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Mechanical characteristics of marine-grade aluminum alloys at high loading rates
Russian version
Savenkov G.G.1,2, Sycheva T.I.2, Shchukina E.V.2, Balandin V. Vas.3, Bragov A.M3
1Saint-Petersburg State Institute of Technology (Technical University), St. Petersburg, Russia
2JSC Concern Sea Underwater Weapon – Gidropribor, St. Petersburg, Russia
3Lobachevsky State University, Nizhny Novgorod, Russia
Email: sav-georgij@yandex.ru
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The results of experimental studies to determine the dynamic characteristics of aluminum alloys 1561 and 1575-1 at strain rates of ~ 103 and ~ 104 s-1 are presented. Tests at a strain rate of 103 s-1 were carried out on an installation implementing the Hopkinson split rod technique. Tests at a strain rate of 104 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 (>300 m/s) 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.
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