High-Temperature Shape Memory Effect of Ti-(Pt,Ir)
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.
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Y. Yamabe-Mitarai et al., "High-Temperature Shape Memory Effect of Ti-(Pt,Ir)", Materials Science Forum, Vols. 539-543, pp. 3273-3278, 2007