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Crystallographic Characteristics of Shape Memory Alloys

Published online by Cambridge University Press:  24 March 2011

Madangopal Krishnan
Madangopal Krishnan*
Affiliation:
Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
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Abstract

The martensitic microstructure of shape memory alloys is an aggregate of self accommodating plate groups. The principal character of this aggregate is its demonstration of pseudoplasticity, wherein a macroscopic shape change is brought about by extensive rearrangement and reorientation of the self accommodating martensite variants, and that of microstructural reversibility, wherein the polyvariant microstructure transforms back to the original grain of the parent phase after pseudoplastic deformation. These aspects of the shape memory intermetallic alloys are intriguing and, to a great extent, unsolved. The aim of this paper is to show that the underlying crystallographic interrelationships of the self accommodating microstructure of intermetallic alloys are responsible for the observed effect. The paper will discuss the relation between autocatalytic nucleation and self accommodation, the relation between microstructural reversibility and intervariant interfaces of the martensitic microstructure and the manifestations of microstructural irreversibility using results from the microstructural examination of the self accommodating microstructures.

Keywords

microstructurenucleation & growthphase transformation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1295: Symposium N – Intermetallic-Based Alloys for Structural and Functional Applications , 2011 , mrsf10-1295-n01-01
Copyright
Copyright © Materials Research Society 2011

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References

REFERENCES

1. Wayman, C.M., Scripta Metall., l5, 489(1971).Google Scholar
2. Miyazaki, S., Otsuka, K. and Wayman, C.M., Acta Metall., 37, 1873(1989).Google Scholar
3. Saburi, T. and Nenno, S., Proc. of the Int. Conf. On Solid-Solid Phase Transformations, eds. Aaronson, H.I., Laughlin, D.E., Sekerka, R.F. and Wayman, C.M., (TMS-AIME, Warrendale, 1982), pp.1429.Google Scholar
4. Tas, H., Delaey, L. and Deryuttere, A., Metall. Trans., 4, 2833(1973).Google Scholar
5. Madangopal, Krishnan, Acta Mater., 45, 5347(1997).Google Scholar
6. Bokros, J.C. and Parker, E.R., Acta Metall., 11, 1291(1963).Google Scholar
7. Srivastava, D., Madangopal, K., Banerjee, S. and Ranganathan, S., Acta Metall. et Mater., 41, 3445(1993).Google Scholar
8. Pancholi, V., Madangopal, Krishnan, Samajdar, I., Yadav, V., and Ballal, N.B., Acta Mater., 56, 2037(2008).Google Scholar
9. Sontakke, P., Gupta, A., Hiwarkar, V., Krishnan, M. and Samajdar, I., Proc. of the Int. Conf. on Martensitic Transformations. (ICOMAT-08), eds. Olson, G.B., Lieberman, D.S. and Saxena, A., (TMS, 2009), pp.549–554.Google Scholar
10. Madangopal, K., Singh, J. and Banerjee, S., Scripta Metall. et Mater., 25, 2153(1991).Google Scholar
11. Eshelby, J.D., Proc. R. Soc. of Lond., A252, 561(1959).Google Scholar
12. Ling, H.C. and Owen, W.S., Acta Metall., 29, 1721(1981).Google Scholar
13. Liu, Y. and Xie, Z.L., Acta Mater., 51, 5529(2003).Google Scholar
14. Madangopal, K., Tewari, R. and Banerjee, S., Scripta Metall. et Mater., 28, 991(1993).Google Scholar
15. Goo, E., Deurig, T., Melton, K. and Sinclair, R., Acta Metall., 3, 1725(1985).Google Scholar
16. Paxton, A.T., Acta Metall. et Mater., 43, 2133(1995).Google Scholar
17. Madangopal, Krishnan and Maji, Bikas C., Phil. Mag. Lett., 81, 243(2001).Google Scholar
18. Christian, J.W. and Mahajan, S., Prog. Mater. Sci., 39, 20(1995).Google Scholar
19. Basak, C.B., Sarkar, S., Krishnan, M. and Saha-Dasgupta, T., unpublished work Google Scholar
20. Boiling, G. F. and Richman, R. H., Acta Metall., 13, 745(1965).Google Scholar
21. Li, S., Yamauchi, K., Maruhashi, Y. and Nishida, M., Scripta Mater., 49, 723(2003).Google Scholar
22. Bilby, B.A. and Crocker, A.G., Proc. R. Soc. of Lond., A240, 288(1965).Google Scholar
23. Eshelby, J.D., Proc. R. Soc. of Lond., A241, 376(1957).Google Scholar