A new approach to control centerline macrosegregation in Al-Mg-Si alloys during twin roll continuous casting

Al-1.0%Mg-1.2%Si sheets were processed by twin-roll casting process under static magnetic field, pulse electric current field and combined fields. The evolution of centerline macro-segregation in each processing condition was studied. The study suggests that the application of combined static magnetic field and pulse electric current field are more effective in controlling the macrosegregation during twin-roll casting process as compared to in the presence of a single physical field is used. Additionally, the effect of single pulse electric current field was greater than the single static magnetic field with regard to macrosegregation