Influence of Texture on Fatigue Crack Propagation of Er-containing Aluminum Alloy

Through different processes of rolling and heating treatment, the Er-containing Al alloy plates contained different types of textures were obtained. The effects of textures on the fatigue crack growth of the Al alloy plates were investigated through the high cycle fatigue test for center crack plate. The results show that the contents of textures were related to rolling deformation and annealing temperature. The fatigue crack tended to propagate along the path with large Schmid factor. The more textures the plate had, the smaller the misorientation angles between grains and the deflection of cracks became, the shorter the fatigue crack propagation path was, and the faster the fatigue crack propagation rate was. The less textures the plate had, the larger the misorientation angles between grains and the deflection of cracks became, the longer the fatigue crack propagation path was, and the lower the fatigue crack propagation rate was.