Contribution to a conference proceedings/Contribution to a book

PUBDB-2023-04161

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of ring-shaped laser beam during welding of AW-5083 and AW-6082

Hollatz, S.Extern* ; Hummel, M.Extern* ; Lach, M.-C.Extern* ; Olowinsky, A.Extern* ; Gillner, A.Extern* ; Häfner, C. ; Beckmann, F.HZG*Hereon* ; Moosmann, J.HZG*Hereon* ; Kleine, K. R. (Editor) ; Kaierle, S. (Editor)

2023
SPIE

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Please use a persistent id in citations: doi:10.1117/12.2649092

Abstract: The ongoing development of lasers with integrated beam-shaping features offers new opportunities for research in the field of laser beam welding. Main challenges for laser welding of aluminum alloys, such as AW-5083 or AW-6082, are pore formation and cracking. The locally adapted power distribution has a major influence on the keyhole required for deep penetration welding and therefore on occurring weld defects. To determine the reasons, the use of synchrotron radiation during the welding process enables the visibility of the keyhole shape. This investigation contains an analysis of the keyhole and melt pool shape based on the high-speed video images of the synchrotron radiation. The variation of the power ratio of center beam to ring allows a comparison of the influence of the beam shaping method. To stabilize the keyhole, a temporal power modulation is used for the ring. The results show an influence of the ring mode on the keyhole depth and the melt pool shape. The videos allow an analysis of different mechanisms for pore formation, such as the collapse of the keyhole.

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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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