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@ARTICLE{Hollatz:481486,
      author       = {Hollatz, S. and Hummel, M. and Olowinsky, A. and Gillner,
                      A. and Beckmann, F. and Moosmann, J.},
      title        = {{P}ore formation and melt pool analysis of laser welded
                      {A}l-{C}u joints using synchrotron radiation},
      journal      = {Journal of materials processing technology},
      volume       = {309},
      issn         = {0924-0136},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2022-04389},
      pages        = {117738},
      year         = {2022},
      abstract     = {Known as challenging material combination, the welding of
                      aluminium and copper, both with strongly different
                      thermophysical properties, causes joining failures such as
                      pores, cracks or intermetallic phases in the solidified
                      welding area. To investigate the mixing of the materials and
                      the occurrence of pores, the laser welding process is
                      observed with synchrotron radiation which visualizes the
                      phase boundaries between solid, liquid and gaseous material
                      phases. This allows the visualization of pore formation and
                      density differences of the materials inside the melt pool.
                      In this investigation, pore formation in front and bottom of
                      the keyhole is observed. The movement of the bubbles in the
                      melt pool can be tracked until solidification at the
                      material transition. Regarding the intermixing of the
                      materials, the high-speed images show a fluctuating copper
                      flow towards the keyhole and a material mixing over the
                      entire aluminium melt pool depth. By understanding the
                      mechanisms, compensatory measures for an improved process
                      can be developed to enable the usability of aluminium and
                      copper connections, for example in electromobility
                      applications.},
      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: I-20191140
                      (I-20191140)},
      pid          = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20191140},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000888575200001},
      doi          = {10.1016/j.jmatprotec.2022.117738},
      url          = {https://bib-pubdb1.desy.de/record/481486},
}