Journal
SCRIPTA MATERIALIA
Volume 52, Issue 11, Pages 1093-1097Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2005.02.009
Keywords
nanoindentation; hardness; ultrafine-grained microstructure; finite element analysis
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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.
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