SEM/EBSD Analysis of Changes in Crystal Orientation of {111} <112> Cu Single Crystal Caused by The Cold-Rolling

Orientation changes of a Cu single crystal with an initial orientation of {111} < 112 > caused by cold-rolling were analyzed using electron back-scatter diffraction patterns obtained by scanning electron microscopy. The orientation changes were understood as the rotation around TD and the formation of band-like structures parallel to RD was observed after the cold-rolling. Multiple-slip systems of the {111} < 112 > single crystal operated by the cold-rolling were discussed. Orientation changes after the cold-rolling were explained reasonably by the operations of two different multiple-slip systems. High-angle grain boundaries were formed between the band-like structures in the single crystals rolled to 30% and 50% reduction. Striped patterns observed on the TD plane in the region where one of the multiple slip systems operated were also discussed. The striped patterns were explained by small. angle tilt boundaries consisting of arrays of edge dislocations on the slip planes.