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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

1.Portevin, A. and Le Chatelier, F.: On a phenomenon observed in the tensile testing of alloys during processing. Compt. Rend. Acad. Sci. Paris 176, 507 (1923).Google Scholar
2.Chinh, N.Q., Gubicza, J., Kovács, Zs., and Lendvai, J.: Depth sensing indentation tests in studying plastic instabilities. J. Mater. Res. 19, 31 (2004).Google Scholar
3.Schwink, Ch. and Nortmann, A.: The present experimental knowledge of dynamic strain ageing in binary f.c.c. solid solutions. Mater. Sci. Eng., A 234–236, 1 (1997).Google Scholar
4.Chmelík, F., Ziegenbein, A., Neuhäuser, H., and Lukac, P.: Investigating the Portevin-Le Chatelier effect by the acoustic emission and laser extensometry techniques. Mater. Sci. Eng., A 324, 200 (2002).CrossRefGoogle Scholar
5.Lebyodkin, M., Brechet, Y., Estrin, Y., and Kubin, L.P.: Statistics of the catastrophic slip events in the Portevin-Le Chatelier effect. Phys. Rev. Lett. 74, 4758 (1995).Google Scholar
6.Cottrell, A.H.: A note on the Portevin-Le Chatelier effect. Philos. Mag. 44, 829 (1953).CrossRefGoogle Scholar
7.Mondolfo, L.F.: Structure of the aluminium:magnesium:zinc alloys. Int. Metall. Rev. 153, 95 (1971).Google Scholar
8.Sha, G. and Cerezo, A.: Kinetic Monte Carlo simulation of clustering in an Al-Zn-Mg-Cu alloy (7050). Acta Mater. 53, 907 (2005).CrossRefGoogle Scholar
9.Chinh, N.Q., Gubicza, J., Czeppe, T., Lendvai, J., Xu, C., Valiev, R.Z., and Langdon, T.G.: Developing a strategy for the processing of age-hardenable alloys by ECAP at room temperature. Mater. Sci. Eng., A 516, 248 (2009).Google Scholar
10.Valiev, R.Z. and Langdon, T.G.: Principles of equal-channel angular pressing as a processing tool for grain refinement. Prog. Mater. Sci. 51, 881 (2006).CrossRefGoogle Scholar
11.Fukuda, Y., Oh-ishi, K., Furukawa, M., Horita, Z., and Langdon, T.G.: Influence of crystal orientation on ECAP of aluminum single crystals. Mater. Sci. Eng., A 420, 79 (2006).Google Scholar
12.Bougherira, Y., Entemeyer, D., Fressengeas, C., Kobelev, N.P., Lebedkina, T.A., and Lebyokin, M.A.: The intermittency of plasticity in an Al3%Mg alloy. J. Phys.: Conf. Ser. 240, 012009 (2010).Google Scholar
13.Bak, B.: How Nature Works: The Science of Self-organized Criticality (Copernicus, Springer-Verlag, New York, 1996).CrossRefGoogle Scholar