Contribution to a conference proceedings

PUBDB-2023-04160

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of capillary shape on spatter formation during welding with ring-core fiber systems

Zaiss, F. (Corresponding author)Extern* ; Haas, M.Extern* ; Wagner, J.Extern* ; Diegel, C.Extern* ; Schricker, K.Extern* ; Bergmann, J. P.Extern* ; Hummel, M.Extern* ; Olowinsky, A.Extern* ; Beckmann, F.HZG*Hereon* ; Moosmann, J.HZG*Hereon* ; Hagenlocher, C.Extern* ; Graf, T.

2023

Abstract: During laser welding, the formation of spatter results from instabilities of the capillary, which are associated with adverse conditions in the melt flow surrounding the capillary and in the vapor flow at the capillary opening. A change of the characteristics of these flows in the melt pool and in the capillary requires a change of the shape of thecapillary and/or the surrounding melt pool. In order to influence the stabilize the capillary the intensity distribution was varied by means of a ring-core fiber system. Analysis of the resulting welds shows a significant effect of the intensity distribution on the stability of the capillary shape and considerable changes in the melt flow direction and velocity. Thesefindings identified an optimum capillary shape, which results from a specific power share in the ring-core fiber combination.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. Helmholtz-Zentrum Hereon (Hereon)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: BAG-20211050 (BAG-20211050) (BAG-20211050)
3. SFB 1120 A01 - Steuerung von Geometrie und Metallurgie beim Laserstrahl-Mikroschweißen durch Beeinflussung der Schmelzbaddynamik über örtlich und zeitlich angepassten Energieeintrag (A01) (260036706) (260036706)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2023

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