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Proceedings Paper

Martensite transformation and shape memory effect of NiTi-Zr high-temperature shape memory alloys
Author(s): Zhongjie J. Pu; Hsien-Kuei Tseng; Kuang-Hsi Wu
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Paper Abstract

NiTi-Zr high temperature alloys possess relatively poor shape memory properties and ductility in comparison with NiTi-Hf and NiTi-Pd alloys. During martensite transformation of the newly developed NiTi-Zr high temperature shape memory alloys (SMAs) the temperature increases along with Zr content when the Zr content is more than 10 at%. As the Zr content increases, the fully reversible strain of the alloys decreases. However, complete strain recovery behavior is exhibited by all the alloys studied in this paper, even those with a Zr content of 20 at%. Stability of the NiTi-Zr alloys during thermal cycling was also tested and results indicate that the NiTi-Zr alloys have poor stability against thermal cycling. The reasons for the deterioration of the shape memory effect and stability have yet to be determined.

Paper Details

Date Published: 22 May 1995
PDF: 8 pages
Proc. SPIE 2441, Smart Structures and Materials 1995: Smart Materials, (22 May 1995); doi: 10.1117/12.209815
Show Author Affiliations
Zhongjie J. Pu, Florida International Univ. (United States)
Hsien-Kuei Tseng, Florida International Univ. (United States)
Kuang-Hsi Wu, Florida International Univ. (United States)

Published in SPIE Proceedings Vol. 2441:
Smart Structures and Materials 1995: Smart Materials
A. Peter Jardine, Editor(s)

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