Using an indentation test to evaluate the effect of cavitation peening on the invasion of the surface of austenitic stainless steel by hydrogen

O. Takakuwa, H. Soyama

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In order to demonstrate the effect that the compressive residual stress introduced by cavitation peening has on suppressing the invasion of the surface of steel by hydrogen, we examined the surface after hydrogen charging using a spherical indenter. It was demonstrated that hydrogen considerably hardens the surface of austenitic stainless steel by 35% and that the surface hardening induced by hydrogen was reduced with increasing compressive residual stress introduced by cavitation peening. Moreover, the surface hardness was restored to its initial state after two weeks due to hydrogen desorption from the charged surface. This shows that the hardening was caused by the invasion of the surface by hydrogen and that the introduction of compressive residual stress suppresses it.

Original languageEnglish
Pages (from-to)3747-3750
Number of pages4
JournalSurface and Coatings Technology
Volume206
Issue number18
DOIs
Publication statusPublished - 2012 May 15

Keywords

  • Compressive residual stress
  • Hydrogen embrittlement
  • Indentation test
  • Peening
  • Stainless steel
  • Surface hardening

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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