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Effect of Nitrogen on Shape Memory Behaviour of FE-MN-SI-CR-NI Alloys

Published online by Cambridge University Press:  10 February 2011

A. Ariapour ,
D. D. Perovic  and
A. Mclean
A. Ariapour
Affiliation:
Department of Metallurgy and Materials Science, University of Toronto, Toronto, Ontario, Canada, M5S 3E4
D. D. Perovic
Affiliation:
Department of Metallurgy and Materials Science, University of Toronto, Toronto, Ontario, Canada, M5S 3E4
A. Mclean
Affiliation:
Department of Metallurgy and Materials Science, University of Toronto, Toronto, Ontario, Canada, M5S 3E4
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Abstract

The composition of an Fe-Mn-Si-Cr-Ni stainless steel with shape memory effect was altered in this work in order to increase the strength of the alloy. The alloy possessed a low yield strength which is a major draw back for structural applications.

Nitrogen alloying, using nitrogen pressurized melting (P=l–10 atm), was employed to introduce a nitrogen concentration of up to 0.36 wt%. The effect of nitrogen alloying on shape memory effect was studied through mechanical testing. It was found that nitrogen alloying increased the hardness; however, nitrogen as an interstitial alloying element suppressed the γ⇒ε transformation and therefore decreased the shape memory effect.

Introducing small amount of Nb (e. g., 0.36 wt%) to the nitrogen containing alloys caused formation of NbN. The NbN compound was in the form of globular dispersed particles (200 nm) which increased the strength of the alloy without significantly changing the shape memory effect.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 459: Symposium Y – Materials for Smart Systems II , 1996 , 357
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Enami, K., Nagasawa, A., and Nenno, S.; Scripta Metall., 9, 1975, 941.Google Scholar
2. Sato, A., Chishiama, E., Soma, K., and Mori, T.; Acta Metall., 30, 1982, 1177.Google Scholar
3. Murakami, M., Otsuka, H., Suzuki, H., and Matsuda, Sh.; Trans. ISIJ, 27, 1987, B88–B89.Google Scholar
4. Gu, Q., Van Humbeeck, J., and Deleay, L.; Scripta Metall., 30 (2), 1994, 1587.Google Scholar
5. Otsuka, H., Yamada, H., Maruyama, T., Tanahashi, H., Matsuda, Sh., and Murakami, M., ISIJ Int., 30, 1990, 674.Google Scholar
6. Pickering, E. B.; “Physical Metallurgy and the Design of Steels”, Appl. Sci. Pub., 1978, p. 23.Google Scholar
7. Truman, J. E., Coleman, M. J. and Pirt, K. K., Corrosion J., 12, 1977, p. 236.Google Scholar
8. Eckenrod, J. J., Konach, C. W.; ASTM, 679, 1979, p. 17.Google Scholar
9. Simmons, J. W., Atteridge, D. G., and Rawers, J. C.; Corrosion, 45, 1994, p. 491.Google Scholar
10. Jian, L., Wayman, C. M.; Scripta Metall., 27, 1992, p. 279.Google Scholar
11. Schramm, R. E. and Reed, R. P.; Met. Trans., 6A, 1975, p.1345.Google Scholar
12. Jones, E., Datta, T., Almasan, C., Edwards, D., Ledbetter, H. M.; Mat. Sci and Eng., 91, 1987, p. 181.Google Scholar
13. Gartstein, E. and Rabinkin, A.; Acta Met., 27, 1979, p. 1053.Google Scholar
14. Leslie, W. C., in “The Physical Metallurgy of Steels”, McGraw-Hill, 1981, 316.Google Scholar