先进材料疑固实验室 Laboratory of Advanced Materials Solidification 5 =0.5 =0.5 ◆◆k=0.1 ◆◆k点=0.1 -而=0.01 ■点=0.01 △4=0.001 △4k=0.001 3 2 -△△△△ 44 0 200 400 600 800 1000 0.2 0.4 0.6 0.8 Vp/De 1+vp(E -L)/2De (a)Initial transients (b)Final transients Fig.5.6 The computed initial and final solid composition profiles for binary alloys with different values of ko,solidified at constant velocity.The data in this figure correspond to De/vp=1 mm. 上浒充通大 SHANGHAI JIAO TONG UNIVERSITY