Modelling of the microscopic strain heterogeneity during cold rolling of steel sheets. Prediction of the deformation texture

Two drawing steels were cold rolled to 70% reduction. Their hot rolling and cold rolling textures were measured by X-ray diffraction and converted int o ODFs. The cold rolling ODFs are qualitatively and quantitatively compared to the predictions of four polycrystal deformation models. It turns out th at the Lamel model, which has recently been developed, provides predictions that are much closer to reality, than the other models (i.e. the classical Taylor "full constraints" and "pancake" models and the more complex genera lised relaxed constraints model with a self-consistent scheme). Looking mor e deeply into the results of the simulations, systematic correlations can b e observed between the grins' crystal orientations and their relaxations. T hese observations are common to all four models. It is finally discussed ho w the Lamel model can be extended for the prediction of grain subdivisions in fee metals. The latter developments of the model are part of ongoing res earch.