An instrumented indentation method for young's modulus measurement with accuracy estimation

D. Ma, C. W. Ong, T. Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)

Abstract

The relationships between indentation responses and Young's modulus of an indented material were investigated by employing dimensional analysis and finite element method. Three representative tip bluntness geometries were introduced to describe the shape of a real Berkovich indenter. It was demonstrated that for each of these bluntness geometries, a set of approximate indentation relationships correlating the ratio of nominal hardness/reduced Young's modulus Hn/Erand the ratio of elastic work/total work We/W can be derived. Consequently, a method for Young's modulus measurement combined with its accuracy estimation was established on basis of these relationships. The effectiveness of this approach was verified by performing nanoindentation tests on S45C carbon steel and 6061 aluminum alloy and microindentation tests on aluminum single crystal, GCr15 bearing steel and fused silica.
Original languageEnglish
Pages (from-to)719-729
Number of pages11
JournalExperimental Mechanics
Volume49
Issue number5
DOIs
Publication statusPublished - 1 Jan 2009

Keywords

  • Accuracy
  • Berkovich indenter
  • Finite element analysis
  • Instrumented indentation
  • Young's modulus

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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