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Mechanical properties and energy dissipation in ultrafine-grained AMts and V95 aluminum alloys during dynamic compression |
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| Authors: | A N Petrova I G Brodova O A Plekhov O B Naimark E V Shorokhov |
| Affiliation: | 1. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, Ekaterinburg, 620990, Russia 2. Institute of Continuous Media Mechanics, Ural Branch, Russian Academy of Sciences, ul. Akademika Koroleva 1, Perm, 614013, Russia 3. Russian Federal Nuclear Center-Zababakhin All-Russia Research Institute of Technical Physics, P.O.Box 245, Snezhinsk, Chelyabinsk Region, 456770, Russia |
| Abstract: | The thermomechanical characteristics of ultrafine-grained AMts and V95 aluminum alloys with an average crystallite size of 200–600 nm are experimentally studied during dynamic compression. The alloys are fabricated by dynamic channel angular pressing. It is found that the deformation history of the alloys and the initial characteristics of their structural state affect the subsequent plastic deformation and the dissipation of applied energy. The studies of the thermodynamics of deformation in combination with structural investigations before and after dynamic compression allowed us to reveal the main structural relaxation mechanisms in the materials during dynamic compression and to determine the dissipation abilities of various defect structures. |
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