This article is cited in 1 paper

Metals

Dynamic atomic displacements and athermal dislocation glide in crystals

Yu. A. Khon^a, H. Zapolsky<sup>b

a</sup> Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
^b University of Rouen Normandy, Rouen, France

Abstract: A dislocation glide mechanism at low temperatures is proposed. The mechanism is based on taking into account the dynamic displacements of atoms – displacements caused by nonadiabatic transitions of atoms in a crystal with a dislocation under the action of an external force. Dynamic displacements initiate the instability of a direct dislocation of relatively low-amplitude displacements during atomic vibrations. The development of instability leads to the formation of a double kink and a dislocation shift by one interatomic distance.

Keywords: dislocation, dynamic displacements, dynamic instability, athermal dislocation glide.

Received: 20.06.2019
Revised: 20.06.2019
Accepted: 27.11.2019

DOI: 10.21883/FTT.2020.04.49112.533

 English version: Physics of the Solid State, 2020, 62:4, 587–591

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