Effects of hydrogen charge on fatigue strength of stainless steels

Toshihiko Kanezaki, Koichi Nagata, Hisao Matsunaga, Yukitaka Murakami

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The effect of hydrogen on fatigue strength of stainless steels was investigated. There were no definite differences in fatigue life of unnotched specimens between hydrogen-charged specimen (2.4-6.4ppm) and uncharged specimen (2.2ppm) of SUS 304. High content of hydrogen (10-100 ppm) was detected in a very thin surface layer, approximately at 100-200 (im from specimen surface of SUS 304 specimens hydrogen-charged for 336-672 hours. There were also no definite differences in fatigue life of unnotched specimens between hydrogen-charged specimen (1.8-5.8ppm) and uncharged specimen (0.1 ppm) of SUS 405. The uncharged specimens of 0.7 C-13 Cr steel (0.2 ppm) failed from subsurface non-metallic inclusions in surface layer. ODAs (Optically Dark Area) were not observed due to the tensile residual stress in the surface layer although the specimens failed in the high cycle regime of 107 cycles. Increasing hydrogen content from 0.2 ppm to 2.4-2.7 ppm, the fatigue strength and fatigue life were markedly decreased in 0.7C-13Cr steel.

Original languageEnglish
Pages (from-to)106-113
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume72
Issue number1
DOIs
Publication statusPublished - Jan 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Effects of hydrogen charge on fatigue strength of stainless steels'. Together they form a unique fingerprint.

Cite this