Abstract
TC4 titanium alloy powder was made into the test piece by spark plasma sintering. The hot deformation of TC4 titanium alloy was performed on the Gleeble-1500 experiment machine. The effects of microstructure were studied. The results show that the number of passes increased with the increasing of the relative density at the same amount of deformation. The relative density have an important influence in one-pass deformation. At the deformation temperature of 950°C and a strain rate of 0.1s-1, the microstructure of TC4 titanium alloy was the weave-basket structure, and the widmanstatten structure existed. The increase in the number of passes could promote the growth of dynamic recrystallization grains under the same amount of deformation.
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