Research Progress on Microstructures and Defects in Directionally Solidified Superalloys under Static Magnetic Field

Author of the article:ZHAO Yong, SU Haijun, YANG Peixin, GUO Yinuo, XIA Le

Author's Workplace：State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi' an 710072, China

Key Words：static magnetic field; superalloy; directional solidification; thermoelectromagnetic effect

Abstract：Directional solidification under magnetic field provides a new method for tailoring microstructures and controlling defects in superalloys. The research progress on directional solidification of superalloys under static magnetic field is reviewed in this paper. The thermoelectromagnetic effect in superalloys under the magnetic field and the corresponding simulation results are primarily introduced. The effects of transverse static magnetic field and longitudinal static magnetic field on dendrites, γ/γ′ eutectics, and γ′ phases of directionally solidified superalloys are systematically summarized. The influences of static magnetic field on the defects such as dendritic segregation and stray grains of superalloys are also overviewed. Finally, the problems that need to be further solved are pointed out, and the future development trend of superalloys solidified under magnetic field is also prospected.