Microstructure evolution of a modified AA5083 aluminum alloy during a multistage homogenization treatment

► Effect of thermal treatment on the microstructure of the cast AA5083 alloy. ► As-cast state: dendrite cores contain ν-Al11(Mn,Cr)4 (LT) dispersoids. ► 555 °C anneal: dissolution of eutectic metastable Al6(Fe,Mn) particles. ► 555 °C anneal: precipitation of rod-shaped stable Al6(Mn,Fe) dispersoids. ► 460 °C anneal: precipitation of Al18Mg3(Mn,Cr)2 dispersoids in the dendrite cores.