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@ARTICLE{Reinheimer:633244,
      author       = {Reinheimer, Eveline Nicole and Haas, Michael and Zaiß,
                      Felix and Omlor, Markus and Spurk, Christoph and Olowinsky,
                      Alexander and Beckmann, Felix and Moosmann, Julian and
                      Hagenlocher, Christian and Weber, Rudolf and Graf, Thomas},
      title        = {{A}voiding the formation of pores during laser welding of
                      copper hairpins by dynamic beam shaping},
      journal      = {The international journal of advanced manufacturing
                      technology},
      volume       = {137},
      number       = {5-6},
      issn         = {0268-3768},
      address      = {London},
      publisher    = {Springer},
      reportid     = {PUBDB-2025-02370},
      pages        = {2257 - 2266},
      year         = {2025},
      abstract     = {Any pores formed during laser welding of copper hairpins
                      affect the structural integrity and the
                      mechanical/electrical functionality of the joint. We report
                      on investigations using synchrotron X-ray imaging techniques
                      to observe the formation of the pores in the processing zone
                      while welding. It was found that all pores are formed at the
                      joint gap and that the small pores are distributed
                      throughout the complete joint volume as a result of the melt
                      flow induced by the movement of the laser beam. This insight
                      has led to the development of a welding strategy that
                      minimizes pore formation by avoiding the movement of the
                      laser beam across the joint gap. This was achieved by rapid
                      beam shaping based on coherent beam combining (CBC)
                      technology.},
      cin          = {DOOR ; HAS-User / Hereon},
      ddc          = {670},
      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) / DFG project
                      G:(GEPRIS)236616214 - SFB 1120: Bauteilpräzision durch
                      Beherrschung von Schmelze und Erstarrung in
                      Produktionsprozessen (236616214) / 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)236616214 / G:(GEPRIS)260036706},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1007/s00170-025-15236-0},
      url          = {https://bib-pubdb1.desy.de/record/633244},
}