Effects of Rotary Swaging on Mechanical Properties of Powder Metallurgy V-5Cr-5Ti Alloy
V-5Cr-5Ti alloy has good resistance to irradiation and dimensional stability. It is a good structural material for the first wall of fusion reactor. But the V-5Cr-5Ti alloy prepared directly by powder metallurgy method can not reach the mechanical properties for the engineering requirements. Therefore, the effects of rotary swaging on the mechanical properties of powder metallurgy V-5Cr-5Ti alloy were studied. Rotary forging experiments were conducted in 1050℃ and 1200 ℃ respectively. And then annealing was at 1050℃. The results show that the tensile strength is 470 MPa, yield strength is 337 MPa, the elongation is 24.2%, density is 99.3% after the rotary swaging at 1200℃ and annealing at 1050℃. The metallographic analysis discovers that the microstructure at the state is uniform and its grain size reaches 10 classes. There are Ti-rich and Cr-rich solid solution region in fracture zone of sample. The brittle fracture region of the sample is mainly Ti(CON) phase and the ductile fracture region is mainly V-rich alloy zone.