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• W2897280870 abstract "The understanding of phenomena responsible for defects in the solidified welded joint is still a major issue. Very few 3D numerical models have been proposed to study heat transfer and fluid flow during laser welding process. Indeed, the modeling of vaporization effects and keyhole instabilities requires particular numerical methods and developments. For that purpose, a model is developed in order to offer an adaptive and predictive tool, using the commercial code Comsol Multiphysics®. The model takes into account the three phases, namely: the vaporized metal in the keyhole with the plume generation, the liquid metal in the melt pool and the solid metal base. The coupled energy and momentum equations are solved in the three phases. The free surface of the keyhole is tracked with the fixed mesh level set method. The phase change during vaporization is treated with an original approach. Results obtained with the complete model are analyzed in a 3D configuration representing a fusion line and compared to experiments. Then, some feasibility tests are carried out in industrial configurations.The understanding of phenomena responsible for defects in the solidified welded joint is still a major issue. Very few 3D numerical models have been proposed to study heat transfer and fluid flow during laser welding process. Indeed, the modeling of vaporization effects and keyhole instabilities requires particular numerical methods and developments. For that purpose, a model is developed in order to offer an adaptive and predictive tool, using the commercial code Comsol Multiphysics®. The model takes into account the three phases, namely: the vaporized metal in the keyhole with the plume generation, the liquid metal in the melt pool and the solid metal base. The coupled energy and momentum equations are solved in the three phases. The free surface of the keyhole is tracked with the fixed mesh level set method. The phase change during vaporization is treated with an original approach. Results obtained with the complete model are analyzed in a 3D configuration representing a fusion line and compared to exp..." @default.
• W2897280870 created "2018-10-26" @default.
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• W2897280870 date "2015-01-01" @default.
• W2897280870 modified "2023-09-26" @default.
• W2897280870 title "3D heat and fluid flow modeling of keyhole laser welding and experimental validation" @default.
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• W2897280870 doi "https://doi.org/10.2351/1.5063185" @default.
• W2897280870 hasPublicationYear "2015" @default.
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