Texture and Anisotropy of the Mechanical Properties of an Al-Mg-Li-Zn-Sc-Zr Alloy

The formation of rolling texture in the a solid solution and the delta' phase in various sections of 1424 (Al-Mg-Li-Zn-Sc-Zr) alloy sheets 1.6-8 mm thick is studied using pole and inverse pole figures. The textures of the a solid solution and delta' phase are shown to be characterized by similar changes in the orientations across the sheets. The medium layer in the sheets has a two-component {011} < 211 > + {135} < 211 > texture with the predominant first component. The anisotropy in the mechanical properties of the alloy sheets is characterized by a high yield strength and a low plasticity in the longitudinal and transverse directions as compared to direction at an angle of 45 degrees to the rolling direction. A model for the calculation of the anisotropy in the yield strength of the alloy is proposed; it takes into account the texture in the alloy, the ratio of the volumes of the alpha solid solution and delta' phase, and their relative strength.