The effect of the concentration-dependent diffusivity of carbon in austenite on a model of reaustenitisation from ferrite/cementite mixtures in Fe-C steels

C. Atkinson, T. Akbay

    研究成果: Contribution to journalArticle査読

    12 被引用数 (Scopus)

    抄録

    Phase transformation theory applicable to reaustenitisation that takes place upon heating low-alloy steels is described. The assumption of local equilibrium is made. Diffusivity of interstitial solute in austenite is treated as concentration dependent and no diffusion is allowed in cementite and ferrite. Under these assumptions, the process is controlled by the diffusion of the interstitial solute in the growing phase. A variational dual extremum principle is used to calculate the interstitial solute concentration profile for specified interface motions. These results are compared with those obtained for a constant diffusivity equal to a weighted average of the concentration-dependent diffusivity and to a variety of simple approximations to the full problem.

    本文言語英語
    ページ(範囲)2861-2868
    ページ数8
    ジャーナルActa Materialia
    44
    7
    DOI
    出版ステータス出版済み - 7 1996

    All Science Journal Classification (ASJC) codes

    • 電子材料、光学材料、および磁性材料
    • セラミックおよび複合材料
    • ポリマーおよびプラスチック
    • 金属および合金

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