Thermochimica Acta, Vol.578, 35-42, 2014
Thermodynamic modeling of the Cr-Ni-Ti system using a four-sublattice model for ordered/disordered bcc phases
A thermodynamic assessment of the ternary Cr-Ni-Ti system together with a refinement for the thermodynamic description of the binary Ni-Ti sub-system is performed following the CALPHAD method and using the compound energy formalism (CEF). The ordered/disordered transition between disordered Bcc_A2 and ordered Bcc_B2 phases is described using a four-sublattice (4SL) model. An optimal set of thermodynamic parameters for the Cr-Ni-Ti system is obtained by considering the experimental data from the literature. Comparisons between the calculated and measured phase diagrams indicate that almost all of the reliable experimental information is satisfactorily accounted for by the present modeling. The complete liquidus projection and reaction scheme of the Cr-Ni-Ti system are also presented. (C) 2014 Elsevier B.V. All rights reserved.