Journal
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
Volume 52, Issue -, Pages 38-46Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.calphad.2015.10.014
Keywords
Cementite; Thermodynamic modelling; Iron-carbon; Phase diagram
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On the basis of recently published experimental data a new thermodynamic model for the cementite phase was developed, accounting for its non-stoichiometry in equilibrium with alpha, gamma and liquid solution phases. The predictions from the model were discussed in the context of experimental and ab initio data from the literature. Further, the model was compared to existing models for stoichiometric and nonstoichiometric cementite. It was shown that the resulting description is consistent with thermodynamic descriptions of the Fe-C system, excluding the non-stoichiometry of cementite, from the literature. Thus, the new model is suitable as a basis for multi-component systems correctly predicting the constitution of technically applied alloys. (C) 2015 Elsevier Ltd. All rights reserved.
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