Inhomogenity of Microstructure and Tensile Properties of 7475-T761 Al Alloy Sheet

The microstructure and mechanical property of 7475-T761 Al alloy sheet in diffrent positions along the width direction were studied by universal material testing machine and electron back-scattering diffraction（EBSD）. The results show that the tensile properties, microstructure and texture are slightly different at different positions along the width direction.The tensile strength and yield strength are highest at the edge, followed by 1/4 and the lowest at the center. The structures at different positions are deformed structures with elongated grains. The grain density at the edge is largest, followed by 1/4, and the smallest at the center. The texture of different width position is 110＜001＞ and 112＜110＞, 110＜001＞ is strong texture. The texture strength is strongest at the edge, followed by 1/4, and the weakest at the center.The grain with small Schmid factor is most at the edge, followed by 1/4, and the least at the center.