The influence of superimposed intensity distributions on the number of generated spatters, the capillary shape, and the melt flows in the melt pool during laser welding of mild steel was investigated using online high-speed X-Ray imaging. A change of the shape of the capillary was observed for different superimposed intensity distributions. A change in the size of the eddies in the melt pool was observed for welds with different amounts of generated spatters and a concentration of the streamlines of the flow field at the upper rear part of the capillary was observed for a high number of generated spatters, coinciding with the location of the generation of the spatters.
REFERENCES
1.
Nagel
, F.
, Stambke
, M.
, Bergmann
, J.P.
(2016
) Reduction of spatter formation by superposition of two laser intensities
, in Proceedings of the 35th International Congress on Applications of Laser and Electro-Optics (ICALEO
), San Diego, USA
2.
Nagel
, F.
, Drechsel
, C.
, Bergmann
, J.P.
(2017
) Reduction of the spatter formation due to the use of superposition of two laser intensities
, in Proceedings of the Lasers in Manufacturing Conference (LiM
), Munich, Germany
.3.
Fabbro
, R.
, Slimani
, S.
, Doudet
, I.
, Coste
, F.
, Briand
, F.
(2006
) Experimental study of the dynamical coupling between the induced vapour plume and the melt pool for Nd–Yag CW laser welding
, Journal of Physics D: Applied Physics
39
, 394
–400
4.
Kamimuki
, K.
, Inoue
, T.
, Yasuda
, K.
, Muro
, M.
, Nakabayashi
, T.
, Matsunawa
, A.
(2002
) Prevention of the welding defect be side gas flow and its monitoring method in continuous wave Nd:Yag laser welding
, Journal of Laser Applications
14
, 136
–145
5.
Börner
, Ch.
; Rominger
, V.
; Harrer
, T.
; Dilger
, K.
; et al (2011
) Influence of ambient pressure on spattering and weld seam quality in laser beam welding with the solid-state laser
, in Proceedings of the 30th International Congress on Applications of Lasers & Electro-Optics (ICALEO
), Orlando, USA
6.
Rominger
, V.
, Harrer
, T
, Keßler
, S.
, Braun
, H.
, Dorsch
, F.
, Abt
, F.
, Jarwitz
, M.
, Heider
, A.
, Weber
, R.
, Graf
, T.
(2012
) Formation mechanism of process instabilities and strategies to improve welding quality
. in Proceedings of the 31st International Congress on Applications of Laser and Electro-Optics (ICALEO
), Anaheim, USA
7.
Weberpals
, J.-P.
(2010
) Nutzen und Grenzen guter Fokussierbarkeit beim Laserschweißen
, Doctoral Thesis, Utz
, ISBN 978-3-8316-0995-68.
Li
, S.
, Chen
, G.
, Katayama
, S.
, Zhang
, Y.
(2014
) Relationship between spatter formation and dynamic molten pool during high-power deep-penetration laser welding
, Applied Surface Science
303
, 481
–488
9.
Kawahito
, Y.
; Nishimoto
, K.
; Kawakami
, H.
; Katayama
, S.
(2017
) Three-dimensional X-ray transmission in-situ observation of spatter formation and reduction in laser welding of stainless steel
, in Proceedings of the Lasers in Manufacturing Conference (LiM
), Munich, Germany
.10.
Speker
, N.
, Haug
, P.
, Feuchtenbeiner
, S.
, Hesse
, T.
, Havrilla
, D.
(2017
) SPATTER REDUCED HIGH SPEED WELDING WITH DISK LASERS
, in Proceedings of the 36th International Congress on Applications of Laser and Electro-Optics (ICALEO
), Atlanta, USA
11.
Speker
, N.
, Haug
, P.
, Feuchtenbeiner
, S.
, Hesse
, T.
, Havrilla
, D.
(2018
) BrightLine weld-spatter reduced high speed welding with disk lasers
, in Proceedings of SPIE, SPIE Lase
, San Francisco, USA
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