Fe-N 二元フェライト鋼における微小疲労き裂進展抵抗の熱的安定性

Motomichi Koyama, Kishan Habib, Tatsuo Yokoi, Eisaku Sakurada, Nobuyuki Yoshimura, Kohsaku Ushioda, Kaneaki Tsuzaki, Hiroshi Noguchi

研究成果: Contribution to journalArticle査読

抄録

We investigated the effect of solute nitrogen on threshold stress intensity factor range, ΔKth, of the growth of small cracks using a water-quenched Fe-0.011N (wt.%) binary alloy, in terms of strain-age hardening. Fatigue tests were carried out for micro-notched specimens at 20°C and 160°C at a frequency of 30 Hz with a stress ratio of –1. The nitrogen effect on ΔKth at room temperature was significant, but smaller than the carbon effect. On the other hand, the thermal stability of the strain aging effect on ΔKth was higher in the Fe-0.011N steel than in Fe-C steels containing supersaturated carbon, because the nitrogen solubility above room temperature is higher than the carbon solubility in ferritic steels.

寄稿の翻訳タイトルThermal Stability of Resistance to Propagation of Mechanically Small Fatigue-cracks in an Fe-N Binary Ferritic Steel
本文言語日本語
ページ(範囲)130-138
ページ数9
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
106
6
DOI
出版ステータス出版済み - 6 2020

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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