TABULAR MULTIPHASE EQUATIONS OF STATE FOR METALS AND THEIR APPLICATIONS

We present a method of interpolation of thermodynamic functions calculated by means of a multiphase equation of state for metals. The method takes into account melting, evaporation and sublimation phase transitions. It can be also applied in metastable regions of phase diagram including those under negative pressures. The method allows one to unambiguously determine the phase state of a given point of phase diagram. Several applications of the tabular multiphase equations of state are considered: simulation of the initial stage of electrical explosion of metal wires, formation of striations, interaction of intense laser pulses with matter etc. Information about phase state in every point of the flux allows us to study phase transition waves, apply different destruction criteria and analyze processes in metastable regions.