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High-Temperature Shape Memory Effect of Ti-(Pt,Ir)

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Abstract:

Shape recovery and superelasticity of Ti-50at%Pt and Ti-50at%(Pt, Ir), whose martensitic transformation temperature are above 1273 K, were investigated by thermal expansion measurement in dilatometer and loading-unloading compression test. The shape recovery was found in all compounds in at least one of the testing methods. The highest shape recovery, about 4% was found in Ti-25Pt-25Ir using loading-unloading compression test. On the other hand, superelasticity was found in only ternary compounds. Larger superelasticity was observed in ternary compounds with higher Ir contents. Potential of Ti-50Pt and Ti-50(Pt, Ir) as high-temperature shape memory alloys is discussed.

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Periodical:

Materials Science Forum (Volumes 539-543)

Pages:

3273-3278

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.3273

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Online since:

March 2007

Authors:

Yoko Yamabe-Mitarai, Toru Hara, Seiji Miura, Hideki Hosoda

Keywords:

B19, B2, Martensitic Transformation (MT), PtTi, Shape-Recovery, Superelasticity

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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