Distribution of Thermally Activated Plastic Events in a Flowing Glass
Author(s)Schuh, Christopher A.; Rodney, David
MetadataShow full item record
The potential energy landscape of a flowing metallic glass is revealed using the activation-relaxation technique. For a two-dimensional Lennard-Jones system initially deformed into a steady-state condition through quasistatic shear, the distribution of activation energies is shown to contain a large fraction of low-energy barriers, consistent with a highly nonequilibrium flow state. The distribution of plastic strains has a fundamentally different shape than that obtained during quasistatic simulations, exhibiting a peak at finite strain and, after elastic unloading, a nonzero mean plastic strain that evidences a polarization of the flow state. No significant correlation is found between the activation energy of a plastic event and its associated plastic strain.
DepartmentMassachusetts Institute of Technology. Department of Materials Science and Engineering
Physical Review Letters
American Physical Society
Rodney, David , and Christopher Schuh. “Distribution of Thermally Activated Plastic Events in a Flowing Glass.” Physical Review Letters 102.23 (2009): 235503. (C) 2010 The American Physical Society.
Final published version