Hostname: page-component-848d4c4894-cjp7w Total loading time: 0 Render date: 2024-06-25T16:13:11.045Z Has data issue: false hasContentIssue false
  • English
  • Français

Thermo-Mechanical Characteristics of Ti-Ni-Cu Shape Memory Alloy Fabricated by Pulse-Current Pressure Sintering Method

Published online by Cambridge University Press:  01 February 2011

Hideki Kyogoku ,
Takeshi Kadomura ,
Shinichiro Komatsu ,
Fusahito Yoshida  and
Toshio Sakuma
Hideki Kyogoku
Affiliation:
Mechanical Engineering, Kinki University, Higashihiroshima, Hiroshima 739–2116, Japan
Takeshi Kadomura
Affiliation:
Mechanical Engineering, Kinki University, Higashihiroshima, Hiroshima 739–2116, Japan
Shinichiro Komatsu
Affiliation:
Mechanical Engineering, Kinki University, Higashihiroshima, Hiroshima 739–2116, Japan
Fusahito Yoshida
Affiliation:
Mechanical Engineering, Hiroshima University Higashihiroshima, Hiroshima 739–8527, Japan
Toshio Sakuma
Affiliation:
Central Research Institute of Electric Power Industry, Komae, Tokyo 201–8511, Japan
Get access

Abstract

The Ti-Ni-Cu shape memory alloy by elemental powders was fabricated by means of a pulse-current pressure sintering method that can produce high-density sintered compacts in a very short sintering time. The fabrication conditions of Ti-Ni-Cu alloy and the influence of Cu content in Ti-Ni-Cu alloy on the tensile properties and thermo-mechanical characteristics were investigated. The relative density of the as-sintered compacts was around 97% at any Cu content. The microstructure, tensile properties and thermo-mechanical characteristics of the as-sintered compacts were improved greatly by performing a solid solution heat-treatment. The yielding behavior due to the stress-induced martensite in stress-strain curves of the alloy took place after elastic deformation at any Cu content. The deformation resistance of the alloys changed with Cu content, and it was lowest around 9at% in Cu content. The tensile strength and elongation of the alloy with Cu content around 9at% were more than 400 MPa and 6%, respectively. It was found that the thermo-mechanical behavior of the alloy becomes stable by performing cyclic deformation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 785: Symposium D – Materials and Devices for Smart Systems , 2003 , D7.6
Copyright
Copyright © Materials Research Society 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Saburi, T., “Ti-Ni shape memory alloy”, Shape Memory Materials, ed. by Otsuka, K., and Wayman, C. W., (Cambridge University Press, 1998), pp. 49–96.Google Scholar
2. Nam, T. H., Saburi, T. and Shimizu, K., Mat. Trans. JIM, 31, 1050(1990).10.2320/matertrans1989.31.1050Google Scholar
3. Nam, T. H., Hur, S. G. and Ahn, I. S., “Phase Transformation Behaviours of Ti-Ni and Ti-Ni-Cu Shape Memory Alloy Powders Fabricated by Mechanical Alloying”, Advances in Powder Metallurgy & Particulate Materials-1997, (MPIF, 1997), pp. 11.43–11.54. Google Scholar
4. Nam, T. H., Ahn, I. S., Hur, S. G. and Kang, S. H., “Martensitic Transformation Behaviours of Ti-Ni-Cu Shape Memory Alloy Powders Fabricated by Ball Milling Method”, Advances in Powder Metallurgy & Particulate Materials-1999, (MPIF, 1999), pp. 12.95–12.105.Google Scholar
5. Strnadel, B., Ishihara, T., Ohtsuka, H. and Miyazaki, S., Materials Science and Engineering A, A202, 148(1995).10.1016/0921-5093(95)09801-1Google Scholar
6. Strnadel, B., Ohtsuka, H., Ishihara, T., and Miyazaki, S., Materials Science and Engineering A, A203, 187(1995).10.1016/0921-5093(95)09881-XGoogle Scholar
7. Kyogoku, H., Tanbo, T., Komatsu, S., Watanabe, T., Yoshida, F., Sakuma, T. and Iwata, U., “Thermo-Mechanical Properties of Ti-Ni Shape memory Alloy Fabricated by Spark-Plasma Sintering”, Advances in Powder Metallurgy & Particulate Materials-2000, (MPIF, 2000), pp. 9.45–9.56. Google Scholar
8. Watanabe, T., Kyogoku, H., Yoshida, F. and Sakuma, T., Trans. Materials Research Soc. Japan, 26, 149 (2001).Google Scholar
9. Kyogoku, H., Tanbo, T., Yokota, M., Komatsu, S., Yoshida, F., Sakuma, T. and Iwata, U., “Influence of Composition on Thermo-Mechanical Properties of TiNi Shape Memory Alloy Fabricated by Spark-Plasma Sintering”, Advances in Powder Metallurgy & Particulate Materials-2001, (MPIF, 2001), pp. 7.1–7.9. Google Scholar