Cyclic character of the evolution of the defect structure and the properties of metallic materials during megaplastic deformation

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...

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Bibliographic Details
Published in:Russian metallurgy Metally 2015-04, Vol.2015 (4), p.269-273
Main Authors: Metlov, L. S., Glezer, A. M., Varyukhin, V. N.
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Crystal defects
Deformation
Deformation effects
Dislocations
Dynamical systems
Evolution
Materials Science
Mathematical models
Metallic Materials
Physical Foundations of Strength and Plasticity
Wave equations
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Summary: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.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029515040084