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Solids

Features of dynamic fracture of ultrafine-grained aluminum alloy AMg4.5

A. D. Evstifeev<sup>ab

a</sup> Research Institute of Mechanics, N. Novgorod State University, 603022 Nizhny Novgorod, Russia
^b Saint Petersburg State University, 199034 St. Petersburg, Russia

Abstract: The features of the fracture of the aluminum alloy AMg4.5 under dynamic tension according to the Kolsky methods using Split-Hopkinson pressure bar are considered. Experimental and theoretical data of strength characteristics of the alloy in the initial coarse-grained and ultrafine-grained states are presented. It is shown that the high degree of deformation of the material obtained in the process of severe plastic deformation by torsion under high pressure has a negative effect on the dynamic strength of the material.

Keywords: dynamic strength, incubation time criterion, Split-Hopkinson pressure bar, severe plastic deformation.

Received: 11.02.2022
Revised: 16.05.2022
Accepted: 17.05.2022

DOI: 10.21883/JTF.2022.09.52926.33-22

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