1. 3D heat transfer model of hybrid laser Nd : Yag-MAG welding of a S355 steel and experimental validation
- Author
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Rémy Fabbro, Muriel Carin, Frédéric Coste, Philippe Le Masson, Emilie Le Guen, Laboratoire d'Ingénierie des Matériaux de Bretagne (LIMATB), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université de Brest (UBO), Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, and HESAM Université (HESAM)-HESAM Université (HESAM)
- Subjects
0209 industrial biotechnology ,Heat-affected zone ,Materials science ,Mécanique: Thermique [Sciences de l'ingénieur] ,02 engineering and technology ,Welding ,Laser Hybrid Nd Yag ,Electric resistance welding ,7. Clean energy ,law.invention ,Gas metal arc welding ,Physics::Geophysics ,020901 industrial engineering & automation ,law ,Composite material ,Fluid Flow and Transfer Processes ,Mathematics::Complex Variables ,Mechanical Engineering ,Modeling ,Laser beam welding ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Mathematics::Geometric Topology ,Statistics::Computation ,Surface deformation ,Weld pool ,[SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph] ,[PHYS.MECA.THER]Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph] ,Physics::Accelerator Physics ,Melt pool ,Arc welding ,MAG arc welding ,0210 nano-technology ,Keyhole - Abstract
International audience; A three-dimensional heat transfer model was developed to predict the temperature fields, the weld geometry and the shape of the solidified weld reinforcement surface during hybrid laser-MAG arc welding of fillet joints. Melt pool deformation due to arc pressure was calculated by minimizing the total surface energy. A series of hybrid welding experiments was conducted on S355 steel for different welding speeds and wire feeding rates. A high speed video camera was used to measure weld pool depression and surface weld pool geometry. Visualization of the weld pool during welding has also allowed for a better understanding of the interaction between the keyhole and droplets. The various weld bead shapes were explained through these observations. The arc pressure, the surface energy distribution, and arc efficiency were evaluated by comparing experimental data and numerical results for a wide range of welding operating parameters. Good correlation was found between the calculated and experimental weld bead shapes obtained for the hybrid laser-MAG arc welding process as well as for laser or MAG alone.
- Published
- 2011
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