Experimental analysis and modeling of the anisotropic response of titanium alloy Ti-X for quasi-static loading at room temperature

Abstract

This paper deals with the characterization and modeling of the deformation behavior of titanium alloy Ti-X© under quasi-static conditions at room temperature. The material investigated is a 1.2 mm thick rolled sheet with a strong basal texture. Monotonic tensile, compressive and cyclic tests in various directions relative to the rolling direction were conducted in order to characterize the material behavior. Textural information was obtained from electron backscatter diffraction (EBSD) data. Strip drawing tests were also carried out. The experimental data has been extended to biaxial stress states using the visco-plastic self-consistent texture model (VPSC). The CPB06ex2 model Plunkett et al. (Int J Plast 24:847–866, 2008) was used to describe the yield surface. This model can describe the anisotropy and the tension-compression asymmetry. Distortional hardening was described taking account of the evolution of the model parameters. An extension of the model using the Armstrong and Frederick approach makes it possible to account for the Bauschinger effect during cyclic loading. There was a high level of correlation between the FE simulation and experimental data.