Isothermal nature of the B2–B19′ martensitic transformation in a Ti–51.2Ni (at.%) alloy

The B2–B19′ transformation in Ti–51.2Ni (at.%) alloy exhibits a clear time dependence. The transformation starts after an incubation time when the specimen is held above Ms, and proceeds while holding in the temperature range between 160 and 100 K. The nose temperature is expected to be near 130 K. The reverse transformation also shows a clear time dependence.