Temperature dependence of the kinetics rate of the melting and crystallization of aluminum

Аннотация

Using the molecular dynamics method, heterogeneous melting–crystallization of aluminum is simulated under conditions when the phase front propagates over the overheated-overcooled phase. The dependence of the phase front velocity on the temperature deviation from the equilibrium melting temperature is determined. The dependence obtained from atomistic simulation is used as an approximating function to obtain the temperature dependence of the kinetic rate in the analytical form. The steady-state temperature dependence of the kinetic rate v(T_sℓ) for extreme values of aluminum overheating-overcooling is constructed for the first time.