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Indexed by:会议论文

Date of Publication:2010-01-01

Included Journals:CPCI-S

Volume:1233

Page Number:818-+

Key Words:Molecular dynamics; Grain boundary; Mechanical behavior

Abstract:For materials at nano-scale, the influence of interfaces is amplified due to the increased fraction of atoms located at or near interfaces. The role of several kinds of defects (point vacancies, line vacancies and cracks) during the deformation of both Cu/Cu and Cu/Al interfaces, which are used as model systems of homogeneous and heterogeneous metal interfaces respectively, is explored using molecular dynamics simulations and the embedded-atom method. Some defect topologies are found to improve, instead of degrade, certain properties (e.g. fracture strain) of a bi-crystal interface system. In some cases of a defective interface, the nucleation of partial dislocations is observed.