Abstract
A quasi-subregular solution model is used to describe the thermodynamic properties of the liquid phase; values of the solution parameters are obtained from extensive and consistent thermochemical data reported in the literature. For the fcc and bcc phases, the same model is used to account for the nonmagnetic part of the Gibbs energy and the magnetic contribution is taken from the previous paper. Again, the values for the quasi-subregular solution parameters for the fcc phase are obtained from extensive and consistent thermochemical data reported in the literature at high temperatures. The values of the solution parameters for the bcc phase are obtained from the thermodynamic values of the liquid and fcc phases and the known phase boundary data. The calculated phase equilibria are in good agreement with the available data. Based on the thermodynamic data, the metastablel + γ andl + δ phase boundaries as well as theT 0 (γ + l) andT 0(δ +l) curves are calculated.
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Chuang, YY., Hsieh, KC. & Chang, Y. A thermodynamic analysis of the phase equilibria of the Fe-Ni system above 1200 K. Metall Trans A 17, 1373–1380 (1986). https://doi.org/10.1007/BF02650118
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DOI: https://doi.org/10.1007/BF02650118