The effect of thermal activation on the evolution of the density of mobile and immobile dislocations during the tension of polycrystalline aluminum is considered. It is established that the parameters of autowave dissipative structures during parabolic strain hardening are related to the dislocation density by nonlinear dependencies. The acoustic wave parameters obtained in the study make it possible to evaluate changes in the microstructural characteristics of the deformed metal under quasistatic loading. It is shown that the combined measurement of strain fields and variations in the Rayleigh wave propagation velocity in the temperature range of 173- 350 K expands the understanding of the nature of such a complex phenomenon as plastic deformation localization within the autowave model of plasticity.
Barannikova et al. (2025) studied this question.