Shock-induced time-dependent strength behavior in amorphous alloys from a microscopic view

KG Chen and YY Yu and ZG Zhang and SQ Shi, SCRIPTA MATERIALIA, 120, 62-66 (2016).

DOI: 10.1016/j.scriptamat.2016.04.020

Shock-induced strength behavior and the corresponding microstructural evolution have remained unclear for decades. We propose a viscous-solid model from a microscopic view implied by simulations with non equilibrium molecular dynamics. The model describes the shocked microstructure very well and shows time dependent strength behavior upon shock-induced yielding in amorphous alloys. For the first time, we find that the Kohlrausch-Williams-Watts equation phi(t) = e(-(t/)beta) is quantitatively applicable in the modelling of time dependent strength behavior at the non-equilibrium shockwave front. The parameters in the KohlrauschWilliams-Watts equation are found to agree well with several experimental facts. (C) 2016 Elsevier Ltd. All rights reserved.

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