Temperature dependence of transgranular fatigue crack resistance in interstitial-free steel and Fe-C steels with supersaturated carbon: Effects of dynamic strain aging and dynamic precipitation

Bochuan Li, Motomichi Koyama, Eisaku Sakurada, Nobuyuki Yoshimura, Kohsaku Ushioda, Hiroshi Noguchi

研究成果: ジャーナルへの寄稿学術誌査読

11 被引用数 (Scopus)

抄録

Tension tests at different temperatures were conducted for two ferritic steels: Fe-0.017C with 0.017% solute carbon content and interstitial-free (IF) steels. It is verified the occurrence of dynamic strain aging (DSA) in Fe-0.017C at high temperatures. Tension tests for the Fe-0.017C, following corresponding heating treatments, demonstrated the transition process of dynamic precipitation from under-aging to over-aging. Moreover, the threshold stress intensity factor ranges (ΔKth) of a small crack for these two steels both decrease with temperature growth. However, the ΔKth of Fe-0.017C was always larger than that of IF steel owing to solid solution hardening and DSA at 293 and 333 K and roughness-induced crack closure and precipitation hardening at 433 K.

本文言語英語
ページ(範囲)1-9
ページ数9
ジャーナルInternational Journal of Fatigue
110
DOI
出版ステータス出版済み - 5月 2018

!!!All Science Journal Classification (ASJC) codes

  • モデリングとシミュレーション
  • 材料科学一般
  • 材料力学
  • 機械工学
  • 産業および生産工学

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