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Indexed by:期刊论文

Date of Publication:2016-09-15

Journal:MATERIALS & DESIGN

Included Journals:SCIE、EI、Scopus

Volume:106

Page Number:313-320

ISSN No.:0264-1275

Key Words:Molecular dynamics; Nanotwinning; Nanotwinned surface; Transmission electron microscopy; Temary nickel alloy

Abstract: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.