Monotectic Solidification Structure of Al-In Alloys

Abstract

The monotectic solidification mechanism is considered for the non-directionally solidified Al-In alloys. For the monotectic and hypermonotectic alloys, the Al solid of a monotectic product spherically grows in volume. The L₂ phase which separates simultaneously with formation of the Al solid from the melt arrays radiately from a center of the spherical Al solid. On the other hand, the monotectic solidification morphology depends on the primary Al dendrite for the hypomonotectic composition. That is, the deposition of Al solid of a monotectic product onto the primary Al dendrite results in a nearly random L₂ phase distribution.