Image-based crystal plasticity analysis on activities of slip systems in alpha-Ti

Abstract

Using a crystal plasticity finite element (CPFE) method, uniaxial tensile analysis of a polycrystalline α-Ti was numerically simulated with the several sets of critical resolved shear stress (CRSS), and the changes in the activity of slip systems were investigated. The geometrical model for the analysis was built from crystal orientation maps of a pure titanium with RD-split texture, which were obtained with electron back-scatter diffraction patterns (EBSD). The results showed that the activity of a slip system and strain decrease with increase of CRSS for the slip system in certain regions, and it results in increasing the activity of other slip systems and strain in the other regions; that is, the activity of slip systems and strains have the relationship of a trade-off among the regions depending on CRSS.