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

研究成果: ジャーナルへの寄稿学術誌査読

抄録

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.

本文言語英語
ページ(範囲)605-610
ページ数6
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
101
11
DOI
出版ステータス出版済み - 2015

!!!All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 物理化学および理論化学
  • 金属および合金
  • 材料化学

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