Multiscale Modeling Approach to Acoustic Emission during Plastic Deformation

Kumar, Jagadish and Ananthakrishna, G (2011) Multiscale Modeling Approach to Acoustic Emission during Plastic Deformation. In: Physical Review Letters, 106 (10).

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Abstract

We address the long-standing problem of the origin of acoustic emission commonly observed during plastic deformation. We propose a framework to deal with the widely separated time scales of collective dislocation dynamics and elastic degrees of freedom to explain the nature of acoustic emission observed during the Portevin-Le Chatelier effect. The Ananthakrishna model is used as it explains most generic features of the phenomenon. Our results show that while acoustic emission bursts correlated with stress drops are well separated for the type C serrations, these bursts merge to form nearly continuous acoustic signals with overriding bursts for the propagating type A bands.

Item Type:	Journal Article
Publication:	Physical Review Letters
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	30 Mar 2011 07:19
Last Modified:	30 Mar 2011 07:19
URI:	http://eprints.iisc.ac.in/id/eprint/36335

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