Characteristic fatigue crack growth behavior of low carbon steel under low-pressure hydrogen gas atmosphere in an ultra-low frequency

Yosuke Ohnishi, Motomichi Koyama, Daisuke Sasaki, Hiroshi Noguchi

Research output: Contribution to journalArticle

Abstract

In order to clarify an influence of hydrogen on the fatigue crack propagation in ultra-low frequency region, we investigated the crack propagation rates of S10C at different frequencies in hydrogen and nitrogen atmospheres. In the low-pressure hydrogen gas atmosphere, the crack propagation rate decreased with decreasing in frequency within the present experimental range. In particular, the crack propagation rate in the ultra-low frequency (10-3 Hz) became the same as that in nitrogen atmosphere. To explain the disappearance of the hydrogen effect in the ultra-low frequency, we proposed that carbon diffusion causing strain-age hardening also contributes to the decrease in crack propagation rate in the ultra-low frequency under the hydrogen atmosphere.

Original languageEnglish
Pages (from-to)605-610
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume101
Issue number11
DOIs
Publication statusPublished - Jan 1 2015

Fingerprint

extremely low frequencies
low carbon steels
Low carbon steel
crack propagation
Fatigue crack propagation
Hydrogen
low pressure
cracks
Gases
Crack propagation
atmospheres
hydrogen
gases
Nitrogen
nitrogen
precipitation hardening
Age hardening
Strain hardening
Carbon
carbon

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Cite this

Characteristic fatigue crack growth behavior of low carbon steel under low-pressure hydrogen gas atmosphere in an ultra-low frequency. / Ohnishi, Yosuke; Koyama, Motomichi; Sasaki, Daisuke; Noguchi, Hiroshi.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 101, No. 11, 01.01.2015, p. 605-610.

Research output: Contribution to journalArticle

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