The urgent requirement for a reduction in greenhouse gas emissions strongly forces lightweight design and the not less important reduction of metallic raw materials follows in an increased recycling of scrap material. In the case of aluminium alloys this leads to a compositional change of both, hardenable and non hardenable alloys. An increased amount of iron for example directly increases the volume fraction of primary phases present. Thus far, these were seen as microstructural constituents that have to be tolerated but, together with a high amount of dispersoids, the primary phases can be used proactively to adjust microstructure and texture.

The primary phases´ efficiency in boundary pinning or acting as nucleation sites was studied on 5xxx and 6xxx alloys with varying contents of Fe and Mn, respectively. Standard thermomechanical processes already lead to a homogeneous distribution of partially fragmented primary phases, which would suggest a randomization of the texture due to particle stimulated nucleation in the final annealing step. Electron backscatter diffraction analyses showed, that depending on the contents of dispersoids, the nucleation is retarded, which partially explains the absence of PSN texture components and the generally weak texture in both, the 5xxx and 6xxx alloys. Moreover, microstructure, texture and recrystallization behaviour were compared for areas in the vicinity of primary phases and in zones less influenced by large particles.