Estimation of the density of mobile dislocations by the acoustic method

S. A. Barannikova, P. V. Lavrent'eva, L. B. Zuev

Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, Tomsk

Abstract: Using polycrystalline Al as an example, it is demonstrated that measuring the propagation velocity of ultrasound (Rayleigh surface waves) provides information on the development of deformation processes in the metal. The acoustic wave parameters determined during the study make it possible to estimate the density of mobile dislocations in the deformed metal under quasi-static loading. The complex (extreme) nature of the dependence of the density of mobile dislocations on deformation is noted, and the nature of this dependence is discussed. It is suggested that the obtained results can be used for calculating deformation kinetics.

Keywords: plasticity, strain hardening, dislocations, ultrasound.

Received: 28.07.2025
Revised: 02.09.2025
Accepted: 05.09.2025

DOI: 10.61011/PJTF.2026.02.62064.20455

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