Cyclic response of copper single crystal micro-beams

被引：93

作者：

Kiener, D. ^{[1
]}

Motz, C. ^{[1
]}

Grosinger, W. ^{[1
]}

Weygand, D. ^{[2
]}

Pippan, R. ^{[1
]}

机构：

[1] Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria

[2] Univ Karlsruhe TH, IZBS, D-76131 Karlsruhe, Germany

来源：

SCRIPTA MATERIALIA | 2010年 / 63卷 / 05期

关键词：

Low cycle fatigue (LCF); Micro-bending; Single crystal copper; Three-dimensional discrete dislocation simulation (3D-DDD); MECHANICAL-PROPERTIES; BEHAVIOR; INDENTATION; PLASTICITY; HARDNESS;

D O I：

10.1016/j.scriptamat.2010.05.014

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A new technique to perform in situ miniaturized bending fatigue experiments was applied to single crystal copper beams. Pronounced monotonic hardening and an increasing Bauschinger effect were observed with increasing normalized displacement Remarkably, no cyclic hardening or softening was observed Three-dimensional discrete dislocation dynamics simulations support these results and point out the importance of dislocation pile-ups and local hardening mechanisms. These lead to local strain redistribution and the activation of new glide planes as observed experimentally (C) 2010 Acta Materialia Inc Published by Elsevier Ltd All rights reserved

引用

页码：500 / 503

页数：4

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