The Influence of Non‐Octahedral Slip on Texture Development in FCC Metals

Abstract

In order to account for the differences observed between low and high temperature deformation textures, the influence of slip or cross‐slip on planes other than the {111} is considered in FCC metals. The first set of possible new slip systems treated is the {100}〈110〉. The dual single crystal yield surface is constructed using a novel technique, and deformation textures are predicted for rolling and torsion using the FC‐RC model usually employed at room temperature. The {112} and {110}〈110〉 cross‐slip systems are also considered. The rolling textures obtained when slip and cross‐slip or only cross‐slip occur are presented. These two cases are first treated on the assumption of a constant CRSS on all systems and then with the aid of a linear latent hardening law, which only takes into account the interactions between colinear systems. It is shown that the concurrent activation of both slip and cross‐slip systems leads to the presence of three main rolling components: i.e. the Cu, S and brass orientations, in proportions that vary with the CRSS ratios of the different systems. These results are in good agreement with experimental observations for high SFE metals such as aluminum. Some torsion textures are also presented for the case when both slip and cross‐slip systems are activated. The trends observed in this case are not as clear as in the case of rolling. However, the orientation, which is the only component found at high temperatures and high strains in aluminum, is present in higher proportions than with the classical FC‐RC model, but some other texture components are also present.