Solids

Effect of annealing on the high-strain-rate deformation of copper in Taylor tests

E. S. Rodionov, A. E. Mayer, V. G. Lupanov, V. V. Pogorelko, P. N. Mayer, Yu. A. Lupitskaya, A. G. Fazlitdinova

Chelyabinsk State University, Chelyabinsk, Russia

Abstract: The results of high-velocity impact experiments with cylindrical and profiled samples made of soft annealed copper with impact velocities up to 103–112 m/s are presented in comparison with previous results for hard cold-rolled copper. 3D numerical simulations of the experiments are performed based on the dislocation plasticity model numerically implemented by the method of smoothed particle hydrodynamics (SPH). It is shown that the dislocation plasticity model, which was previously parameterized using machine learning methods for hard cold-rolled copper, can successfully describe the deformation behavior of soft annealed copper when only the initial dislocation density changes to the level typical for annealed metals. At the same time, the shape of the deformed samples and the deformation behavior of cold-rolled and annealed samples differ significantly. It is shown that the proposed model adequately describes the grain refinement as a result of the dynamic deformation.

Keywords: dynamic deformation, dislocation plasticity model, material microstructure, deformation behavior, dislocation density.

Received: 20.09.2024
Revised: 19.11.2024
Accepted: 20.11.2024

DOI: 10.61011/JTF.2025.04.60008.276-24

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