On the importance of sample compliance in uniaxial microtesting

被引：78

作者：

Kiener, D. ^{[1
,2
]}

Grosinger, W. ^{[1
]}

Dehm, G. ^{[1
,3
]}

机构：

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

[2] Mat Ctr Leoben, A-8700 Leoben, Austria

[3] Univ Leoben, Dept Mat Phys, A-8700 Leoben, Austria

来源：

SCRIPTA MATERIALIA | 2009年 / 60卷 / 03期

关键词：

Copper; Materials with reduced dimensions; Size effects; Plastic deformation; STRENGTH; DEFORMATION; COMPRESSION; COPPER; PLASTICITY; SIMULATIONS; BEHAVIOR; TENSION;

D O I：

10.1016/j.scriptamat.2008.09.024

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

Recent investigations have reported significantly higher flow stresses for microcompression compared to microtensile testing. To clarify this point a load reversal test was performed on a microtensile specimen and equal flow stresses in tension and compression were observed. In contrast, if the lateral sample compliance constrains the deformation, microcompression testing overestimates the flow stresses. Additional contributions to the measured flow stresses stem from the aspect ratio of the sample and dislocation pile-ups. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：148 / 151

页数：4

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