Relieving micro-strain by introducing macro-strain in a polycrystalline metal surface by cavitation shotless peening

H. Soyama, N. Yamada

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Peening using cavitation impact is called "cavitation shotless peening CSP", since there is no requirement for shot in the process. Micro- and macro-strain of polycrystalline metal peened by CSP were evaluated using X-ray diffraction methods, as the full width at half maximum (FWHM) of the X-ray diffraction profile from the peened surface was decreased, although compressive residual stress was introduced. It was found that CSP reduced the micro-strain in the surface, but simultaneously introduced compressive residual stress, i.e., a macro-strain. The results demonstrate that the micro-strain is relieved by CSP without the need for heat treatment, and is, therefore, a sort of annealing. Thus, CSP can renew the metallic material while the shape itself is maintained.

Original languageEnglish
Pages (from-to)3564-3566
Number of pages3
JournalMaterials Letters
Volume62
Issue number20
DOIs
Publication statusPublished - 2008 Jul 31

Keywords

  • Cavitation
  • Microstructure
  • Residual stress
  • Surface modification
  • X-ray techniques

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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