Fabrication and characterization of micro dent array produced by laser shock peening on aluminum surfaces

R. Caslaru, M. P. Sealy, Y. B. Guo, S. C. Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

26 Scopus citations

Abstract

Surface micro dents may act as lubricant reservoirs to reduce friction and wear in sliding and rolling contact applications. Surface patterning has become a valuable technique for fabricating micro dents. Alternative methods such as micromachining present obvious limitations in comparison with laser shock peening (LSP). In this paper, the use of LSP along with an automatic X-Y table proves to be an attractive and reliable method for producing micro dent arrays with enhanced surface integrity and free of cracks. Surface topography and microhardness of the fabricated micro dent arrays on polished aluminum 6061-T6 have been characterized. It was found that low laser power produced deep micro dents. The hardness increased approximately 55% from the bulk material due to LSP induced strain and strain rate hardening.

Original languageEnglish (US)
Title of host publicationTransactions of the North American Manufacturing Research Institution of SME - 37th Annual North American Manufacturing Research Conference, NAMRC 37
Pages159-166
Number of pages8
StatePublished - 2009
Event37th Annual North American Manufacturing Research Conference, NAMRC 37 - Greenville, SC, United States
Duration: May 19 2009May 22 2009

Publication series

NameTransactions of the North American Manufacturing Research Institution of SME
Volume37
ISSN (Print)1047-3025

Conference

Conference37th Annual North American Manufacturing Research Conference, NAMRC 37
CountryUnited States
CityGreenville, SC
Period5/19/095/22/09

Keywords

  • Laser shock peening
  • Micro dent array
  • Surface integrity
  • Surface texturing

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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