Advanced in situ and ex situ characterization


We use advanced ex situ and in situ methods, e.g. HR-TEM, synchrotron and neutron diffraction, for the characterization of the materials. We have developed sophisticated experimental setups with which we can mimic beam-based additive manufacturing (AM) conditions with small material quantities. We apply in situ charactertechniques such as optical emission spectroscopy or high-speed imaging for a better understanding of laser-based manufacturing processes.




Key publications

  • M. Bacak, J. Valsecchi, J. Capek, E. Polatidis, A. Kaestner, I. Kruk, A. Arabi-Hashemi C. Leinenbach, A. Long, A. Tremsin, E. Watkins, S. Vogel, M. Strobl, Neutron dark-field imaging applied to deformation-induced phase transitions and porosity in additive manufactured steels, Materials & Design 195 (2020) 109009
  • Arabi-Hashemi, E. Polatidis, M. Smid, T. Panzner, C. Leinenbach, Grain orientation dependence of the forward and reverse fcc ↔ hcp transformation in FeMnSi-based shape memory alloys studied by in situ neutron diffraction, Materials Science and Engineering A, 782 (2020) 139261
  • Kenel, D. Grolimund, X. Li, V.A. Samson, D. Ferreira Sanchez, C. Leinenbach, Study of phase transformations in Ti-6Al-4V under additive manufacturing conditions combining laser melting with in situ high-speed X-ray diffraction, Scientific Reports 7 (2017) 16358
  • Mohanta, M. Leistner, M. Leparoux, Influence of temporal and spectral profiles of lasers on weld quality of titanium, Optics and Lasers in Engineering 134 (2020) 106173.
  • Mohanta, M. Leparoux, Spectroscopic investigation of laser produced plasma of carbon nanotube reinforced AlMg5 metal matrix nanocomposites, Optics and Lasers in Engineering 121 (2019) 37-45.
  • C. Popescu, C. Delval, M. Leparoux, Control of Porosity and Spatter in Laser Welding of Thick AlMg5 Parts Using High-Speed Imaging and Optical Microscopy, Metals 2017, 7, 452.