文献类型：期刊文献

英文题名：Dislocation-assisted grain growth in nanocrystalline copper under large deformation

作者：Ma, Xin Ling[1];Yang, Wei[2]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Zhejiang Univ, Sch Aeronaut & Astronaut, Hangzhou 310058, Zhejiang, Peoples R China

年份：2008

卷号：59

期号：7

起止页码：792

外文期刊名：SCRIPTA MATERIALIA

收录：;EI(收录号：20083111412327);WOS:【SCI-EXPANDED(收录号:WOS:000258968300031)】；

基金：Computation of this work was supported by the Institute of Applied Physics and Computational Mathematics, as carried out in its Milky-Way super parallel computer.

语种：英文

外文关键词：dislocation; grain growth; molecular dynamics; nanocrystalline; large deformation

摘要：Dislocation plasticity conventionally induces textures in polycrystalline metals after a large deformation. We used parallel molecular dynamics to simulate the plastic deformation of nanocrystalline copper to an isochoric stretch up to 100% logarithmic strain. We found that the movements of partial dislocations that dominate the deformation process do not lead to texture formation. The grain size distribution becomes extremely inhomogeneous. By observing the structural evolution, we demonstrate that grain growth assisted by partial dislocations suppresses the texture formation. Crown Copyright (c) 2008 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. All rights reserved.