An indentation fatigue strength law

Baoxing XU, Akio YONEZU, Xi CHEN*

*Corresponding author for this work

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

16 Citations (Scopus)

Abstract

Indentation fatigue, where a cyclic load is applied on the sample via an indenter, emerges as an alternative approach for measuring the fatigue properties of materials. We have carried out indentation fatigue tests on a poly(vinyl chloride) (PVC) bulk material, as well as on TiN and NiP films/coatings deposited on SUS304 steel substrates, and demonstrate that a simple power-law relationship can be established between the indentation load amplitude and number of cycles to failure. Such a law is very similar to the conventional fatigue strength law obtained from uniaxial tests. The agreement between the fatigue stress exponents obtained by uniaxial and indentation fatigue tests suggests the potential applicability of the indentation fatigue technique for extracting the fatigue properties of materials.

Original languageEnglish
Pages (from-to)313-322
Number of pages10
JournalPhilosophical Magazine Letters
Volume90
Issue number5
DOIs
Publication statusPublished - May 2010
Externally publishedYes

Bibliographical note

Acknowledgements:
The work is supported by National Science Foundation (NSF Grant No. CMMI-0643726), by World Class University (WCU) program through the National Research Foundation of Korea (Grant No. R32-2008-000-20042-0), and by National Natural Science Foundation of China (NSFC Grant No. 50928601).

Keywords

  • Acoustic emission
  • Failure
  • Fatigue strength
  • Indentation fatigue
  • PVC
  • Thin films

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