Indentation size effect in metallic materials:: Correcting for the size of the plastic zone

被引：327
|
作者：
Durst, K [1 ]
Backes, B [1 ]
Göken, M [1 ]
机构：
[1] Univ Erlangen Nurnberg, Dept Mat Sci & Engn, D-91058 Erlangen, Germany
来源：
SCRIPTA MATERIALIA | 2005年 / 52卷 / 11期
关键词：
nanoindentation; hardness; ultrafine-grained microstructure; finite element analysis;
D O I：
10.1016/j.scriptamat.2005.02.009
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A correction method is proposed for the Nix/Gao model of the indentation size effect, assuming that the geometrically necessary dislocations are stored within the plastically deformed volume, whose radius is given, depending on the material, by a factor times the contact radius. Using this volume for calculating the depth dependence of hardness and the characteristic indentation length scale h(*) a good agreement with experiments is found for many metallic materials. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1093 / 1097
页数：5
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