Crystallographic Texture and Structure of Rolled Al-Cu-Li Alloy Sheets

The crystallographic texture of billets-namely, forgings and a pressed strip made of an Al-Cu-Li alloy-and sheets rolled from them has been studied by X-ray diffraction. The results obtained are used to estimate the structural state of the rolled metal of the sheets fabricated according to various schemes. Pronounced crystallographic orientations {110}< 112 > and {113}< 332 > in the sheets rolled from the pressed strip correspond to a homogeneous fine-grained grain structure of the aluminum matrix. This structure provides good ductility (delta = 10%) and small d anisotropy in the rolled metal. The absence of a symmetrical texture "motif" in the pole figures recorded from the sheets rolled from the forged billets is related to the inhomogeneity of their recrystallized structure. This structure decreases the ductility characteristics of the sheets rolled from the forged billets.