Materials Transactions, Vol.52 No.08 (2011) pp.1713-1715
© 2011 The Japan Institute of Metals

Superelasticity at Low Temperatures in Cu-17Al-15Mn (at%) Shape Memory Alloy

Kodai Niitsu, Toshihiro Omori and Ryosuke Kainuma

Superelasticity at temperatures between 77 K and 273 K in Cu-17Al-15Mn alloy was investigated. In this alloy, where no thermally-induced martensitic transformation appears, an excellent superelasticity with recovery strain of 8.5% was confirmed at 77 K. The critical stresses for stress-induced martensitic transformation decrease with decreasing temperature and its gradient becomes smaller at low temperatures due to the decrease of entropy change. The entropy change estimated at 77 K is -0.46 J/(mol·K), which is almost one-third of that at 221 K.

(Received 2011/4/25; Accepted 2011/5/23; Published 2011/7/13)

Keywords: martensitic phase transformation, shape memory alloy, copper alloys, heusler phases, superelasticity

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REFERENCES

1. P. G. Lingquist and C. M. Wayman: Engineering Aspects of Shape Memory Alloys, ed. T. W. Duerig, K. N. Melton, D. Stockel and C. M. Wayman, (Butterworth-Heinemann, London, 1990) p.58.
2. J. Van Humbeeck: J. Eng. Mater. Tech. 121 (1999) 98.
3. G. S. Firstov, J. Van Humbeeck and Y. N. Koval: Mat. Sci. Eng. A 378 (2004) 2.
4. K. Otsuka and X. Ren: Prog. Mater. Sci. 50 (2005) 511.
5. T. W. Duerig and R. Zadno: Engineering Aspects of Shape Memory Alloys, ed. T. W. Duerig, K. N. Melton, D. Stockel and C. M. Wayman, (Butterworth-Heinemann, London, 1990) p.369.
6. V. I. Nikolaev, S. A. Pul'nev, G. A. Malygin, V. V. Shpeizman and S. P. Nikanorov: Phys. Solid State. 49 (2007) 1878.
7. R. Kainuma, S. Takahashi and K. Ishida: J. Phys. IV 5 (1995) 961.
8. R. Kainuma, S. Takahashi and K. Ishida: Metall. Mater. Trans. A 27A (1996) 2187.
9. Y. Sutou, T. Omori, R. Kainuma, N. Ono and K. Ishida: Metall. Mater. Trans. A 33A (2002) 2817.
10. Y. Sutou, T. Omori, K. Yamauchi, N. Ono, R. Kainuma and K. Ishida: Acta Mater. 53 (2005) 4121.
11. Y. Sutou, T. Omori, R. Kainuma and K. Ishida: Mater. Sci. Tech. 24 (2008) 896.
12. M. Ishibashi, N. Tabata, T. Suetake, T. Omori, Y. Sutou, R. Kainuma, K. Yamauchi and K. Ishida: J. Dermatol. Treat. 19 (2008) 291.
13. S. Ii, K. Tsuchiya and T. Koyano: Proc. 8th European Symposium on Martensitic Transformation (ESOMAT 2009), (2009) p.02011.
14. G. Zak, A. C. Kneissl and G. Zatulskij: Scr. Mater. 34 (1996) 363.
15. K. Otsuka, H. Sakamoto and K. Shimizu: Acta Metall. 27 (1979) 585.
16. T. Omori, Y. Sutou, N. Tabata, R. Kainuma and K. Ishida: J. Japan Res. Inst. Adv. Copper-Base Mater. Technol. (JRI Cu) 50 (2011) to be published.
17. Y. Sutou, T. Omori, R. Kainuma, N. Ono and K. Ishida: Metall. Mater. Trans. A 33A (2002) 2817.
18. Y. Araki, T. Endo, T. Omori, Y. Sutou, Y. Koetaka, R. Kainuma and K. Ishida: Earthquake Eng. Struct. Dynam. 40 (2011) 107.
19. P. P. Rodriquez, R. B. Perez-Saez, V. Recarte, J. M. San Juan, O. A. Ruano and M. L. No: REVISTA DE METALURGIA 37 (2001) 194.

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