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论文类型：期刊论文

发表时间：2016-09-15

发表刊物：MATERIALS & DESIGN

收录刊物：SCIE、EI、Scopus

卷号：106

页面范围：313-320

ISSN号：0264-1275

关键字：Molecular dynamics; Nanotwinning; Nanotwinned surface; Transmission electron microscopy; Temary nickel alloy

摘要：Deformation nanotwinning is performed using molecular dynamics (MD) on a single crystal in a ternary nickel(Ni) alloy. Generalized embedded-atom method (EAM) potential functions are obtained for the ternary Ni alloy. The critical twinning stress is 4.48 GPa, calculated by the MD simulations. Detwinning, restoring and regenerating of nanotwins take place during the unloading process, contributing to the remaining of the ductility. According to the MD simulations, a novel approach is proposed to fabricating a nanotwinned surface using nano indentation at room temperature. This is different from previous reports, in which high temperature, high pressure or chemical regents are employed. (C) 2016 Elsevier Ltd. All rights reserved.