定向凝固糊状区枝晶粗化和二次臂迁移的实验和模拟
方辉1,薛桦1,汤倩玉1,张庆宇1,潘诗琰2,朱鸣芳1(
)
)
Dendrite Coarsening and Secondary Arm Migration in the Mushy Zone During Directional Solidification:
Hui FANG1,Hua XUE1,Qianyu TANG1,Qingyu ZHANG1,Shiyan PAN2,Mingfang ZHU1()
)
图7. 利用包含熔化和凝固效应的CA模型模拟的SCN-2.0%ACE合金在G=9 ℃/mm条件下保温不同时间后的枝晶臂迁移、粗化及合并的形貌
Fig.7. Simulated dendrite arm migration, coarsening and coalescence using CA model involving both melting and solidification mechanisms for a SCN-2.0%ACE alloy at G=9 ℃/mm for the holding time of 0 s (a), 20 s (b) and 40 s (c) (Box 1: melting of small dendrite arms, box 2: advancement of interdendritic grooves, box 3: joining of dendrite arm tips, CA—cellular automaton)
