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Comparison of ex situ x-ray tomography and in situ monitoring to gain control over defects during laser welding

Thursday (27.09.2018)
17:30 - 17:45 S1/01 - A03
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Like in any other welding technique, creation of pores and defects during laser welding can lead to component failure and thus cannot be tolerated. Post-built inspection is required to make sure the printed parts are defects-free. These inspections can take time and are complicated in case of large parts. A solution is to use in situ process monitoring to detect the creation of defects, which could in turn be corrected during the printing itself. However, the relationship between pores creation and in situ monitoring still need to be understood. In this work, we use x-ray computed tomography to detect pores and correlate them to pyrometry and high speed thermal imaging signal. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

Dipl.-Ing. Jean-Baptiste Forien
Lawrence Livermore National Laboratory
Additional Authors:
  • Philip Depond
    Lawrence Livermore National Laboratory
  • Dr. Gabe Guss
    Lawrence Livermore National Laboratory
  • Bradley Jared
    Sandia National Laboratories
  • Jonathan Madison
    Sandia National Laboratories
  • Elena Garlea
    Y-12 National Security Complex
  • Hahn Choo
    University of Tennessee
  • Manyalibo Matthews
    Lawrence Livermore National Laboratory