Dynamics of Edge Dislocations in a Low-Stability FCC-System Irradiated by High-Energy Particles


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Abstract

Using the method of molecular dynamics, the behavior of plastic deformation and defect structure selforganization are investigated in a low-stability condensed FCC-system irradiated with high-energy particles. An analysis of the dynamics of a single edge dislocation and elementary dislocation ensembles, subjected to the action of a post-cascade shock wave, demonstrates that as a result of this action the dislocations are displaced towards the wave source. As this goes on, the roles of both collective effects and external influences on the ensembles of complex interacting defects increase. In particular, the investigation performed in this work demonstrates that the post-cascade shock waves can give rise to migration of not only single edge dislocation but also elementary dislocation ensembles. It is demonstrated that the changes in the dislocation structure of the irradiated material result from the unloading waves following the post-cascade waves, rather than from the latter waves themselves.

About the authors

M. D. Starostenkov

I. I. Polzunov Altai State Technical University

Author for correspondence.
Email: genphys@mail.ru
Russian Federation, Barnaul

A. I. Potekaev

National Research Tomsk State University; V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University

Email: genphys@mail.ru
Russian Federation, Tomsk; Tomsk

A. V. Markidonov

Kuzbass State Technical University, Novokuznetsk Branch

Email: genphys@mail.ru
Russian Federation, Novokuznetsk

V. V. Kulagina

V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University; Siberian State Medical University

Email: genphys@mail.ru
Russian Federation, Tomsk; Tomsk

L. S. Grinkevich

National Research Tomsk State University

Email: genphys@mail.ru
Russian Federation, Tomsk

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