Effects of processing conditions on the sintering response of hypereutectic Al-Si-Cu-Mg P/M alloys

► The optimal processing conditions for Al-15Si-2.5Cu-0.5 Mg(wt%) has been determined. ► Nitrogen atmosphere was the most efficacious sintering atmosphere. ► Pore swelling effect occurred due to the decomposition of MgH2.. ► Microstructural evolutions at different sintering temperatures were investigated.