期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 539, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2020.120069
关键词
Metallic glasses; Atomic dynamics; Oscillatory shear; Structural relaxation; Molecular dynamics simulations
资金
- National Natural Science Foundation of China (NSFC) [11804394]
The influence of quenching condition on the aging and the rejuvenation effect was investigated by classical molecular-dynamics simulations on CuZr metallic glasses under oscillatory shear. Atomic dynamics underlying this procedure is focused. We found a separation of fast and slow atoms in the non-equilibrium state, with an exponential tail in the displacement distribution function contributed by the fast atoms, similar to that in the glass-forming liquids. However, we do not observe any localized relaxation process, e.g., the cage relative motion, which is prominent in the supercooled liquids. Structural relaxation in the fluidized glasses exhibits a simple exponential decay, in contrast to the stretched exponential law in liquids. This dynamic significance is ascribed to the subextensive feature of the atomic displacement in the sheared amorphous solids.
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