Numerical simulation and its application of rheological forming of titanium alloy vane disk
(1.Institute of Rheological Mechanics and Material Engineering,Central South University of Forestry and Technology, Changsha 410004, China2.Institute of Rheological Mechanics & Material Engineering, Central South University of Forestry & Technology, hangsha 410004, China3.Swan College of Central South University of Forestry and Technology, Changsha 410004, China4.College of Civil Engineering, Architecture and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China)
Abstract: The hot rheological forming method was proposed to form the second titanium alloy vane disk. The hot rheological forming process of the TC11 titanium vane disk under a certain temperature and different strain rates was investigated by using the bulk forming software of DEFORM 3D. A series of results including temperature field, equivalent strain distribution, load-stroke curve and rheology procedure were obtained by this finite element method. The rheological forming characteristics were well realized and the forming parameters were determined. The results and analysis show that with decreasing strain rate, the metal flow more equably and the filling of the vane shape is also better. Moreover, the mechanical properties and microstructures of the products produced by this new technique are improved evidently compared with that produced by traditional method.
Key words: TC11 titanium alloy; vane disk; hot rheological forming; numerical simulation; stain rate