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Evolution of shock-induced orientation-dependent metastable states in crystalline aluminum
Mikalai M Budzevich1, Vasily V Zhakhovsky, Carter T White
1Department of Physics, University of South Florida, Tampa, Florida 33620, USA.
Abstract:
The evolution of orientation-dependent metastable states during shock-induced solid-liquid phase transitions in crystalline Al is followed using moving window molecular dynamics simulations. The orientation-dependent transition pathways towards an orientation-independent final state Hugoniot include both "cold melting" followed by recrystallization in [110]- and [111]-oriented shock waves and crystal overheating followed by melting in [100] shock waves. The orientation-dependent dynamics take place within a zone that can extend up to hundreds of nanometers behind the shock front.
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