Extrusion of silicon-rich AlMgSi alloys

► AlMgSi1 alloy with high silicon content. ► Silicon additions reduced extrudability of the AlMgSi1 alloy. ► Extrusion pressure does not depend on silicon content. ► Particle stimulated nucleation of recrystallization. ► Mechanical properties of the silicon rich alloys are below those of the standard AlMgSi1 alloy.