Abstract
Controlled twin-roll casting experiments were carried out with Al-Mg, Al-Fe, and other commercial aluminum alloys in order to investigate the effect of casting speed and alloy composition on the centerline segregation and cast structure. It is concluded that the centerline segregation increases as casting speed increases and alloy composition increases. The observations are discussed in terms of the interdendritic fluid motion through the partly solid regions, which arises because of the pressure gradient in the roll gap.
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