Solids

Mechanical characteristics of marine-grade aluminum alloys at high loading rates

G. G. Savenkov^a, T. I. Sycheva^b, E. V. Shchukina^b, V. V. Balandin^c, A. M. Bragov<sup>c

a</sup> State Technological Institute of St. Petersburg (Technical University)
^b JSC "Concern "Sea Underwater Weapon – Gidropribor", Saint-Petersburg
^c Lobachevsky State University of Nizhny Novgorod

Abstract: The results of experimental studies to determine the dynamic characteristics of aluminum alloys 1561 and 1575$^{-1}$ at strain rates of 10$^3$ 10$^4$ s$^{-1}$ are presented. Tests at a strain rate of 10$^3$ s$^{-1}$ were carried out on an installation implementing the Hopkinson split rod technique. Tests at a strain rate of 10$^4$ s$^{-1}$ were carried out on an installation using the method of flat impactor impact with a target (sample) by recording the velocity of the free surface of the sample with an interferometer VISAR. The structure of flat samples after testing is considered. It is established that the relief of the destroyed surface at high impact velocities is formed due to the chaotic fusion of pores and fractures of stratification of various shapes.

Keywords: aluminum alloys, Hopkinson split rod, deflection strength, dynamic strength, microstructure.

Received: 04.02.2025
Revised: 17.03.2025
Accepted: 11.04.2025

DOI: 10.61011/JTF.2025.08.60900.16-25

Bibliographic databases:

•