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

Yosuke Onishi, Motomichi Koyama, Daisuke Sasaki, Hiroshi Noguchi

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 at 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)855-860
Number of pages6
Journalisij international
Volume56
Issue number5
DOIs
Publication statusPublished - Jan 1 2016

Fingerprint

Low carbon steel
Fatigue crack propagation
Hydrogen
Gases
Crack propagation
Nitrogen
Age hardening
Strain hardening
Carbon

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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

In: isij international, Vol. 56, No. 5, 01.01.2016, p. 855-860.

Research output: Contribution to journalArticle

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