Effect of Temperature on Critical Stress for Slip of Ti-Ni Shape Memory Alloy

Abstract:

This study describes the effect of temperature on critical stress for slip of Ti-Ni shape memory alloy. Tensile loading-unloading tests has been carried out using Ti-50.3at%Ni in the temperature range from 193K to 423K in order to investigate the temperature dependence of critical stress for slip of Ti-Ni shape memory alloy. The critical stress for slip is different in the three regions which are the martensitic single phase state in the range of 193K-273K, the mixture state of the martensitic and parent phases in the range of 273K-373K and the parent single phase state in the range of 373K-423K. The critical stress for slip of the martensitic single phase is about 200MPa. In the case of the mixture state of the martensitic and parent phases, the critical stress for slip increases with increasing temperature, and reaches the maximum stress of 652MPa at 373K. The critical stress for slip of the parent phase decreases with increasing temperature.

• Periodical: Materials Science Forum (Volume 687)
• Pages: 480-484
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.687.480
• Online since: June 2011
• Authors: Takaei Yamamoto, Hiroki Cho, Toshio Sakuma
• Keywords: Critical Stress For Slip, Shape Memory Alloy Actuator, Temperature, Ti-Ni

References

[1] T. Honma, J. Jpn. Soc. Mech Eng., Vol. 87 (1984), p.517.

[2] S. Miyazaki，T. Sakuma and T. Shibuya: properties and Application Development of Shape Memory Alloy (CMC, Japan 2001).

[3] K. Yamauchi, Jpn. Inst. Met. , Vol. 7 (1993), p.495.

[4] M. Miyazaki, Jpn. Inst. Met. , Vol. 24 (1985), p.69.

[5] T. Honma, J. Jpn. Soc. Mech. Eng., Vol. 87, 786 (1984), p.786.

[6] K. Yamauchi, J. Jpn. Soc. Mech. Eng., Vol. 32 (1993), p.495.

[7] I. Okata, J. Jpn. Soc. Mech. Eng., 107-1028, 26-29 (2004).

[8] Y. Okamoto, The stomatological Society., Japan, Vol. 55 (1988), p.5.