Formation of the internal structure of solids under severe action

TL;DR

This paper develops a thermodynamic framework for understanding defect formation and motion in solids under severe deformation, integrating kinetic equations with energy conservation laws and validating through computer simulations.

Contribution

It introduces a new form of kinetic equations that symmetrically incorporate internal and free energies, extending thermodynamic identities to defect dynamics.

Findings

Derived a new kinetic equation for vacancy theory.

Extended thermodynamic identity to defect formation processes.

Simulated severe plastic deformation and derived the Rybin kinetic equation.

Abstract

On the example of a particular problem, the theory of vacancies, a new form of kinetic equations symmetrically incorporation the internal and free energies has been derived. The dynamical nature of irreversible phenomena at formation and motion of defects (dislocations) has been analyzed by a computer experiment. The obtained particular results are extended into a thermodynamic identity involving the law of conservation of energy at interaction with an environment (the 1st law of thermodynamics) and the law of energy transformation into internal degree of freedom (relaxation). The identity is compared with the analogous Jarzynski identity. The approach is illustrated by simulation of processes during severe plastic deformation, the Rybin kinetic equation for this case has been derived.