  An analysis of the processes of plastic deformation and acoustic relaxation
in a high-entropy alloy Al$_{0.5}$CoCrCuFeNi was carried out. The following
have been established: dominant dislocation defects; types of barriers that
prevent the movement of dislocations; mechanisms of thermally activated
movement of various elements of dislocation lines through barriers at room and
low temperatures. Based on modern dislocation theory, quantitative estimates
have been obtained for the most important characteristics of dislocations and
their interaction with barriers.
