1. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110167, China
2. Shi-changxu Innovation Center for Advanced Materials, Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Compared with the traditional processing of superalloys, additive manufacturing of superalloys has the advantages of short production cycle and high material utilization. However, there are still some problems and bottlenecks that hinder the development of additive manufacturing of superalloys. For example, it is difficult to avoid porosity and crack defects in the forming process, and the anisotropy of material properties is obvious. The emerging magnetic field-assisted additive manufacturing technology can affect the convection and solidification kinetics of the molten pool, change the solidification structure of the material, and optimize the mechanical properties of the material by virtue of the non-contact control characteristics of the magnetic field. Therefore, this paper introduces the influence mechanism of magnetic field on melt flow and microstructure solidification during metal solidification. The research progress of magnetic field on additive manufacturing of superalloys is reviewed in detail. The effects of magnetic field on defects, microstructure and mechanical properties are analyzed.