Study on the superplastic deformation of the TC6 alloy

The deformation behavior of the TC6 alloy at high temperature has been investigated using tensile tests. By SEM technology, the fracture mechanism has been analyzed through the morphologies of the failure surface. The experimental results show that: (1)the increase of deformation temperature and the decrease of strain rate are propitious to the improvement of the deformation ability of the TC6 alloy; (2) the optimal process parameters are the combination of 950°C and 0.001 s^-1, and the largest elongation ratio can reach 267%; (3) the tough fracture is the main mode during the fracture procedure of the TC6 alloy; (4) the fracture begins from the inclusions, and with the increment of deformation temperature and the decrement of strain rate, the much more tough fracture characteristic becomes more obvious.