Modeling Deformation Texture and Anisotropy during the Tensile Test of an Interstitial-Free Steel Sheet by Means of a Self-Consistent Viscoplastic Model

摘要

A self-consistent viscoplastic (VPSC) model was employed to simulate the evolution of the r value and stress during a tensile test. To perform the calculation, the one-site approximation (a grain embedded in an infinite medium) was used. The anisotropic responses of both the grain and the medium were considered. The model calculations were compared with experimental results measured on an interstitial-free (IF) steel, including evolution of texture, stress, and r during deformation. The model shows qualitatively good agreement with the experimental results; however, an overestimation of the r value when the tensile test is performed in the diagonal direction was observed. The origin of this discrepancy needs further investigation. The role of work hardening (latent hardening) and grain rotation on the evolution of r is described. Finally, the VPSC results were compared to the Taylor-based model results.