先进材料疑固实验室 Cast microstructure Laboratory of Advanced Materials Solidification Inner equiaxed grains Equiaxed dendrites 102 dendritic grain growth equiaxed 103 Single phase alloys Inner col Columnar growth lumnar casting grains Cellar growth (s/ww)A oriented dendritic G/V-(Tj-T2)DL 10 D.S Pure Planar growth metal 102 10 GL/V K/s Negative 0 Positive temperature gradient temperature gradient coarse oriented cellular Ve:G D/ATo 10~5 The effect ofandnh D feature of crystal growth 10 101 10 103 G(K/mm) 之原人边人学 SHANGHAI JIAO TONG UNIVERSITYCast microstructure Planar growth