Suppression of fatigue crack growth in austenite stainless steel by cavitation peening

Osamu Takakuwa, Masaaki Nishikawa, Hitoshi Soyama

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

5 Citations (Scopus)

Abstract

Cavitation normally causes severe damage in hydraulic machinery such as pumps and turbines by the impact produced by cavitation bubbles collapsing. Although cavitation is known as a factor of erosion, Soyama et al. succeeded in utilizing impacts of cavitation bubble collapsing for surface modification by controlling cavitating jet in the same way as shot peening. The local plastic deformation caused by cavitation impact enhances the fatigue strength of metallic materials, and the surface modification technique utilizing cavitation impact is called "cavitation peening (CP)". It is well known that the peening improves fatigue strength by introducing compressive residual stress on the surface, but little attention has been paid to the behavior of fatigue crack growth of the material which was modified by CP. In the present study, the fatigue behavior of austenite stainless steel with and without CP was evaluated by a plate bending fatigue test, and the results revealed that the compressive residual stress introduced by CP suppresses fatigue crack growth rate by 70 % compared to that without CP.

Original languageEnglish
Title of host publicationAdvances in Fracture and Damage Mechanics IX, FDM 2010
Pages641-644
Number of pages4
DOIs
Publication statusPublished - Jan 6 2011
Externally publishedYes
Event9th International Conference on Fracture and Damage Mechanics, FDM 2010 - Nagasaki, Japan
Duration: Sep 20 2009Sep 22 2009

Publication series

NameKey Engineering Materials
Volume452-453
ISSN (Print)1013-9826

Other

Other9th International Conference on Fracture and Damage Mechanics, FDM 2010
CountryJapan
CityNagasaki
Period9/20/099/22/09

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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