先进材料疑固实验室 Constitutional undercooling Laboratory of Advanced Materials Solidification Melting temperature of the liquid in front of the interface (b)SOLUTE ENRICHED LAYER IN FRONT OF LIQUID-SOLID INTERFACE LIQUID SOLID C aIno DISTANCE x' (a) (b) TLIQUIDUS TACTUAL TACTUAL TLIQUIDUS CONSTITUTIONALLY SUPERCOOLED REGION DISTANCE,X-→ DISTANCE,x' (c) (d) 上游文通大学 SHANGHAI JIAO TONG UNIVERSITYConstitutional undercooling Melting temperature of the liquid in front of the interface