Planar anisotropy evaluation of new CaO-added Al5052 alloy sheet with plane stress yield functions

An obstacle to broader implementation of aluminum alloys in transportation industries is the superior formability of less costly steel alloys. Enormous potential benefits in mass reduction for fuel economy improvements with light weight, nonferrous alloys have stimulated novel approaches to forming complex aluminum components. In this paper, planar anisotropy of the new Al50552 alloy containing a calcium(Ca)-based compound, which is so-called Eco Al5052, was evaluated experimentally. The planar anisotropy was then modeled with three plane stress yield criteria of different complexity and theory bases, i.e., Hill’48, Yld89 and Yld2000. The results indicate that different yield models distinctly affect the interpolation accuracy of the planar anisotropic behaviors. Yld2000 criterion exhibit better agreement with experimental data than those from Hill’48 and Yld89 criteria since it has great extensibility due to the larger number of the mechanical parameters incorporated.