Fabrication and tribological functions of microdent arrays on Ti-6Al-4V surface by laser shock peening

R. Caslaru, M. P. Sealy, Y. B. Guo, X. T. Wei

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Surface patterning has become a valuable technique for fabricating microdents, which may act as lubricant reservoirs to reduce friction and wear in sliding and rolling contact applications. In this paper, the use of laser shock peening (LSP) along with an automatic X-Y table proves to be an attractive and reliable method for producing microdent arrays with enhanced surface integrity. Surface topography and profiles of the fabricated microdent arrays on polished Ti-6Al-4V have been characterized. The effect of dent arrays with different density on friction reduction at low and high viscosity lubrication was investigated. An acoustic emission (AE) sensor was used to online monitor friction and wear processes. It was found that a surface with 10% dent density provides better effect in reducing coefficient of friction (CoF) than those of smooth surface and a surface with 20% dent density. It was shown that there is a strong correlation between AE energy signals and wear rate.

Original languageEnglish (US)
Article number051020
JournalJournal of Manufacturing Science and Engineering
Issue number5
StatePublished - Oct 2014
Externally publishedYes


  • acoustic emission
  • laser shock peening
  • surface patterning
  • tribology

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering


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