首页|Physically based microstructure modelling of AA6082 during hot extrusion
Physically based microstructure modelling of AA6082 during hot extrusion
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Process parameters in aluminium extrusion technology are key points that influence product properties. The precipitation hardening aluminium alloy 6082 is investigated according to different process conditions and the influence onto the final microstructure is simulated as well as experimentally verified. A physical microstructure model based on three dislocation types and three nucleation sites for recrystallization is implemented into the commercial Finite Element package FORGE 2008 to calculate both the microstructure evolution during the extrusion process as well as the recrystallized fraction after the process. The precipitation kinetics during homogenization was investigated using the thermodynamic calculation software MatCalc since the main nucleation mechanism for recrystallization is particle stimulated. The experimental validation was done by miniature extrusion tests and the microstructure was investigated metallographically and by EBSD measurements.
AA6082hot extrusionFEMmicrostructure modellingdislocation density evolutionnucleation
F. Krumphals、P. Sherstnev、S. Mitsche、S. Randjelovic、C. Sommitsch
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Christian Doppler Laboratory for Materials Modelling and Simulation, Institute for Materials Science and Welding, Graz University of Technology, Kopernikusgasse 24, 8010 Graz, Austria
Research Institute for Electron Microscopy, Graz University of Technology, Steyrergasse 17, 8010 Graz, Austria
Faculty of Mechanical Engineering, University of Nis, Aleksandra Medvedeva 14, 18000 Nis, Serbia
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