Deformation Texture Modelling by Mean-Field and Full-Field Approaches

Abstract

An analysis on modeling the rolling textures in Al alloy by means of mean-field and full-field approaches is presented in the current contribution. The mean-field simulations were performed by the Taylor-type homogenization approach, called Alamel model, which takes into account a short-range interaction between the grains in a polycrystalline system. In order to account for the intra-grain deformation phenomena, the crystal elasto-visco-plastic finite-element model was employed. The method of strain path approximation on the quality of texture prediction was likewise discussed. The deformation history was calculated with different analytical approaches and a finite element model with isotropic mechanical properties, which accounted for various degree of accuracy. It was shown that the analytical approximations accoupled with the crystal plasticity model employed are capable of carrying out texture simulations close to the one performed with the crystal plasticity model with the deformation history obtained by means of the finite element model. Comparison of modelled and experimental textures as well as analysis of qualitative texture indicators suggest that an improvement in texture simulation can be achieved by considering heterogeneities of deformation flow across the thickness and taking into account the inhomogeneous nature of deformation inside each grain. Copyright © VBRI Press.