Comparison between thermal and deformation-induced structural relaxation in atomic glasses
Comparison between thermal and deformation-induced structural relaxation in atomic glasses
Plastic yielding in glassy solids has been interpreted as a strain-biased relaxation process, or, equivalently, as a strain-induced glass transition. In the present work, the atomic motions caused by athermal plastic deformation of a binary Lennard-Jones glass are compared to thermal motion in the liquid in terms of the self part of the intermediate structure factor. We find that like at finite temperature, athermal plastic deformation leads to diffusive atomic motion at all length scales beyond about one interatomic distance, effectively promoting structural relaxation. The present approach allows to study the interplay of deformation-induced and thermal relaxation. Preliminary evidence is presented that these two processes occur independently of each other over a wide range of strain rates.
Nandagopal, Magesh
a08fa4a0-1288-413d-95a2-82eca7d1d8f8
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
2002
Nandagopal, Magesh
a08fa4a0-1288-413d-95a2-82eca7d1d8f8
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
Nandagopal, Magesh and Utz, Marcel
(2002)
Comparison between thermal and deformation-induced structural relaxation in atomic glasses.
MRS Proceedings, 754.
(doi:10.1557/PROC-754-CC4.5).
Abstract
Plastic yielding in glassy solids has been interpreted as a strain-biased relaxation process, or, equivalently, as a strain-induced glass transition. In the present work, the atomic motions caused by athermal plastic deformation of a binary Lennard-Jones glass are compared to thermal motion in the liquid in terms of the self part of the intermediate structure factor. We find that like at finite temperature, athermal plastic deformation leads to diffusive atomic motion at all length scales beyond about one interatomic distance, effectively promoting structural relaxation. The present approach allows to study the interplay of deformation-induced and thermal relaxation. Preliminary evidence is presented that these two processes occur independently of each other over a wide range of strain rates.
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Published date: 2002
Organisations:
Chemistry, Faculty of Natural and Environmental Sciences, Magnetic Resonance
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Local EPrints ID: 355576
URI: http://eprints.soton.ac.uk/id/eprint/355576
ISSN: 1946-4274
PURE UUID: 7cde3266-19c6-4c73-b47a-c52ee49132ba
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Date deposited: 21 Nov 2013 14:10
Last modified: 15 Mar 2024 03:44
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Author:
Magesh Nandagopal
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