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The Effect of Hafnium and Thermal Cycling on the Transformation Temperatures of NiTi-Based Shape Memory Alloys

Published online by Cambridge University Press:  15 February 2011

Paul E. Thoma  and
John J. Boehm
Paul E. Thoma
Affiliation:
Johnson Controls, Inc., Corporate Technology, P.O. Box 591, Milwaukee, WI 53201-0591 USA
John J. Boehm
Affiliation:
Johnson Controls, Inc., Corporate Technology, P.O. Box 591, Milwaukee, WI 53201-0591 USA
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Abstract

The effect of thermal cycling on the austenite to martensite (A→M) and martensite to austenite (M→A) transformation temperatures (TTs) of Ni49.8Ti50.2 and Ni49.8Ti40.2Hf10 shape memory alloys is investigated. Test specimens are from arc melted buttons homogenized at 900°C for 100 hours. Results show that the A→M and M→A TTs for the alloys decrease with increasing number of thermal cycles through the phase transformations. The A→M TT of the NiTiHf alloy stabilizes more quickly than the A→M TT of the NiTi alloy when cycled. However, the M→A TT of the binary NiTi alloy stabilizes more quickly than the M→A TT of the NiTiHf alloy when cycled.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 604: Symposium LL – Materials for Smart Systems III , 1999 , 221
Copyright
Copyright © Materials Research Society 2000

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References

1 Kao, M., Schmitz, D., Thoma, P., Klaus, M., and Angst, D., 5th International Conference on New Actuators (Actuator 96, Bremen, Germany, 1996), Borgmann, H. Ed., AXON Technologie Consult GmbH, Bremen, Germany, 1996, Paper No. 5.3, pp. 370–374.Google Scholar
2 Thoma, P.E., Blok, A.M., and Kao, M.Y., Shape-Memory Materials and Phenomena — Fundamental Aspects and Applications, Liu, C.T., Kunsmann, H., Otsuka, K., and Wuttig, M. Eds., (MRS Proceedings, Vol. 246, Pittsburgh, PA, 1992), pp. 321–330.Google Scholar
3 Zhang, C., Zee, R.H., Thoma, P.E., and Boehm, J.J., Phase Transformations and Systems Driven Far from Equilibrium, Ma, E., Atzmon, M., Bellon, P., and Trivedi, R. Eds., (MRS Proceedings, Vol. 481, Warrendale, PA, 1998), pp. 237–242.Google Scholar
4 Thoma, P.E., Zhang, C., Boehm, J.J., and Zee, R.H., IVth European Symposium on Martensitic Transformations (ESOMAT'97, Enschede, The Netherlands, 1997), Beyer, J., Bottger, A., and Mulder, J.H. Eds., Journal de Physique IV, Colloque C5, Supplement au Journal de Physique III, n°l1, Volume 7, Novembre 1997, pp. C5–483.Google Scholar
5 AbuJudom, D.N. II, Thoma, P.E., Kao, M.Y., Angst, D.R., Patent, U.S. No. 5,114,504, May 19, 1992.Google Scholar
6 Angst, D.R., Thoma, P.E., and Kao, M.Y., International Conference on Martensitic Transformations (ICOMAT 95, Lausanne, Switzerland, 1995), Gotthardt, R. and Van Humbeeck, J. Eds., Journal de Physique IV, Colloque C8, Supplément au Journal de Physique III, n°12, Volume 5, Decembre 1995, pp. C8–747.Google Scholar
7 Thoma, P.E. and Boehm, J.J., “Effect of Composition on the Amount of Second Phase and Transformation Temperatures of NixTi90-xHf10 Shape Memory Alloys”, International Conference on Martensitic Transformations (ICOMAT 98, San Carlos de Bariloche, Patagonia, Argentina, 1998). Proceedings to be published by Elsevier in Materials Science and Engineering A.Google Scholar
8 Zhang, C., Zee, R.H., and Thoma, P.E., International Conference on Displacive Phase Transformations and Their Applications in Materials Engineering (Urbana, IL, USA, 1996), Inoue, K., Mukherjee, K., Otsuka, K., and Chen, H. Eds., The Minerals, Metals & Materials Society, Warrendale, PA, 1998, pp. 267–274.Google Scholar
9 Zhu, Y.R., Pu, Z.J., Li, C., and Wu, K.H., The International Symposium on Shape Memory Materials (Beijing, China, 1994), Youyi, C. and Hailing, T. Eds., International Academic Publishers, Beijing, China, 1994, pp. 253–257.Google Scholar
10 Xiaodong, H., Zhifang, Z., Tongchun, L., Junting, L., and Dazhi, Y., The International Symposium on Shape Memory Materials (Beijing, China, 1994), Youyi, C. and Hailing, T. Eds., International Academic Publishers, Beijing, China, 1994, pp. 258–262.Google Scholar
11 Zhang, C., Thoma, P., Chin, B., and Zee, R., 3rd International Workshop on Ordered Intermetallic Alloys and Composites (IWOIAC, Hangzhou, China 1998), Lin, T.L., Liu, C.T., and Sass, S.L. Eds., Transactions of Nonferrous Metals Society of China, Special Issue, June 1999, pp. 55–64.Google Scholar