Use of scaling functions to determine mechanical properties of thin coatings from microindentation tests

J. P. Bardet, I. Vardoulakis

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

The indentation of elastic-plastic coatings deposited on elastic substrates is studied in this work. The functional expressions that relate the load-indentation behaviour to coating and substrate material properties are derived using dimensional analysis in conjunction with finite element simulations. Based on these scaling functions, a method is proposed to determine the coating Young's modulus, yield strength and strain hardening properties from the micro-indentation tests. A method to obtain improved estimates of the material hardness is also discussed. While the analyses are based on a conical (i.e. Rockwell) indenter, the indenter angle used in the simulations was selected so that the results can also be used to extract mechanical properties from measurements using the pyramidal indenters such as Vickers and Berkovich types.

Original languageEnglish (US)
Pages (from-to)335-351
Number of pages17
JournalInternational Journal of Solids and Structures
Volume38
Issue number2
DOIs
StatePublished - Jan 11 2001
Externally publishedYes

Keywords

  • Finite element simulation
  • Indentation
  • Mechanical properties of coating

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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