Portevin-Le Châtelier type plastic instabilities in depth sensing macro-indentation

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Depth-sensing indentation at constant loading rate was applied to investigate the Portevin-Le Châtelier effect. Comparison of the different testing methods was achieved using representative strain and stress quantities. The depth of the dynamic strain ageing shows a good coincidence for Vickers and conical indentations, and for the large strain region of the tension tests. Tests with cylindrical indenters and tension experiments show a transient and a stationary behaviour for small and for large strains, respectively. The transient part can be interpreted by taking into account the free-flight time of dislocations in the Kubin-Estrin model.

Original languageEnglish
Pages (from-to)255-260
Number of pages6
JournalMaterials Science and Engineering A
Volume325
Issue number1-2
DOIs
Publication statusPublished - Feb 28 2002

Keywords

  • Depth-sensing indentation
  • Load control
  • Portevin-Le Châtelier effect

ASJC Scopus subject areas

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

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