Crystallographic Orientation Distribution Control by Means of Continuous Cyclic Bending in a Pure Aluminum Sheet

Continuous cyclic bending (CCB) has been proposed as a useful straining technique to produce the high strain on the surface layers and the lower strain in the central layer of the sheet. A pure aluminum sheet is worked by the CCB using the ‘‘Roll traveling device’’ and ‘‘Roll driven machine’’. It is found that a sharp Cube orientation is formed by the CCB and subsequent annealing in the pure aluminum sheet. Influences of the CCB/annealing process parameters such as partial or final annealing temperature, strain inside grains and repeating effect, on the Cube sharpening are investigated. The sharper Cube orientation is obtained for the higher temperature of the final annealing after the roll traveling device CCB. While a considerably strong Cube texture appears after one routine of the roll driven machine CCB/773K-3.6 ks, the texture is weakened after two routines repeated to change into a random texture. The 10 Pass and 20 Pass CCBs with a comparatively low degree of working before partial annealing lead to a high Cube fraction more than 60%. [doi:10.2320/matertrans.L-MRA2007870]