The strain gradient effects in micro-indentation hardness experiments

Z. Xue*, Y. Huang, H. Gao, W. D. Nix

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Micro-indentation experiments have shown very strong size dependence of the indentation hardness, a phenomenon that cannot be explained by classical plasticity theories. A theory of mechanism-based strain gradient (MSG) plasticity has been developed based on the Taylor model in dislocation theories, and is intended for materials and structures whose dimension controlling plastic deformation falls roughly between 0.1 to 10 microns. The MSG plasticity theory is used in the present study to investigate the size effects observed in micro-indentation experiments. It is shown that the theory can indeed reproduce micro-indentation experimental data, thus providing an important self-consistent check of the MSG plasticity theory.

Original languageEnglish (US)
Pages (from-to)53-58
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume578
StatePublished - Dec 1 2000

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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