Abstract

The quality of weld seams produced during extrusion of hollow profiles is a big issue in the extrusion industry. The presented investigations deal with the characterization of extruded weld seams for the alloys AlMgSi0.5 (EN AW-6060), AlMgSi1 (EN AW-6082) and AlZn4.5Mg1 (EN AW-7020). Mictrostructural analysis and material properties have been analyzed with respect to variations in billet temperature, extrusion speed, subsequent cooling and heat treatment. The alloys show distinct differences in recrystallization behavior and microstructure of the weld seams and the surrounding base material.

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