Mechanical properties, strength physics and plasticity

Features of high strain rate deformation of aged alloys

V. V. Malashenko<sup>ab

a</sup> Galkin Donetsk Institute for Physics and Engineering, Donetsk, Russia
^b Donetsk State University, Donetsk, Russia

Abstract: The sliding of an ensemble of edge dislocations under high strain rate deformation of an aged binary alloy is theoretically analyzed. An analytical expression of the dependence of the dynamic yield strength on the dislocation density is obtained. The conditions under which this dependence is nonmonotonic and has a minimum and maximum are obtained. The minimum occurs during the transition from the dominance of dynamic drag of dislocations by point defects to the dominance of drag by other dislocations (Taylor hardening). The position of the maximum corresponds to the value of the dislocation density, at which their contribution to the formation of the spectral gap becomes dominant.

Keywords: dislocations, defects, high strain rate deformation, yield strength.

Received: 27.04.2023
Revised: 09.06.2023
Accepted: 20.06.2023

DOI: 10.21883/FTT.2023.08.56156.70

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