Deformation Behavior of Mg from Micromechanics to Engineering Applications

We have investigated the influence of the underlying microstucture of Mg on its macroscopic deformation behavior. Using microcompression experiments on Mg single crystals, we have identified the orientation dependent deformation slip and twinning systems. These experiments have aided the development of an energy based crystal plasticity model for the twinning in polycrystals. This model has been applied to representative volume elements to identify the flow surface for a macroscopic model, which is used to predict the forming limit diagram. Validation of the results has been realized through Nakazima tests. Additionally an outlook is given on the prediction of the forming behavior of laser beam welded Mg sheets and its dependence on welding direction.