Formation of local melting regions in a solid body near the melting temperature

The formation of local melting regions is shown to be ensured by the fluctuation of the vibrational (kinetic) energy in a crystal. This approach is based on the Frenkel’ idea about heterophase fluctuations. Equations that relate the additional volume (ΔV(T)), electrical resistivity (Δρ(T)), or enthalpy (ΔH(T)) increment in solids to the presence of local melting regions are obtained. An analysis of the experimental data demonstrates that 6% of the solid body atoms have the properties of a liquid at the melting temperature. This approach is used to explain some unexpected facts and to calculate the energy of formation (E _f) and concentration (C _m) of vacancies in some metals.