Research Status of Numerical Simulation of Electron Beam Selective Melting Thermal Behavior

Electron beam selective melting parts experienced complex thermal history, resulting in multi-scale microstructures. Thermal history data play an important role in microstructure formation analysis. The complex metallurgical behavior of micro-melting pool makes it difficult to obtain the temperature-time-spatial data by experimental means. As a new technical method, numerical simulation technology provides a new idea to solve this problem. In this paper, the research status of numerical simulation of electron beam selective melting thermal behavior was reviewed from the aspects of mathematical theory of temperature field, simulation process, thermal-mechanical coupling simulation, thermodynamic simulation of molten pool and thermal defect mechanism. The challenges and future prospects of numerical simulation of electron beam selective melting thermal behavior were discussed.