Influence of the Texture on Mechanical Properties of the Al-Li Alloy 1441

Results of texture investigations in sheet and plate of the Al–Li alloy 1441 are presented. The peculiarities of fracture surface morphology formation during fatigue crack propagation tests in dependence on texture inhomogeneity are considered. The deviation of the fatigue crack from the principal direction in center-notched specimens could be related to occurrence of a {110} 〈112〉 texture. The formation of crystallographic faceted fracture surfaces results from cracks extending by slip along equally shear stressed {111} 〈110〉 slip systems ahead of the crack tip.