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 - 2016 Jan 1
Externally publishedYes

Keywords

  • Fatigue crack growth
  • Frequency dependency
  • Hydrogen gas atmosphere
  • Low carbon steel
  • Pre-cracked specimen

ASJC Scopus subject areas

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

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