Towards the effective crack resistance of real microstructures: phase-field numerical experiments based on micro-CT data from AlSi10Mg foams and EBSD data from a hybrid WAAM 17-4PH/316L steel

  • Schlüter, Alexander (Technical University of Darmstadt)
  • Hoffmann, Marc Alexander (RPTU University Kaiserslautern-Landau)
  • Blinn, Bastian (RPTU University Kaiserslautern-Landau)
  • Mevert, Jannes (Leibniz University Hannover)
  • Schäfke, Florian Patrick (Leibniz University Hannover)
  • Klose, Christian (Leibniz University Hannover)
  • Maier, Hans Jürgen (Leibniz University Hannover)
  • Harbusch, Sven (RPTU University Kaiserslautern-Landau)
  • Beck, Tilmann (RPTU University Kaiserslautern-Landau)
  • Triebe, Adrian (RPTU University Kaiserslautern-Landau)
  • Kerscher, Eberhard (RPTU University Kaiserslautern-Landau)
  • Müller, Ralf (Technical University of Darmstadt)

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The numerical crack-growth experiment of Hossain et al. determines an effective crack resistance of a heterogeneous material by driving a crack through an explicitly resolved microstructure with surfing boundary conditions while recording the boundary J-integral. Here the methodology, previously applied to idealised porous and inclusion-type microstructures, is transferred to two real materials: powder-metallurgically produced AlSi10Mg foams, whose morphology is taken from X-ray micro-computed tomography and fractured with a three-dimensional brittle phase-field model, and a hybrid wire arc additively manufactured wall with a transition from 316L to 17-4PH, whose grain structure and crystal orientations are taken from electron backscatter diffraction (EBSD) and modelled in two dimensions with grain-wise rotated cubic single-crystal stiffness. The image-to-simulation pipelines and first results for both materials are presented.