关键词: 晶体塑性, 双晶, 晶界, 晶体取向

Abstract: Grain boundaries and initial {100} columnar grains play a key role in the inheritance and evolution of texture in the production of electrical steels. In this paper, the crystal plasticity finite element method was used to simulate the grain orientation evolution of cube and rotatedcube oriented bicrystals when grain boundary was set to different orientations. It was shown that the grain boundary in three grain boundary orientations demonstrated the characteristics of inducing Sshape deformation inhomogeneous region and alleviating the orientation rotation of local deformation inhomogeneous region. Three kinds of cube and rotated cube oriented bicrystals separated by different located grain boundaries showed obvious orientation stability under rolling conditions with surface shearing effect. In the condition of GB⊥RD boundary position, the rotatedcube oriented grain preferentially rotated at the center of the grain boundary, while the cube oriented grain rotated strongly at its end away from the grain boundary. In the case of GB⊥TD boundary position, the grain boundary obstruction to orientation rotation was the smallest, the orientation scattering was the largest and the texture intensity was most reduced. In addition to the rotation around TD, cube and rotated cube oriented bicrystals also rotated around RD and ND complexly. At GB⊥ND boundary position, orientation rotation was similar to that at GB⊥RD, but a small part of bicrystal rotated around ND.

Key words: crystal plasticity, bicrystal, grain boundary, grain orientation