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Chaos and the jerky flow in Al-Mg polycrystals

Ananthakrishna, G and Fressengeas, C and Kubin, LP (1997) Chaos and the jerky flow in Al-Mg polycrystals. In: Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing, 234 . pp. 314-317.

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Abstract

The stress versus time signals generated in Al-3%Mg polycrystalline samples deformed in constant strain rate have been analysed in order to check the prediction that jerky flow should exhibit chaotic behaviour. The analysis was carried out with the help of several complementary methods, showing the existence of a finite correlation dimension and a positive Lyapunov exponent. The results unambiguously show the existence of chaos resulting from the non-linear interaction of four or five degrees of freedom.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science
Keywords: Al-Mg alloys;chaos;Lyapunov exponent;Portevin Le Chatelier effect
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Mr. S Muthuraja
Date Deposited: 29 May 2009 06:41
Last Modified: 19 Sep 2010 05:24
URI: http://eprints.iisc.ac.in/id/eprint/18663

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