Structural Transformations in Aluminum Cylindrical Shells under Dynamic Loading
A. V. Koval'1, I. G. Shirinkina2, A. N. Petrova2,3, I. G. Brodova2,3, E. B. Smirnov1, E. V. Shorokhov1
1All-Russian Scientific Research Institute of Technical Physics, Snezhinsk, 456770 Russia
2Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620990 Russia
3Ural Federal University named after the first President of Russia B. N. Yeltsin, Yekaterinburg, 620002 Russia
Keywords: алюминиевый сплав, оболочка, ударная волна, просвечивающая электронная микроскопия, микротвердость, упрочнение, рекристаллизация, aluminum alloy, shell, shock wave, transmission electron microscopy, microhardness, strengthening, recrystallization
Abstract
This paper describes the structural studies of hollow cylindrical shells made of D16 and AMts aluminum alloys, loaded by sliding detonation. Explosive loading conditions for the complete convergence and closure of shells are established. Light optics scanning electron microscopy, and transmission electron microscopy are applied to study the structural and phase transformations in shells under shock-wave loading. The relation of composition, structure, and mechanical characteristics of alloys with their behavior under the action of shock loading is shown. There are several scenarios of convergence of shells, depending on their composition and loading conditions - from complete and steady convergence to multiple spalling.
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