Experimental and Finite Element Studies of Stretch Forming Process for Ti-6Al-4V Alloy at Elevated Temperature

Abstract

In this study, experimental and Finite Element (FE) analysis has been studied of stretch forming process for Ti-6Al-4V alloy at 400°C. Initially, uniaxial tensile tests experiments have been conducted to study the material properties at 400°C. Furthermore, stretch forming experiments have been performed using Nakazima test. The various quantitative parameters such as Forming Limit Diagram (FLD), Limiting Dome height (LDH) and thickness distribution are evaluated at 400°C. Additionally, Finite Element (FE) analysis of stretch forming process has been done using commercial available DYNAFORM software with LSDYNA server. Two different anisotropic yield criteria namely; Hill 1948 and Barlat 1989 with Hollomon Power Law (HPL) are consider for FE simulations. The results of FE simulations are compared with the experimental results. It has been observed that Barlat 1989 yield criterion prediction is more accurate than Hill 1948.