Effect of Crystallographic Texture on Formability of BBC Sheet Metals

Abstract

The effects of typical orientations observed in cold-rolled BCC sheets (i.e. {001}<110>; {112}<110}; {111}<110>; {111}<112> and {554}<225> texture components) on forming properties are numerically studied. It is shown that not all texture components yield forming limits in the same way: {111}<110> and {111}<112> exhibit higher limit strains than {001}<110> and {112}<110} for non balanced biaxial stretching paths. Higher formability is found for {554}<225> texture component. In addition to anisotropy induced by initial texture and its evolution, it is found that when the
orthotropic axes of the texture components are inclined 45° relative to the major stretch direction, the effects on the formability play a non-negligible role. The analyses were performed using the Markciniak-Kuczynski-type approach in conjunction with a self-consistent type polycrystal model (MK-VPSC). Finally, this analysis suggested that texture control may be effective in improving material formability.