The stability of Lomer-Cottrell jogs in nanopillars

被引：37

作者：

Weinberger, Christopher R. ^{[1
]}

Cai, Wei ^{[1
,2
]}

机构：

[1] Sandia Natl Labs, Albuquerque, NM 87185 USA

[2] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

来源：

SCRIPTA MATERIALIA | 2011年 / 64卷 / 06期

基金：

美国国家科学基金会;

关键词：

Dislocations; Micropillar; Jog; Plastic Deformation; TRANSMISSION ELECTRON-MICROSCOPY; SIMULATIONS; PLASTICITY;

D O I：

10.1016/j.scriptamat.2010.11.037

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Single arm spiral sources, or truncated Frank Read sources, have been used frequently to interpret the size dependent plasticity in micropillars. The basis for these sources is strong pinning points which have been proposed to exist based on immobile Lomer-Cottrell jogs. Here, we show, using molecular dynamics of face-centered cubic nanopillars, that Lomer-Cottrell jogs are not as immobile as initially thought and that they do not provide strong pinning points for single arm sources. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：529 / 532

页数：4

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