Effect of the Heat Treatment after Cold Working on the Phase Transformations in Ti-Ni Alloys

Thermal Cycling Effects in an Aged Ni-rich Ti–Ni Shape Memory Alloy

“…For example, a doublet peak is seen in the DSC curve obtained upon heating after the thermal cycling of 104 times. The shoulder peak at higher temperatransformation sequences have also been reported by Todoroki et al (14) in Ti-Ni alloys annealed after cold working. The variation of DSC curves for the specimens subjected to the thermal cycling after aging at 723K for 3.6ks was quite similar to that shown in Fig.…”

Stress serration and arch-shaped Lüders stress plateau behaviour of Ti–50.8 at% Ni wire prepared by selective electrical resistance over-aging

“…These alloys generally exhibit limited pseudoelastic behavior under partially annealed conditions and perfect shape memory behavior when fully recrystallized. For Ni-rich NiTi alloys, the dominant effect is related to the process of precipitation ageing, which is influenced by alloy composition, ageing temperature and ageing time [6,[17][18][19][20]. These alloys generally exhibit superior pseudoelasticity under well aged conditions.…”

Generation and control of two way shape memory effect for SMA coil spring

“…2, indicating that the specimens heat treated at 450 and 500℃ experience B2→R→M transformation on cooling. However, B2→M transformation take place in the specimens heat treated at higher temperatures, because no work hardening effect is left [3].…”