Thermal Deformation Behavior of Low-cost Super High Strength Titanium Alloys and Determination of Their Forging Process

Low-cost titanium alloys (Ti-xFe-3Al) with super high strength were prepared by using low-cost alloying elements, iron and carbon, instead of higher cost vanadium element. The alloy's thermal deformation behavior was studied by using Gleeble-3500 thermal simulation tester, and forging processes of the alloys were determined. The results show that the stress-plat in stress-strain curve was more stable when deformation temperature of the alloys was 850℃ and strain rate was 10 s^-1, and the flow stress was under 400 MPa. It was suitable for the forging process. Based on that, the better forging temperature of the alloys was (850±20)℃. Shearing band did not find in the as-forged alloys, and the alloy's tensile strength was over 1 200 MPa.