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Optimally rejuvenated model binary glasses
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DOI：10.1103/PhysRevMaterials.6.125604.png)
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Abstract
En 中文
Using the creation relaxation algorithm developed for the atomistic modeling of the high-dose irradiation limit of crystalline systems, we explore the limits of the structural rejuvenation of a highly excited model binary glass. This high-energy athermal amorphous structure exhibits a direct transition to homogeneous plastic flow and a microstructure that is largely insensitive to this flow, being characterized by a porous system-spanning network of minimally frustrated structural motifs. The observed homogeneous plasticity is mediated by the same string-like structural excitations, which mediate structural relaxation and microplasticity at finite temperature in more relaxed structures. This highly rejuvenated structural asymptote is not far from the structural state of regions, which have experienced athermal shear localization in more relaxed samples, suggesting an optimally rejuvenated glassy structure will always be limited by that produced by shear localization.
Keywords:
POTENTIAL-ENERGY LANDSCAPE
BOND-ORIENTATIONAL ORDER
BULK METALLIC-GLASS
STRUCTURAL RELAXATION
SHEAR-BAND
DYNAMICS
LIQUIDS
DEFORMATION
ALLOY
VIBRATIONS
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