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2 抽拉速率为20 μm/s时，不同磁场强度下合金经定向凝固后在不同凝固长度处横截面的宏观形貌

Fig.2 Macroscopic morphologies of cross sections at the positions of 0 mm (a1-c1), 15 mm (a2-c2), and 35 mm (a3-c3) prepared by directional solidification under different magnetic fields at the pulling rate of 20 μm/s (B —magnetic field) (a1-a3) 0 T (b1-b3) 0.5 T (c1-c3) 1 T