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The aim of this paper was to investigate the influence of thermomechanical treatment (TMT) on different properties of two commercial aluminum alloys from the 6000 series, EN AW-6060 and EN AW-6082. The investigation included changes in the mechanical and electrical properties as well as microstructural changes during TMT. Hardness, microhardness and electrical conductivity were studied as a function of the deformation applied after the aging treatment. The deformed samples were compared with the quenched and aged samples. The applied deformation caused an increase in the mechanical properties and a decrease in the electrical properties (electrical conductivity). The highest values for the mechanical properties were achieved after a 50-% deformation. SEM/EDS microstructural investigations showed the number of precipitated phases. The ratio of silicon and magnesium atoms in the main hardening metastable " phase in the deformed samples was closer to the ideal compared with the aged ones.

Influence of thermomechanical treatment on the properties of commercial aluminium alloys from the 6000 series