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

  • Nguyen Q. Chinh (a1), Tivadar Győri (a1), Jenő Gubicza (a1), János Lendvai (a1) and Terence G. Langdon (a2)...

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.

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MRS Communications
  • ISSN: 2159-6859
  • EISSN: 2159-6867
  • URL: /core/journals/mrs-communications
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