Estimation of energy storage rate during macroscopic non-homogeneous plastic deformation of polycrystalline materials

The experimental method of estimation of the energy storage rate $ {\Delta}e_s/{\Delta}w_p$ in the stage of macroscopic non-homogeneous plastic deformation is presented (is the stored energy and $ w_p$ is the energy expended in the plastic deformation). A non-uniform temperature distribution on the surface of the loaded sample as an experimental indicator of the macroscopic non-homogeneous plastic deformation is used. It is shown that during the development of strain localization, a part of the energy stored in the deformed material during previous deformation is released in the form of heat.