Abstract
The principle of nonequilibrium evolution thermodynamics is applied to describe the cyclic evolution of the defect structures in metallic materials subjected to megaplastic (severe) plastic deformation. A unimodal distribution of defects over deformation-induced dislocations and the grain boundaries that appear during dynamic recrystallization is considered as an initial model. It is shown that taking into account memory (inertia) effects during deformation-induced restructuring transforms basic relations to the form characteristic of wave equations with damping. In this case, a deformed system executes damped oscillations and gradually reaches stationary structural parameters.
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Original Russian Text © L.S. Metlov, A.M. Glezer, V.N. Varyukhin, 2014, published in Deformatsiya i Razrushenie Materialov, 2014, No. 5, pp. 8–13.
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Metlov, L.S., Glezer, A.M. & Varyukhin, V.N. Cyclic character of the evolution of the defect structure and the properties of metallic materials during megaplastic deformation. Russ. Metall. 2015, 269–273 (2015). https://doi.org/10.1134/S0036029515040084
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DOI: https://doi.org/10.1134/S0036029515040084