The temperature,duration,activation energy,and Avrami exponent of the solid phase transformationβ_(1)→α+β_(2) of TC4 titanium alloy treated at 3 GPa in a cooling process are calculated by means of differential scanning calorimetric curves.Then the effects of high pressure on theβ_(1)→α+β_(2) phase transformation dynamics of TC4 alloy in a cooling process are investigated.The results show that 3 GPa high pressure treatment can increase the activation energy of the TC4 alloy.The beginning time,end time,and duration of theβ_(1)→α+β_(2) phase transition of the 3 GPa high pressure treated TC4 alloy at the cooling rate of 10℃/min are increased by 2.90℃,7.78℃ and-29.28 s respectively.It is known that 3 GPa high pressure treatment has little effect on the phase transition mechanism.
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