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 language | English |
---|---|
Pages (from-to) | 3747-3750 |
Number of pages | 4 |
Journal | Surface and Coatings Technology |
Volume | 206 |
Issue number | 18 |
DOIs | |
Publication status | Published - 2012 May 15 |
Externally published | Yes |
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