscale simulation Size effect Incipient plasticity Nanoindentation

作者: Yufei Shao Dan Tang Jiuhui Li Xing Zhao

作者单位: Institute of Applied Physics and Technology, Liaoning Technical University,Huludao 125105, China College of Sciences, Liaoning University of Technology,JinZhou 121001, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 510-517

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）