The brittle-to-ductile transition in severely deformed low carbon steel

Masaki Tanaka, Kenji Higashida, Tomotsugu Shimokawa

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抜粋

The brittle-to-duetile transition (BDT) behaviour was investigated in low carbon steel deformed by an accumulative roll-bonding (ARB) process. The temperature dependence of fracture toughness was measured by conducting four-point bending tests at various strain rates. The fracture toughness increased while the BDT temperature decreased in the specimens deformed by the ARB process. Arrhenius plots between the BDT temperatures and the strain rates indicated that the activation energy for the BDT did not change due to the deformation with the ARB process. It indicated that the decrease in the BDT temperature by grain refining was not due to the reduction in the dislocation mobility with respect to short-range barriers. Quasi-three-dimensional simulations of discrete dislocation dynamics indicated that the decrease in the number of dislocation sources decreases in the BDT temperature. The roles of grain boundaries will be also discussed in order to explain the decrease in the BDT temperature.

元の言語英語
ホスト出版物のタイトルTMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings
ページ787-794
ページ数8
出版物ステータス出版済み - 5 28 2010
イベントTMS 2010 - 139th Annual Meeting and Exhibition - Seattle, WA, 米国
継続期間: 2 14 20102 18 2010

出版物シリーズ

名前TMS Annual Meeting
2

その他

その他TMS 2010 - 139th Annual Meeting and Exhibition
米国
Seattle, WA
期間2/14/102/18/10

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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  • これを引用

    Tanaka, M., Higashida, K., & Shimokawa, T. (2010). The brittle-to-ductile transition in severely deformed low carbon steel. : TMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings (pp. 787-794). (TMS Annual Meeting; 巻数 2).