EXPERIMENTAL OBSERVATION AND MODELLING OF THE ORIENTATION EVOLUTION OF INDIVIDUAL GRAINS IN COLUMNAR GRAIN Ni DURING COLD ROLLING
柱状晶Ni在冷轧过程中晶粒取向的演变及模拟

Columnar grain Ni samples with initial {001} rientations were cold rolled to reductions of 0%, 10%, 30% and 50%, respectively. By using EBSP (electron back scattering pattern) technique, the orientation evolution of individual grains during rolling was followed, and the statistic results of grain rotation were obtained. A Taylor model was used to simulate the orientation evolution of each grain, and the modelled results were compared with observed results. It is found that the orientation evolution of individual grains during rolling is mainly effected by its initial orientation, and only a part of grains follow the evolution rule described by the Taylor model.