Discrete dislocation simulations of the plasticity of micro-pillars under uniaxial loading

被引：99

作者：

Senger, J. ^{[1
]}

Weygand, D. ^{[1
]}

Gumbsch, P. ^{[1
,2
]}

Kraft, O. ^{[1
,3
]}

机构：

[1] Univ Karlsruhe, IZBS, D-76131 Karlsruhe, Germany

[2] Fraunhofer Inst Werkstoffmech, IWM, D-79108 Freiburg, Germany

[3] Forschungszentrum Karlsruhe, Inst Mat Forsch 2, Karlsruhe, Germany

来源：

SCRIPTA MATERIALIA | 2008年 / 58卷 / 07期

关键词：

dislocation dynamics; simulation; tension test; size effect;

D O I：

10.1016/j.scriptamat.2007.11.031

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Recent experiments have shown an unexpected strong size effect in uniaxial compression tests of metallic micro-pillars, such as the flow stress increases with decreasing pillar diameter. In our work, we apply three-dimensional discrete dislocation dynamics (DDD) to simulate these experiments on a mesoscopic level. Although we simulate systems with a constant source size and density, the simulations show a size effect related to size-dependent differences in details of the dislocation behavior in excellent agreement with the experiments. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：587 / 590

页数：4

共 27 条

[1] Enabling strain hardening simulations with dislocation dynamics [J].