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@INPROCEEDINGS{Hollatz:587135,
      author       = {Hollatz, Soeren and Hummel, Marc and Lach, Marie-Cathrin
                      and Olowinsky, Alexander and Gillner, Arnold and Häfner,
                      Constantin and Beckmann, Felix and Moosmann, Julian},
      editor       = {Kleine, Klaus R. and Kaierle, Stefan},
      title        = {{I}nfluence of ring-shaped laser beam during welding of
                      {AW}-5083 and {AW}-6082},
      volume       = {12414},
      publisher    = {SPIE},
      reportid     = {PUBDB-2023-04161},
      pages        = {124140C},
      year         = {2023},
      comment      = {High-Power Laser Materials Processing: Applications,
                      Diagnostics, and Systems XII : [Proceedings] - SPIE, 2023. -
                      ISBN 97815106593399781510659346 - doi:10.1117/12.2649092},
      booktitle     = {High-Power Laser Materials Processing:
                       Applications, Diagnostics, and Systems
                       XII : [Proceedings] - SPIE, 2023. -
                       ISBN 97815106593399781510659346 -
                       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.},
      month         = {Jan},
      date          = {2023-01-28},
      organization  = {High-Power Laser Materials Processing:
                       Applications, Diagnostics, and Systems
                       XII, San Francisco (United States), 28
                       Jan 2023 - 3 Feb 2023},
      cin          = {DOOR ; HAS-User / Hereon},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)Hereon-20210428},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal:
                      BAG-20211050 (BAG-20211050) / SFB 1120 A01 - Steuerung von
                      Geometrie und Metallurgie beim Laserstrahl-Mikroschweißen
                      durch Beeinflussung der Schmelzbaddynamik über örtlich und
                      zeitlich angepassten Energieeintrag (A01) (260036706)},
      pid          = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)BAG-20211050 /
                      G:(GEPRIS)260036706},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.1117/12.2649092},
      url          = {https://bib-pubdb1.desy.de/record/587135},
}