Distribution of Thermally Activated Plastic Events in a Flowing Glass
Name
Rodney-2009-Distribution of Ther.pdf
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743.45 KB
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Checksum (MD5)
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Author(s)
Schuh, Christopher A.
Rodney, David
Date Issued
June 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
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.
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.102.235503
