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

Osamu Takakuwa, H. Soyama

Research output: Contribution to journalArticle

12 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 - May 15 2012

Fingerprint

peening
Shot peening
austenitic stainless steels
Austenitic stainless steel
cavitation flow
indentation
Indentation
Cavitation
Hydrogen
hydrogen
Compressive stress
residual stress
Residual stresses
hardening
Hardening
Steel
charging
Desorption
hardness
desorption

All Science Journal Classification (ASJC) codes

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

Cite this

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N2 - 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.

AB - 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.

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