Brittle-to-ductile transitions and its relation to the deformability of cementite in fully pearlitic steels

Thiti Sirithanakorn, Masaki Tanaka, Kenji Higashida

    研究成果: Contribution to journalArticle査読

    9 被引用数 (Scopus)

    抄録

    Temperature dependence of the absorbed impact energy in fully pearlitic steels was investigated. Two-step brittle-to-ductile transitions were observed. The value of the activation energy associated with the first transition is comparable to that of low carbon ferritic steels, indicating that the first transition is the brittle-to-ductile transition of ferrite phase in pearlitic steels. It suggests that the first transition is controlled by the dislocation glide in ferrite. The value of the activation energy associated with the second transition is higher than that of the first transition. Micrographs of fracture surfaces and side surfaces after fracture tests suggest that the activation energy associated with the second transition should relate to the deformability of cementite in pearlite, that is, the second transition is controlled by the dislocation activity in cementite of pearlite.

    本文言語英語
    ページ(範囲)383-387
    ページ数5
    ジャーナルMaterials Science and Engineering A
    611
    DOI
    出版ステータス出版済み - 8 12 2014

    All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 凝縮系物理学
    • 材料力学
    • 機械工学

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