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Finite element method (FEM)  modelling can be used to predict residual stresses and distortion during quenching. One part of the necessary constitutive equations covers the strain hardening model (isotropic, kinematic or mixed) for the material in an undercooled state. Therefore, tension and tension / compression tests of undercooled aluminium alloys like EN AW-6082 were performed in a quenching and deformation dilatometer. Samples have been solution annealed and quenched in the dilatometer at a supercritical cooling rate. Immediately after quenching, uniaxial tension or tension / compression tests at varying temperatures have been performed. These experiments allow a study on the influence of the temperature on the Bauschinger effect. The magnitude of the Bauschinger effect was found to decrease with increasing temperature. Finally, the results have been implemented in the material model of the FEM-Software SYSWELD®.

Bauschinger effect in undercooled 6082 aluminium wrought alloy