Coupled grain boundary motion in a nanocrystalline grain boundary network

被引：64

作者：

Velasco, M. ^{[1
,2
]}

Van Swygenhoven, H. ^{[1
,2
]}

Brandl, C. ^{[3
]}

机构：

[1] Paul Scherrer Inst Mat Sci & Simulat, CH-5232 Villigen, Switzerland

[2] Ecole Polytech Fed Lausanne, Inst Mat IMX, CH-1015 Lausanne, Switzerland

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

SCRIPTA MATERIALIA | 2011年 / 65卷 / 02期

关键词：

Molecular dynamics; Dislocations; Plasticity; Nanocrystalline; Grain boundary; MIGRATION; AL;

D O I：

10.1016/j.scriptamat.2011.03.039

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Coupled grain boundary motion was simulated in a three-dimensional nanocrystalline Al grain boundary network using molecular dynamics. It is shown that, in spite of the triple junction constraints, a symmetrical Sigma 75 tilt boundary can migrate during the microplastic regime with the same coupling factor as when simulated in a bicrystal configuration. After reaching the full plastic regime, dislocations start coming into play, changing the grain boundary structure and hindering further coupled motion. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：151 / 154

页数：4

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