Abstract
Despite the attractive strength-to-weight ratio of magnesium alloys, the application of magnesium sheet structures is restricted. Its anisotropy, the tension–compression asymmetry (the so-called strength differential effect, SD effect) and its poor formability at room temperature challenge engineers. In the current contribution, the deformation and failure behaviour of the innovative magnesium alloy “E-form” AZ31 at room temperature is investigated by means of mechanical tests and respective numerical simulations. Tensile and modified Arcan tests are analysed by digital image correlation (DIC) techniques. Arcan tests impose shear stresses while bending tests are conducted to force simultaneously tensile and compressive stresses in a sample. Irreversible deformation is described by a two-yield surface model, which couples the micromechanical mechanisms of dislocation glide and deformation twinning. Anisotropic failure is modeled using a linear transformation of the strain rate, which allows for a fast and efficient assessment of forming operation.
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