A ductile damage progress of an aluminum single crystal under tensile loading was verified by a profile analysis using white X-ray obtained in BL28B2 beam line of SPring-8. In this study, the aluminum single crystal of the purity 6N was used as a specimen prepared in I-type geometry for tensile test. Notches were introduced into both sides of the center of a parallel part of the specimen by the wire electric discharge machining. White X-ray beam, which has 0.05 mm in both height and width, was incident into the specimen on the Bragg angle θ of 3 degrees using energy dispersive X-ray diffraction technique. The specimen was deformed by elongation in the direction of 45° to [111] and [1-10] crystal orientations, respectively, and a diffraction profile of the white X-ray from A1220 and A1222 planes were analyzed. The Gauss component of integral breadth related to non-uniform strain was deter-mined by eliminating the broadening by the instrumental function from the diffraction profile of white X-ray. As a result, the characteristics of ductile damage progress near the notch of the aluminum single crystal were inspected from the distribution of both dislocation density and rotation of dislocation cell.
