EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

The mechanical properties of commercial Al-Fe-Si alloys are influenced by the materials microstructure and microchemistry. In this work, the variation of alloying elements distribution, microstructure (e.g. grain size; dendritic arm spacing) and electrical conductivity across an AA 8079 DC-ingot were investigated. Furthermore, the effects of various experimental homogenization practices on the microchemistry of samples from edge and center of an ingot were analyzed. In particular, the evolution of phase volume fractions of constituents and dispersoids is discussed. This work shows, that a high-temperature, two-step homogenization practice results in larger dispersoids and decreased solute levels, which is expected to influence the materials later softening behavior.