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In this work, forming and fracture limit diagrams have been experimentally evaluated for aluminium 5052 alloy sheet annealed at four different temperatures namely 200°C, 250°C, 300°C and 350°C. With the help of these diagrams, the safe range which avoids necking and fracture during forming of aluminium 5052 alloy sheets was examined and the effect of annealing temperature on this range and other parameters namely microstructure, tensile properties and formability parameters were studied. The forming limit diagrams of aluminium 5052 alloy sheets annealed under different temperatures were also examined with respect to the crystallographic texture point of view. The crystallographic textures were then correlated with normal anisotropy of the sheet metal. It was found that the formability of aluminium 5052 alloy annealed at 350°C possessed good formability, optimal texture and high normal anisotropy value.

Effect of annealing on formability and crystallographic textures of aluminium 5052 alloy sheets