选区激光熔化镍基合金IN625数值仿真热源模型比较研究OACSTPCD

The selection of heat source model is very important to accurately predict the distribution of temperature field and melting pool geometry in the numerical modeling of additive manufacturing process.The surface model,volumetric model and double-ellipsoid model are selected for comparison and analysis.These three heat source models are progarmmed as user-defined subroutines with Abaqus/Standard simulation software to predict the peak temperature and melting pool geometry during selective laser melting(SLM)of IN625.The comparison between simulation and experimental results shows that double-ellipsoid model can predict the melting pool geometry well,while the volumetric model provides comparative peak temperature predictions.In contrast,the surface model exhibits significant deviations in both melting pool geometry and peak temperature.The findings in this research highlight the need for model calibration or modification to enhance efficiency and accuracy before further research can be conducted.