This article is cited in 1 paper

Mechanical properties, strength physics and plasticity

Dependence of dynamic yield stress of binary alloys on the dislocation density under high-energy impacts

V. V. Malashenko<sup>ab

a</sup> O O Galkin Donetsk Institute for Physics and Engineering, National Academy of Sciences of Ukraine
^b Donetsk National University

Abstract: The above-barrier motion of edge dislocations under high-energy impacts on binary alloys containing Guinier–Preston zones is theoretically analyzed. It is shown that in the case of high strain rate deformation of such alloys, the dependence of the yield strength on the dislocation density deviates from the Taylor relation and is a nonmonotonic function with a maximum. The position of the maximum corresponds to the density of dislocations, at which their contribution to the formation of the spectral gap becomes dominant.

Keywords: dislocations, Taylor ratio, high-strain rate deformation, dynamic yield strength.

Received: 31.03.2020
Revised: 31.03.2020
Accepted: 15.04.2020

DOI: 10.21883/FTT.2020.10.49919.075

 English version: Physics of the Solid State, 2020, 62:10, 1886–1888

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