Suppression of hydrogen-assisted fatigue crack growth in austenitic stainless steel by cavitation peening

O. Takakuwa, H. Soyama

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

In this paper we demonstrate the suppression of hydrogen-assisted fatigue crack growth in type 316L austenitic stainless steel by cavitation peening employing a cavitating jet in air. Plate bending fatigue tests on pre-cracked samples were conducted after cathodic hydrogen charging with and without cavitation peening. Without cavitation peening, the hydrogen effect on the crack growth behavior at low applied stress was clearly demonstrated compared with high applied stress in the fatigue test. The coalescence of sub-cracks and the main crack propagating from the pre-crack were observed in the hydrogen charged specimen. This phenomenon significantly accelerated the crack growth. This unexpected fracture was suppressed by introducing compressive residual stress by cavitation peening regardless of the length of processing time. In addition, lengthier treatment reduced the crack growth rate of the hydrogen charged specimen by 75% compared to an untreated one.

Original languageEnglish
Pages (from-to)5268-5276
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number6
DOIs
Publication statusPublished - Mar 1 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Fingerprint Dive into the research topics of 'Suppression of hydrogen-assisted fatigue crack growth in austenitic stainless steel by cavitation peening'. Together they form a unique fingerprint.

Cite this