Introduction of compressive residual stress into titanium alloy Ti6Al4V by cavitation shotless peening

Hitoshi Soyama, Dan Odhiambo, Shankar Mall

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Cavitation impacts induced by a submerged water jet with cavitation, i.e. a cavitating jet, can introduce the compressive residual stress into metals as same way as shot peening. In case of peening by using cavitation impacts, shots are not required, then it is called cavitation shotless peening CSP. The blade/disk dovetail joint in turbine engine commonly fails due to fretting fatigue. The introduction of the compressive residual stress is the most significant factor in improvement of fretting fatigue behavior of metals. In order to investigate the possibility of CSP on reduction of fretting fatigue of titanium alloy, Ti6Al4V, the residual stress of the titanium alloy peened by CSP was measured by using an X-ray diffraction method. It was concluded that CSP can introduce the compressive residual stress into the titanium alloy. The compressive residual stress at the surface peened by CSP is larger than that of shot peening and the roughness of CSP is smoother than that of shot peening.

Original languageEnglish
Pages (from-to)836-840
Number of pages5
JournalZairyo/Journal of the Society of Materials Science, Japan
Volume53
Issue number8
DOIs
Publication statusPublished - 2004 Aug

Keywords

  • Cavitation
  • Peening
  • Residual stress
  • Surface modification
  • Surface roughness
  • Titanium

ASJC Scopus subject areas

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

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