Comparison of experimental AA6063 extrusion trials to 3D numerical simulations, using a general solute-dependent constitutive model

Modification of a Thermomechanical Model to Predict Constitutive Behavior of Al-Mg-Si Alloys

“…This assumption is justified for the PSC measurements due to the short duration (∼0.012 s) of the deformation, which does not permit significant Mg 2 Si dissolution. This assumption was also justified for the extrusion pressure in isothermal laboratory-scale experiments (Ref 11,12), because thermal equilibrium was maintained during extrusion. However, in other work (Ref 15), the thermomechanical model was applied to non-isothermal industrial extrusion.…”

“…In previous work (Ref 11,12), the effect of the condition of Mg and Si in an AA6063 alloy was investigated for isothermal laboratory-scale extrusion and with plane strain compression (PSC) tests. It was shown that differences in solute content resulted in differences in the extrusion pressure and in the flow stress, measured by PSC tests just before extrusion.…”

Improvement of mechanical properties of AA6063 aluminum alloy after equal channel angular pressing by applying a two-stage solution treatment

“…In this industrial practice, it is of critical importance to control the extrusion process in order to ensure the dissolution of maximum amounts of Mg and Si into the aluminum solid solution, when the hot-deformed product leaves the extrusion die and enters the online quench channel. The resultant mechanical properties after artificial ageing are affected by extrusion process parameters, such as billet temperature, extrusion speed, reduction ratio and extrusion die design [4][5][6][7][8][9][10][11]. Due to practical constrains, it is impossible to apply quench as soon as the extruded product leaves the die orifice and there is always a time interval between the moment that the extruded product leaves the die orifice and the start of an intensive cooling process.…”

A numerical sensitivity study to determine the main influence parameters on the back-end defect

“…The Eulerian approach is well capable of handling complex geometry and large deformations, but it does not permit the generation of a free surface, which actually occurs during the whole extrusion process. The recently developed arbitrary Lagrangian Eulerian (ALE) approach uses a free surface correction scheme to update the geometry so that bending, warping or twisting of the extruded profile can be predicted [7][8][9][10][11][12][13][14]. However, it still has inherent limitations of the Eulerian approach.…”