Iñigo Hernando - Academia.edu (original) (raw)
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A numerical model was developed for predicting the bead geometry and microstructure 10 in Laser B... more A numerical model was developed for predicting the bead geometry and microstructure 10 in Laser Beam Welding of 2 mm thickness Inconel 718 sheets. The experiments were carried out 11 with a 1 kW maximum power fiber laser coupled with a galvanometric scanner. Wobble strategy 12 was employed for sweeping 1 mm wide circular areas for creating the weld seams and a specific 13 tooling was manufactured for supplying protective Argon gas during the welding process. The 14 numerical model takes into account both the laser beam absorption and the melt-pool fluid 15 movement along the bead section, resulting in a weld geometry that depends on the process input 16 parameters, such as feed rate and laser power. The microstructure of the beads was also estimated 17 based on the cooling rate of the material. Features as bead upper and bottom final shapes, weld 18 penetration and dendritic arm spacing were numerically and experimentally analyzed and 19 discussed. The results given by the numerical...
A numerical model was developed for predicting the bead geometry and microstructure 10 in Laser B... more A numerical model was developed for predicting the bead geometry and microstructure 10 in Laser Beam Welding of 2 mm thickness Inconel 718 sheets. The experiments were carried out 11 with a 1 kW maximum power fiber laser coupled with a galvanometric scanner. Wobble strategy 12 was employed for sweeping 1 mm wide circular areas for creating the weld seams and a specific 13 tooling was manufactured for supplying protective Argon gas during the welding process. The 14 numerical model takes into account both the laser beam absorption and the melt-pool fluid 15 movement along the bead section, resulting in a weld geometry that depends on the process input 16 parameters, such as feed rate and laser power. The microstructure of the beads was also estimated 17 based on the cooling rate of the material. Features as bead upper and bottom final shapes, weld 18 penetration and dendritic arm spacing were numerically and experimentally analyzed and 19 discussed. The results given by the numerical...