Chaos and the jerky flow in Al-Mg polycrystals

Ananthakrishna, G. ; Fressengeas, C. ; Kubin, L. P. (1997) Chaos and the jerky flow in Al-Mg polycrystals Materials Science and Engineering: A, 234-236 . pp. 314-317. ISSN 0921-5093

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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:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Al-Mg Alloys; Chaos; Lyapunov Exponent; Portevin-Le Chatelier Effect
ID Code:91329
Deposited On:18 May 2012 07:25
Last Modified:18 May 2012 07:25

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