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Spatio-temporal features of the Portevin-Le Chatelier effect

Ananthakrishna, G (2005) Spatio-temporal features of the Portevin-Le Chatelier effect. In: Materials Science And Engineering A, 400 . pp. 210-213.

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Abstract

We show that an extension of Ananthakrishna's (AK) model exhibits all the features of the Portevin-Le Chatelier (PLC) effect including the recently observed crossover from a low dimensional chaotic state at low and medium strain rates to a high dimensional power law state of stress drops at high strain rates. The model also displays three types of bands. The dislocation configurations are shown to be in the pinned stated in the chaotic regime (i.e., the region of type C and B bands)and at the edge of unpinning in the power law regime where propagating bands are seen.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elsevier.
Keywords: The Portevin-Le Chatelier effect;Chaos;Power laws;The PLC bands
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 01 Sep 2005
Last Modified: 19 Sep 2010 04:19
URI: http://eprints.iisc.ernet.in/id/eprint/3588

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