Simulation Study on Temperature Field of Laser Powder Bed Fusion
Laser powder bed fusion is widely used in aerospace,medical and nuclear power fields.The forming process in-volves a variety of complex physical phenomena that have a great impact on the quality of components,also the exploration of material processing parameters is based on a large number of trial experiments with high cost and low efficiency.In order to solve the above problems,this paper proposes a mesoscopic physical model,the use of EDEM,Gambit and FLOW-3D soft-ware for discrete powder bed and powder melting during the laser powder bed fusion forming process for mesoscopic tempera-ture field simulation,explore the influence of scanning speed on the temperature field.The influence of the morphology and size of the molten pool clarifies the evolution of the temperature field.The results show that under the laser power P=215 W,the scanning speed V=900 mm s-1is the optimal process parameter,the melting channel is relatively straight and uniform,the necking and spheroidization defects are the least obvious,and there is no phenomenon that adverse-ly affects the quality of components such as splashing and overmelting during the forming process.The model was ver-ified by experiments,and good consistency was obtained.The simulation results can provide some theoretical support for the exploration of process parameters in the process of laser powder bed fusion.
laser powder bed fusionmesoscopic scalenumerical simulationtemperature fieldmolten pool size
万方数据
维普
