Characterization of misorientation gradient of an aluminum bicrystal in simple shear

The misorientation gradient was investigated in the region of a symmetrical tilt 〈1 1 2〉 boundary with a misorientation of 8.7°. The strain and orientation distributions were obtained by photogrammetry and EBSD to characterize the kinematical behavior of the grain boundary. In order to obtain a misorientation gradient, the misorientation was used in representation of the axis-angle description. This formation of the orientation gradient is found to have a common rotation axis in the [1 −2 −1] direction.