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Application of the quasi-subsubregular solution model: The iron-carbon system

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Abstract

The quasi-subsubregular solution model introduced by Chuang et al. represents the most complex approach yet to dealing with both compositional and temperature nonregularity in metallic solutions. Evaluation of the model in relation to the Fe-C equilibrium diagram demonstrates that its applicability in dilute solutions is highly dependent on the accuracy of the experimental data from which its coefficients are derived. Lower-temperature equilibria between α-ferrite, aus-tenite, and pure graphite were modeled with reasonable accuracy; the modeling of higher-temperature equilibria in the system was less successful. In particular, experimental difficulties with the measurement of the thermodynamic properties of liquid Fe-C alloys limited the ability of the model to accurately predict the phase diagram. The model can also be used to determine infinite-dilution activity coefficients and to test the adherence of dilute-solution phases to Henrian behavior.

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  1. Department of Metallurgical Engineering, University of Utah, 84112, Salt Lake City, UT

    Mark E. Schlesinger (istant Professor)

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  1. Mark E. Schlesinger
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Schlesinger, M.E. Application of the quasi-subsubregular solution model: The iron-carbon system. Metall Trans A 21, 447–453 (1990). https://doi.org/10.1007/BF02782425

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