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Possible self-organized criticality in the Portevin–Le Chatelier effect during decomposition of solid solution alloys

Published online by Cambridge University Press:  29 December 2011

Nguyen Q. Chinh ,
Tivadar Győri ,
Jenő Gubicza ,
János Lendvai  and
Terence G. Langdon
Nguyen Q. Chinh*
Affiliation:
Department of Materials Physics, Eötvös University Budapest, 1117 Budapest, Pázmany P. sétány 1/A, Hungary
Tivadar Győri
Affiliation:
Department of Materials Physics, Eötvös University Budapest, 1117 Budapest, Pázmany P. sétány 1/A, Hungary
Jenő Gubicza
Affiliation:
Department of Materials Physics, Eötvös University Budapest, 1117 Budapest, Pázmany P. sétány 1/A, Hungary
János Lendvai
Affiliation:
Department of Materials Physics, Eötvös University Budapest, 1117 Budapest, Pázmany P. sétány 1/A, Hungary
Terence G. Langdon
Affiliation:
Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1453; Materials Research Group, School of Engineering Sciences, University of Southampton, Southampton SO17 1BJ, UK
*
Address all correspondence to Nguyen Q. Chinh at [email protected]
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Abstract

Spatial fluctuations of the microstructure suggest possible self-organized criticality in the Portevin–Le Chatelier plastic instability occurring in age-hardenable alloys. The discontinuous yielding found in a supersaturated Al alloy can be characterized by a universal power-law spectrum that is independent of the experimental conditions. The result provides an explanation for the formation of unexpected detrimental strain localizations when samples are severely deformed, giving a framework for studying the simultaneous effects of solute atoms and precipitates in the decomposition of solid solutions.

Type
Rapid Communications
Information
MRS Communications , Volume 2 , Issue 1 , March 2012 , pp. 1 - 4
Copyright
Copyright © Materials Research Society 2011

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References

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