Modeling of weld pool dynamics during dual-beam laser welding process

Hu, Junling; Tsai, Hai-Lung; Lee, Y. K.

doi:10.2351/1.5059970

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…Figure 16 shows the cross-section of tailored blanks and the gray area is the keyhole shape by numerical calculation. The calculated result of the keyholes shape in this paper are good agreement with that of Hu et al [19,20]. It clearly displays that two separate keyholes converged together at the top opening, and the size of keyhole tends to get smaller from top to bottom, which is caused by gradual attenuation of laser power due to the inverse toughening absorption of laser by plasma in the keyholes.…”

Section: Temperature Field Characteristicsupporting

confidence: 89%

“…Some studies on numerical simulation of dual-beam laser welding were carried out. Hu et al [19,20] developed mathematical models to simulate transient heat transfer and weld pool flow in the dual-beam laser welding process. On the basis of Hu's model, Zhou et al [21] further developed a three-dimensional moving heat-flow coupling model, and studied the flow field and temperature field of molten pool under different configurations of lasers (longitudinal arrangement and traverse arrangement) for dual-beam laser welding.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation Analysis of Dual-Beam Laser Welding of Tailored Blanks with Different Thicknesses

Zhang

Chen

et al. 2019

Metals

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In order to meet the requirements of alignment capability, gap tolerance and welding track control, dual-beam laser welding has been put forward to weld tailored blanks with different thicknesses. The arrangement mode and power ratio of dual-beam laser determine the heat transfer and temperature field distribution, and then influence the weld profile and weld quality. In this study, based on consideration of the temperature dependence of material physical properties, convection and radiation heat transfer, and material latent heat, the finite element model was developed. The model validated was conducted to compare with experimental results and it showed good agreement. The arrangement mode and power ratio of dual-beam laser welding were compared and optimized based on the consideration of the weld width on top surface and gap tolerance. Finally, the temperature field characteristics with the preferable process were analyzed in detail according to the numerical simulation. The calculated results indicated the weld width is mainly controlled by the laser irradiation on the thin plate, and dual-beam laser welding of tailored blanks has great advantages on improving heat transfer, weld profile and gap tolerance, which helps to reduce welding defects and enhance welding quality.

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Section: Temperature Field Characteristicsupporting

confidence: 89%