Grain Rotation and Texture Evolution in Cubic Polycrystals Determined by Synchrotron X-ray Diffraction

By high energy synchrotron X ray diffraction, the evolution of microstructures during the compression of copper with different grain sizes were traced respectively. The grain refinement and mosaic spread of sub-grain were observed dynamically from the movie of 2 D diffraction patterns as well as the diffraction profile broadening, the anisotropic grain orientations were obtained with numerical analysis. Complementary neutron diffraction was employed for the ex-situ texture measurement, which approve the effects of grain rotation on the formation of texture. Relation between lattice strain and grain refinement rate was analyzed with various loading condition. The results fulfill the understanding of the evolution of grain orientation and slip mechanism during compressive deformation.