High speed solidification and melting concentrated solutions andconstruction of Hillert parallel

V.G. Lebedev, P. K. Galenko

ABSTRACT:

A model of the field phase for solidification processes and melting of binary concentrated solution (melt) is proposed in this paper. To derive the thermodynamically consistent equations of the model and to consider the low and high speeds of the phase transformation a method of extended irreversible thermodynamics was used. To determine the driving forces of the solidification or melting of the binary system a Hillert parallel structure was applied. While describing the thermodynamic equilibrium states the Gibbs potentials are assumed to be known. These potentials are assigned by existing thermodynamic databases or on the basis of experimental data. The results of numerical studies of the model are presented.

KEYWORDS:

 hardening, local non equilibrium, phase field, driving forces