纵向静磁场下单晶高温合金定向凝固籽晶回熔界面杂晶的形成与演化

苏震奇, 张丛江, 袁笑坦, 胡兴金, 芦可可, 任维丽, 丁彪, 郑天祥, 沈喆, 钟云波, 王晖, 王秋良

Formation and Evolution of Stray Grains on Remelted Interface in the Seed Crystal During the Directional Solidification of Single-Crystal Superalloys Assisted by Vertical Static Magnetic Field

SU Zhenqi, ZHANG Congjiang, YUAN Xiaotan, HU Xingjin, LU Keke, REN Weili, DING Biao, ZHENG Tianxiang, SHEN Zhe, ZHONG Yunbo, WANG Hui, WANG Qiuliang

图7 0.5 T磁场强度下不同抽拉速率时合金经定向凝固后在不同凝固长度处横截面EBSD反极图

Fig.7 EBSD IPFs of cross sections at the directional-solidification lengths of 0 mm (a1-c1), 15 mm (a2-c2), and 35 mm (a3-c3) under 0.5 T magnetic field (The red, green, and blue curves in the figures represent the grain boundaries of 2°-5°, 5°-15°, and 15°-65°, respectively) (a1-a3) 20 μm/s (b1-b3) 50 μm/s (c1-c3) 100 μm/s