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@ARTICLE{Wagner:460499,
      author       = {Wagner, Jonas and Hagenlocher, Christian and Hummel, Marc
                      and Olowinsky, Alexander and Weber, Rudolf and Graf, Thomas},
      title        = {{S}ynchrotron {X}-ray {A}nalysis of the {I}nfluence of the
                      {M}agnesium {C}ontent on the {A}bsorptance during
                      {F}ull-{P}enetration {L}aser {W}elding of {A}luminum},
      journal      = {Metals},
      volume       = {11},
      number       = {5},
      issn         = {2075-4701},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {PUBDB-2021-02964},
      pages        = {797 (1-12)},
      year         = {2021},
      abstract     = {Full-penetration laser beam welding is characterized by a
                      weld seam whose depth equals the material thickness. It is
                      associated with a stable capillary and is therefore widely
                      used for welding of sheet metal components. The realization
                      of lightweight concepts in car body production requires the
                      application of high-strength aluminum alloys that contain
                      magnesium as an alloying element, which significantly
                      influences the evaporation temperature and pressure. This
                      change of the evaporation processes influences the geometry
                      of the capillary and therefore its absorptance. In order to
                      quantify the influence of magnesium on the capillary, their
                      geometries were captured by means of high-speed synchrotron
                      X-ray imaging during the welding process of the aluminum
                      alloys AA1050A (Al99.5), AA5754 (AlMg3) and AA6016
                      (AlSi1.2Mg0.4). The 3D-geometries of the capillaries were
                      reconstructed from the intensity distribution in the
                      recorded X-ray images and their absorptance of the incident
                      laser beam was determined by the analysis of the
                      reconstructed 3D-geometry with a raytracing algorithm. The
                      results presented in this paper capture for the first time
                      the influence of the magnesium content in high-strength
                      aluminum alloys on the aspect ratio of the capillary, which
                      explains the reduced absorptance in case of full-penetration
                      laser beam welding of aluminum alloys with a high content of
                      volatile elements. In order to improve the absorptance in
                      full-penetration welding, these findings provide the
                      information required for the deduction of new optimization
                      approaches.},
      cin          = {DOOR ; HAS-User / RWTH},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)RWTH-20160601},
      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:000662483500001},
      doi          = {10.3390/met11050797},
      url          = {https://bib-pubdb1.desy.de/record/460499},
}