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Thermodynamics of the massive transformation

  • Symposium on The Massive Transformation
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Abstract

The thermodynamic nature of the massive transformation may be revealed by finding the limiting conditions for the massive mode of growth. A review of the experimental information available indicates strongly that the solvus line rather than theT 0 line is the natural limit. Some observations of massive transformation inside the two-phase field may be explained by the effect of coherency strains in the composition spike formed in front of the interface. This spike has a significant thickness in many cases and can explain the role of the solvus. It is exceedingly thin in iron-base alloys, and the role of the solvus may there be explained by higher diffusivity inside the interface. A comparison is made with the transformation of γ in Fe-M-C alloys where the situation is very similar.

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Authors and Affiliations

  1. Physical Metallurgy, Royal Institute of Technology, S-10044, Stockholm 70, Sweden

    Mats Hillert (Professor)

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  1. Mats Hillert
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Additional information

This paper is based upon a presentation made at a symposium on The Massive Transformation, held at the Pittsburgh meeting of The Metallurgical Society of AIME and the Materials Science Division of ASM, October 9, 1980, under the sponsorship of the MSD Phase Transformations Committee.

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Hillert, M. Thermodynamics of the massive transformation. Metall Trans A 15, 411–419 (1984). https://doi.org/10.1007/BF02644964

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  • DOI: https://doi.org/10.1007/BF02644964

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