Influence of the Crystallographic Orientation of CuZn30 Single Crystal on the Portevin-Le Chatelier Effect

Abstract:

Plastic deformation of solid crystals is a complex process, mostly heterogeneous, due to the simultaneous effect of several deformation mechanisms. A dominating deformation mechanism depends on the properties of the material and external coefficients, viz. temperature, stress and strain rate. The applied Bridgman method permitted to obtain single crystal of the CuZn30 alloy adequate for plastic deformation investigations. Single crystal are characterized by selected crystallographic orientations from various areas of the basic triangle. In order to determine the influence of the crystallographic orientation on the Portevin-Le Chatelier effect selected single crystals were compressed at a temperature of 300°C at a strain rate of 10-3 s-1. Experiments confirmed the effect of the crystallographic orientation axis of CuZn30 single crystals on the observed differences in the intensity of stress oscillation on stress-strain curves.

• Periodical: Solid State Phenomena (Volumes 203-204)
• Pages: 406-410
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.203-204.406
• Online since: June 2013
• Authors: Barbara Grzegorczyk, Wojciech Ozgowicz, Elżbieta Kalinowska-Ozgowicz
• Keywords: Copper Alloy, Plastic Deformation, PLC Effect, Single Crystal, Tensile Test at Elevated Temperature

References

[1] A. H. Cottrell: A note on the Portevin–Le Chatelier effect Philos, Mag. 44, (1953), p.829

[2] H. Paul, A. Morawiec, J.H. Driver, E. Bouzy: On twinning and shear banding in a Cu–8 at.% Al alloy plane strain compressed at 77 K, International Journal of Plasticity 25 (2009), p.1588

DOI: 10.1016/j.ijplas.2008.10.003

[3] Y. Estrin, L.P. Kubin: Plastic instabilities: phenomenology and theory, Materials Science and Engineering: A, Volume 137 (1991), p.125

DOI: 10.1016/0921-5093(91)90326-i

[4] A. Portevin, F. Le Chatelier: Sur un phénomène observé lors de l'essai de traction d'alliages en cours de transformation, Comptes Rendus de l'Académie des Sciences Paris 176, (1923) p.507

[5] B.J Brindley, P.J Worthington: Serrated yielding in Aluminium-3% Magnesium Acta Metallurgica, Vol.17, Issue 11, (1969), p.1357

DOI: 10.1016/0001-6160(69)90153-9

[6] B. Grzegorczyk, W. Ozgowicz, E. Kalinowska-Ozgowicz, A. Kowalski, P. Pałka: Metallographic aspects of deformed single crystals of CuZn30 alloys Archives of Materials Science Vol.54, Issue 1 (2012), p.29

DOI: 10.4028/www.scientific.net/ssp.231.49

[7] U. Messerschmidt, M. Bartsch, Ch. Dietzsch: The flow stress anomaly in Fe–43at%Al single crystals, Intermetallics 14 (2006), p.607

DOI: 10.1016/j.intermet.2005.10.009

[8] A. Cuniberti, Serrated yielding in long-range ordered 18R Cu–Zn–Al single crystals Intermetallics 14 (2006), p.776

DOI: 10.1016/j.intermet.2005.11.011

[9] A. Onyszko, W. Bogdanowicz, J. Sieniawski "Structural perfection of a single crystal nickel-based CMSX-4 superalloy ", Solid State Phenomena, Vol. 186 (2012), p.151

DOI: 10.4028/www.scientific.net/ssp.186.151

[10] Z. Jasieński, A. Piątkowski: Ranges of hardening curve orientation of single crystals of aluminum [135] and [113] in terms of heterogeneity of deformation, Archives of Metallurgy Vol.19, Issue 1, (1974), pp.111-130 (in Polish).

[11] A. Piątkowski: The influence of heterogeneity of deformation on course of work hardening of tension single crystals of aluminium and the copper, PhD thesis, Cracow, 1987 (in Polish).

[12] PN-EN 12163:2011 Miedź i stopy miedzi - Pręty ogólnego przeznaczenia (Copper and copper alloys — Rod for general purposes)