Materials Transactions Online

Materials Transactions, Vol.47 No.03 (2006) pp.787-791
© 2006 The Japan Institute of Metals

Effect of Cold Working on Transformation and Deformation Behavior after Pre-Deforming in Ti–50 at%Ni Shape Memory Alloy

Toshio Sakuma1, Yuji Mihara2, Hirotada Toyama3, Yasuo Ochi4 and Kiyosi Yamauchi5

1Department of Human Welfare Engineering and Assistive Technology, Oita University, Oita 870-1192, Japan
2Piping Engineering Center, Chiyoda Co., Yokohama 230-8601, Japan
3Department of Mechanical Engineering and Intelligent Systems, Graduate School of Engineering, University of Electro-Communications, Chofu 182-8585, Japan
4Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications, Chofu 182-8585, Japan
5Biomedical Engineering Research Organization, Tohoku University, Sendai 980-8579, Japan

It is reported that the transformation characteristics of Ti–Ni shape memory alloys (SMAs) are influenced by manufacturing conditions, such as composition, heat-treatment temperature, cold working, and so on. To understand correctly the effects of these manufacturing conditions on transformation characteristics of Ti–Ni SMAs make it possible to control the transformation temperature and recovery stress. The purpose of this work is to clarify the effect of cold working ratio on transformation and deformation behavior after pre-deforming SMA. The specimens were Ti–50 at%Ni annealed at 673 K for 3.6 ks. The variation of the recoverable strain, recovery stress and transformation temperature with cold working ratio was investigated experimentally. The solution treated material was also used as a reference material. The effect of cold working ratio on the transformation and deformation behavior is discussed in relation to the volume fraction of the residual martensite subjected to slip deformation.

(Received 2005/9/20; Accepted 2005/12/15; Published 2006/3/15)

Keywords: shape memory alloy, titanium–50 at%nickel, cold working, pre-deformation, transformation and deformation behavior

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REFERENCES

  1. S. Miyazaki, T. Sakuma and T. Shibuya: Properties and Application Development of Shape Memory Alloy (CMC, Japan 2001) 233–260.
  2. T. Honma: J. Jpn. Soc. Mech. Eng. 87 (1984) 517–522.
  3. K. Yamauchi: Jpn. Inst. Met. 7 (1993) 495–499.
  4. M. Miyagi: Jpn. Inst. Met. 24 (1985) 69–74.
  5. T. Saburi: Metals and Technology 59 (1989) 11–18.
  6. S. Miyazaki and H. Sakamoto: Jpn. Inst. Met. 24 (1985) 33–44.
  7. T. Todoroki and H. Tamura: J. Jpn. Inst. Met. 50 (1986) 538–545.
  8. T. Sakuma, M. Hosogi, N. Okabe, U. Iwata and K. Okita: Mater. Trans. 43 (2002) 815–821.
  9. T. Sakuma, M. Hosogi, N. Okabe, U. Iwata and K. Okita: Mater. Trans. 43 (2002) 828–833.
  10. S. Miyazaki: J. Mater. Sci. Soc. Jpn. 27 (1990) 59–67.
  11. M. Piao, K. Otsuka, S. Miyazaki and H. Horikawa: Mater. Trans., JIM 34 (1993) 919–929.
  12. H. G. Yong and C. M. Wayman: Acta Met. 22 (1974) 887–896.
  13. G. B. Olson and M. Cohen: Scr. Met. 9 (1975) 1247–1254.


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