22 May 1995 Martensite transformation and shape memory effect of NiTi-Zr high-temperature shape memory alloys
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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.
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Zhongjie J. Pu, Hsien-Kuei Tseng, Kuang-Hsi Wu, "Martensite transformation and shape memory effect of NiTi-Zr high-temperature shape memory alloys", Proc. SPIE 2441, Smart Structures and Materials 1995: Smart Materials, (22 May 1995); doi: 10.1117/12.209815; https://doi.org/10.1117/12.209815
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