A mathematical model for laser welding with keyhole

Ohji, Tatsuki; Murakami, Eiji; Matsubayashi, Kazuki; Matsuhiro, Yoshiyuki

doi:10.2351/1.5058825

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Kaplan (1994) calculated the keyhole profile by applying a point-bypoint energy balance technique at the keyhole wall and determined the flow of metal vapour inside the keyhole. Ohji et al (1994) developed a model by using the finite difference approximation to analyse the effect of evaporation and the recoil pressure on the keyhole formation numerically. Yilbas et al (1995) examined the laser heating mechanism to understand the initial cavity formation.…”

Section: Introductionmentioning

confidence: 99%

Effects of phase changes on weld pool shape in laser welding

Pecharapa

Kar

1997

J. Phys. D: Appl. Phys.

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A mathematical model is developed to relate the weld depth and width to the laser parameters. The model is based on the Stefan condition for quasi-steady state laser welding. Simple expressions are obtained for the shapes of the solid - liquid and liquid - vapour interfaces. They are found as functions of the laser irradiance, welding speed, absorptivity and thermal diffusivity. Simple expressions for the temperature distributions in the liquid and solid phases are also presented. The results for the weld depths and widths and the temperature distributions in the workpiece are illustrated for various laser intensities and welding speeds. The predictions of this simple model are found to compare well with experimental data and other previous models.

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Section: Introductionmentioning

confidence: 99%