Effects of 3 GPa High Pressure Treatment on the β1→α + α2 Phase Transition Dynamics of TC4 Titanium Alloy.

(Received 11 December 2012) The temperature, duration, activation energy, and Avrami exponent of the solid phase transformation β1→ α + α2 of TC4 titanium alloy treated at 3GPa in a cooling process are calculated by means of differential scanning calorimetric curves. Then the effects of high pressure on the β1→α + α2 phase transformation dynamics of TC4 alloy in a cooling process are investigated. The results show that 3GPa high pressure treatment can increase the activation energy of the TC4 alloy. The beginning time, end time, and duration of the β1→α + α2 phase transition of the 3GPa high pressure treated TC4 alloy at the cooling rate of 10°C/min are increased by 2.90°C, 7.78°C and -29.28 s respectively. It is known that 3GPa high pressure treatment has little effect on the phase transition mechanism. [ABSTRACT FROM AUTHOR]