Correlation between the flow stress and the nominal indentation hardness of soft metals

Yanping CAO*, Zhenyu XUE, Xi CHEN*, Dierk RAABE

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

26 Citations (Scopus)

Abstract

For the sharp indentation of soft metals, we first reveal a simple relation between the nominal hardness, Hn, and the flow stress, σr, i.e. Hn = 4.4σr. 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.

Original languageEnglish
Pages (from-to)518-521
Number of pages4
JournalScripta Materialia
Volume59
Issue number5
DOIs
Publication statusPublished - Sept 2008
Externally publishedYes

Keywords

  • Microindentation
  • Nominal hardness
  • Size effects

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