[PDF] Top 20 Effect of Pre Strain on Transformation and Deformation Behavior in Ti–50 at%Ni Shape Memory Alloy

... recovery deformation and the recovery force by their shape memory effects, it is necessary to deform them in martensitic phase, and after that, to recover them by heating, then, to use their recovery ... See full document

... the transformation characteristics of Ti–Ni shape memory alloys (SMAs) are influenced by manufacturing conditions, such as composition, heat-treatment temperature, cold working, and so ... See full document

... the transformation and deformation behavior of a shape memory alloy has been investigated by many ...plastic deformation of shape memory ...plastic ... See full document

... Elastic deformation (A!B), reorientation of the martensite variants (B!C), and work hardening (C!D) ...occurred. Pre-strain is the total strain from A to D at a strain rate of ... See full document

... of Ti-Ni-Zr high-temperature shape memory alloy by powder metallurgy (P/M) ...and shape memory characteristics of Ti-50.2 mol%Ni-5 mol%Zr alloy were ... See full document

... the 50 Ti alloy, all aged specimens exhibited almost the same transformation temperature compared with that of solution-treated specimen, which is consistent with the fact that the aging ... See full document

... the shape memory behavior. Strain was measured under constant stresses during the thermal cycling and then so- called strain-temperature curves were ...The transformation ... See full document

... of shape memory alloys, that is, the SMA joint should keep up the prescribed function at the storage temperature and reproduce the prescribed function in the normal usage ...the Ti/Ni ratio, ... See full document

... Ti–22Nb–2.0O alloy. This fracture stress is the highest one among solution-treated Ti-based type shape memory alloys which have been investigated to ...The Ti– ...the ... See full document

... of Ni-Ti alloys in solution environments is lower than that of titanium and titanium alloys (Shabalovskaya 2001; Ogawa et ...of Ni-Ti alloys in solution environments can degrade the mechanical ... See full document

... which is referred to as condition B hereinafter. They were solution-treated at 1273 K for 3.6 ks, and then quenched into ice water. Subsequently, the specimens were aged at 773 K for various periods, and then quenched ... See full document

... reverse transformation occurred, also inhomogeneous and related to the significant temperature ...various strain rates, an influence of the strain rate on the mechanical behavior was ... See full document

... the Ni/Ti ratio, heat treatment condition and cold working ...the alloy with Nb content of 6 mol% and Ni/Ti atomic ratio being less than ...fracture strain reached about 1,000 ... See full document

... Changes on the hysteresis width and on the slope of the hysteresis cycles were observed during the mechanical cy- cling of Cu–Zn–Al single crystal of electronic concentration 1.48 e / a (Fig. 2). In the INSTRON testing ... See full document

... The Ni–Ti thin films were deposited in the Institute of Ap- plied Physics at EPFL by rf magnetron sputtering on unheated rotating glass substrates at a temperature estimated to be ap- proximately 450 K due ... See full document

... exact transformation temperature region of a kind of R-phase transformation itself in this alloy should be investigated by in-situ TEM observations before and after the transformation and ... See full document

... Shape memory alloys (SMAs) have been considered for some years for practical applications in various environments due to their capacity to recover the shape they had before a plastic ... See full document

... martensitic transformation was not ...martensitic transformation in NiTi becomes broadened by severe plastic deformation such as cold rolling 24,25) and the martensitic transformation ... See full document

... how transformation proceeds with different aging ...the effect of aging on succes- sive martensitic transformation in near-equiatomic Ti-rich Ti– Pd ...in Ti-rich side is ... See full document

... of Ti–Ni–Cu–Mo alloys, tensile tests were made at Af temperature, and the stress-strain curves obtained are shown in ...of Ti–Ni–Cu alloys fully an- nealed at 1123 K are also ...a ... See full document