Through-thickness texture variation in cold-rolled AA 5182 aluminum alloy with an initial {001}〈110〉 texture

Abstract

Through-thickness texture variation in cold-rolled AA 5182 aluminum alloy with an initial {001}〈110〉 texture was investigated by X-ray diffraction. A detailed quantitative analysis of texture volume fractions in several layers was performed. The effect of initial through-thickness texture gradient and roll-gap geometry on the texture evolution during multipass rolling was determined. A pronounced texture variation through the thickness was found in the initial material. The shear deformation produced by the friction between the roll and the sheet contact surface may be neglected in the present experiment with oil as a lubricant. At low strains with the l/h ratio from 0.9 to 2.0, the shear deformation caused by the roll-gap geometry slightly decreased the lattice rotation from the {001}〈110〉 orientation to the C orientation at the intermediate layer, while the roll-gap geometry did not produce a shear strain at large strains with higher values of the l/h ratio. The strong initial r-cube texture at the center layer stimulated the transformation from the r-cube orientation to the C orientation and the formation of the β fiber during rolling.