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| Home > Documents in process > The influence of different core-ring intensity distributions on the capillary shape and resulting weld in laser welding of steel |
| Home > Documents in process > The influence of different core-ring intensity distributions on the capillary shape and resulting weld in laser welding of steel |
| Journal Article | PUBDB-2026-00617 |
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2026
Elsevier Science
Amsterdam [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.optlastec.2025.114495
Abstract: Laser welding was carried out using a co-axial core-ring beam, with independent control of the power to the coreand the ring. The welding process was observed using high-power X-rays and high-speed imaging equipment.Adjusting the relative powers of the core and the ring beams was found to have profound effects on the shape ofboth the capillary created and the weld melt pool. Moderate laser power densities in the ring were found toincrease the top diameter of the weld pool and reduce fluctuations in the welding process. High laser powerdensities in the ring led to the creation of a second capillary which largely acted independently of the capillarygenerated by the laser power in the core. At high power densities and welding speeds the two capillaries werealmost completely separated in the direction of travel.
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