The Shape Distortions Formed in Flat Bottom Punch Raising Process with TC2Mδ1.53 Titanium Alloy Sheet
Raising processes of titanium alloy sheets TC2M were simulated by using ADINA FEM software. The shape distortions induced by plastic anisotropy during forming and springback processes were described. A series of forming tests were conducted for the comparison of simulation predictions and test measurements. Reasonable agreement was obtained between the predicted and measured profiles of formed parts. Two sorts of shape distortion phenomena exhibited in the raised workpieces fabricated in room temperature after springback or elastic recovery process: Firstly, the bottom of the flange in the specimen was distorted to be a wavy surface and not a plane. There are two highest points and two lowest points, and the highest points located in the flange periphery along the transverse direction (TD), and the lowest points located in the periphery along the rolling direction (RD); Secondly, the top surface of the raising specimen was distorted to be a wavy surface too, and the distortion shape is similar to that in the flange.
Liangchi Zhang, Chunliang Zhang and Tielin Shi
L. Y. Zhang et al., "The Shape Distortions Formed in Flat Bottom Punch Raising Process with TC2Mδ1.53 Titanium Alloy Sheet", Advanced Materials Research, Vols. 139-141, pp. 553-556, 2010