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The atomistic structure and energy of nascent dislocation loops

Shenoy, V. B. and Ortiz, M. and Phillips, R. (1999) The atomistic structure and energy of nascent dislocation loops. Modelling and Simulation in Materials Science and Engineering, 7 (4). pp. 603-619. ISSN 0965-0393. http://resolver.caltech.edu/CaltechAUTHORS:SHEmsmse99

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Abstract

An harmonic lattice theory is used, in conjunction with Mura's theory of eigendistorsions, to study the structure and energetics of nascent dislocation loops in face-centred-cubic (FCC) crystals. An analytical expression for the activation energies of such loops is derived. The results obtained herein indicate that thermal activation of small dislocation loops is possible at high stress levels such as those found in the vicinity of a crack tip. The implications of these results in understanding phenomena such as the brittle-ductile transition are discussed.


Item Type:Article
Additional Information:Copyright © Institute of Physics and IOP Publishing Limited 1999. Received 21 September 1998, accepted for publication 26 May 1999. Print publication: Issue 4 (July 1999).
Record Number:CaltechAUTHORS:SHEmsmse99
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SHEmsmse99
Alternative URL:http://dx.doi.org/10.1088/0965-0393/7/4/309
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7524
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:01 Mar 2007
Last Modified:26 Dec 2012 09:32

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