Abstract
The stress relaxation processes of strained Zr50Cu50 metallic glass (MG) are investigated by molecular dynamics simulations. We provide the direct evidence for the strain-accelerated relaxation which can be attributed to the activation of flow units in MGs. Moreover, a crossover from stochastic activation to percolation of flow units corresponding to a critical applied strain can be observed. The temperature influence on the strain-accelerated dynamics is also discussed. Our results may be helpful for the understanding of the relaxation dynamics under applied strain field and deepen the comprehension of the nature of MG.
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