Abstract
To study the processes of multiscale structure formation far from thermodynamic equilibrium, a series of experiments concerning impact loading of aluminum alloy targets has been carried out by nanosecond pulses initiated by a propelling device and a pulsed electron beam. In both cases, large-scale structures of the mesoscopic level have been revealed in the near-contact region of shock loading, the sizes of which decrease with increasing target thickness, while the target material becomes homogeneous. Transition to a homogeneous structure in aluminum 1565 occurs at a target thickness of 2.2 mm with simultaneous change in the macroscopic response (spall strength) of the material for impact loading.
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ACKNOWLEDGMENTS
Investigations were carried out using high-speed impact devices of the Institute for Problems of Mechanical Engineering of the Russian Academy of Sciences, as well as the Neva-01 high-current electron accelerator unique scientific facility at the V.D. Efremov Research Institute of Electrophysical Equipment.
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Translated by G. Dedkov
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Meshcheryakov, Y.I., Zhigacheva, N.I., Konovalov, G.V. et al. Formation of a Мultiscale Structure during Impact Loading of a Solid. Tech. Phys. Lett. 47, 357–359 (2021). https://doi.org/10.1134/S106378502104012X
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DOI: https://doi.org/10.1134/S106378502104012X