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A theoretical analysis of the spinodal decomposition in Fe- C martensite during aging stage of tempering

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Abstract

A thermodynamic model of Fe-C martensite is proposed, which has a distinct physical meaning and is easily treated mathematically (high order derivation). When applying this model to the spinodal decomposition in Fe-C martensite during aging, the theoretical values (critical compositions, sizes of products) are in good agreement with experimental data. The miscibility gap of Fe-C martensite is set up. From this diagram, it is clear that spinodal decomposition may affect the later stages of tempering of medium and high carbon steels. Finally, the discussion shows that A1, A2 stages of aging are both spinodal decomposition, but to different extents.

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Authors and Affiliations

  1. Research Institute for Strength of Metals, Xi'an Jiaotong University, Xi'an, China

    S. B. Ren (Postgraduate Student) & S. T. Wang (Wang Xiao Tian) (Professor of Engineering)

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  1. S. B. Ren
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  2. S. T. Wang (Wang Xiao Tian)
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Ren, S.B., Wang (Wang Xiao Tian), S.T. A theoretical analysis of the spinodal decomposition in Fe- C martensite during aging stage of tempering. Metall Trans A 19, 2427–2432 (1988). https://doi.org/10.1007/BF02645470

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  • DOI: https://doi.org/10.1007/BF02645470

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