CC BY
8LP-I-19
Modeling of thermodynamic properties and phase transitions of refractory metals under conditions of intense pulsed influences
K.V. Khishchenko1
Joint Institute for High Temperatures RAS, Moscow, Russia
Models of thermodynamic properties and phase transitions of materials are required for numerical simulations of time-dependent physical processes at laser technologies. In the present work, an equation of state for a refractory metal (rhenium) is proposed with taking into account melting and evaporation effects. As distinct from the previously known multiphase equation of state, new expressions for the thermodynamic potentials are formulated. Those provide for a more correct thermal contribution of ions in the liquid phase under extension. A critical analysis of calculated results is made in comparison with available data from experiments with intense pulsed influences upon the metal. The equation of state can be used efficiently in simulations of intense laser-material interactions.
The work is supported by the Russian Science Foundation (grant No. 19-19-00713).
