Skip to main content
×
Home
    • Aa
    • Aa

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)...
Abstract
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.

Copyright
Corresponding author
Address all correspondence to Nguyen Q. Chinh at chinh@metal.elte.hu
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.


4.F. Chmelík , A. Ziegenbein , H. Neuhäuser , and P. Lukac : Investigating the Portevin-Le Chatelier effect by the acoustic emission and laser extensometry techniques. Mater. Sci. Eng., A 324, 200 (2002).

5.M. Lebyodkin , Y. Brechet , Y. Estrin , and L.P. Kubin : Statistics of the catastrophic slip events in the Portevin-Le Chatelier effect. Phys. Rev. Lett. 74, 4758 (1995).

6.A.H. Cottrell : A note on the Portevin-Le Chatelier effect. Philos. Mag. 44, 829 (1953).

8.G. Sha and A. Cerezo : Kinetic Monte Carlo simulation of clustering in an Al-Zn-Mg-Cu alloy (7050). Acta Mater. 53, 907 (2005).

9.N.Q. Chinh , J. Gubicza , T. Czeppe , J. Lendvai , C. Xu , R.Z. Valiev , and T.G. Langdon : Developing a strategy for the processing of age-hardenable alloys by ECAP at room temperature. Mater. Sci. Eng., A 516, 248 (2009).

10.R.Z. Valiev and T.G. Langdon : Principles of equal-channel angular pressing as a processing tool for grain refinement. Prog. Mater. Sci. 51, 881 (2006).

11.Y. Fukuda , K. Oh-ishi , M. Furukawa , Z. Horita , and T.G. Langdon : Influence of crystal orientation on ECAP of aluminum single crystals. Mater. Sci. Eng., A 420, 79 (2006).

13.B. Bak : How Nature Works: The Science of Self-organized Criticality (Copernicus, Springer-Verlag, New York, 1996).

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Communications
  • ISSN: 2159-6859
  • EISSN: 2159-6867
  • URL: /core/journals/mrs-communications
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×