Journal
SCRIPTA MATERIALIA
Volume 59, Issue 5, Pages 518-521Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.04.039
Keywords
nominal hardness; microindentation; size effects
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For the sharp indentation of soft metals, we first reveal a simple relation between the nominal hardness, H-n, and the flow stress, sigma(r), i.e. H-n = 4.4 sigma(r). Further, using the relation proposed herein instead of the well-known Tabor's relation and the analysis performed by Nix/Gao on the geometrically necessary dislocations, a simple indentation nominal hardness-depth relation at the microscale is obtained. The model agrees well with the experiment data in the, literature and the simulation based on a strain gradient theory. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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