Effect of Cr and Mn on the microstructure of spray-formed Al-25Si-5Fe-3Cu alloy

► Cr is more effective than Mn in changing rod-like β phase to particulate α-phase ► The modification effect of Mn plus Cr on β phase is superior to that of Mn or Cr. ► Mn or Cr can greatly change the onset temperatures of Si, δ/β phase and α phase.