Changes and anisotropy in tensile properties of rooled Al-Mg alloys during long term aging.

Age softening phenomena were investigated on aluminum alloys 5182 and 5052 which were heavily rolled and then aged at room temperature. Tensile strength and proof stress decrease but elongation increases with increase in the aging time. Elongation is larger in the transverse direction than in the rolling direction either after the rolling or in the aged condition. The ductility showed an anisotropy which is correlated with the tendency of serrated flow and Luders band formation.