Robust Design on Equal Channel Angle Extrusion of Ti - 6Al - 4V Using Taguchi Method

Abstract

This paper employs the rigid-plastic finite element (FE) DEFORMTM 3D software to investigate the plastic deformation behavior of Ti-6Al-4V titanium alloy during ECAE extrusion forming processing. Under various ECAE extrusion forming conditions, the FE analysis investigates punch load distribution and the effective strain distribution. A series of simulation analyses, in which the variables relied on different of the internal angle between the two die channels, the friction factors, the titanium alloy temperature and the strain rate of billet, were run to examine die radial load distribution when equal channel angle extrusion. Finally, we used the Taguchi method to determine the best design parameters. In the design process, our results confirmed the suitability of the FE method and the manufacturing process for titanium alloy forming.