In-Situ X-ray Laminography with Bi-axial Loads for the Multiscale Investigation of Damage Formation in Materials for Transportation

• Applicants: Professor Dr. Tilo Baumbach; Dr.-Ing. Lukas Helfen
• Subject Area: Mechanical Properties of Metallic Materials and their Microstructural Origins ; Image and Language Processing, Computer Graphics and Visualisation, Human Computer Interaction, Ubiquitous and Wearable Computing ; Physical Chemistry of Solids and Surfaces, Material Characterisation
• Term: from 2017 to 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 391911929

• Final Report Year: 2025

Final Report Abstract

Light-weight materials play a crucial role in transportation and other aspects of daily life, aluminum alloys for the lightweight construction of airplanes, vehicles or trains are just one example. Such sheet-like components ideally should be highly resilient to withstand the forces they are subjected to, while at the same time maintaining minimum weight to reduce energy consumption. Furthermore, during material forming and in service loading, mechanical loading directions, i.e., the direction of the mentioned forces, can change. The effect of such load path changes on the integrity of the structure was unknown. Thus, in order to optimize such materials, the aim of the LAMBDA-project was to better understand fundamental damage mechanisms, in particular, in aluminum alloy sheets under load path changes. X-ray imaging methods are essential characterization tools for such investigations in materials science and other research fields. However, before this project, no suitable instruments or techniques existed to study the response of flat, sheet-like samples under external forces. Therefore, a key objective of the project was to design devices that could apply loading conditions close to real-world scenarios to these samples, along with developing methods to capture their internal structure and response in 3D at various length scales and resolutions.

Publications

• In situ observation of damage evolution in alloy sheet materials via synchrotron micro- and nanolaminography. 17th International Conference on Aluminum Alloys ICAA17, Oct 2020, Grenoble, France
  Lukas Helfen, Thilo F. Morgeneyer, Mathias Hurst, Andrei Shkarin, Xiang Kong, Ante Buljac, François Hild, Heikki Suhonen, Jussi-Petteri Suuronen & Tilo Baumbach
  
• Strain and damage interactions under plane strain conditions: 3D in situ measurements for different microstructures. 17th International Conference on Aluminum Alloys ICAA17, Oct 2020, Grenoble, France
  Thilo F. Morgeneyer, Xiang Kong, Lukas Helfen, François Hild & Ante F. Buljac
  
• Ductile damage of AA2024-T3 under shear loading: Mechanism analysis through in-situ laminography. Acta Materialia, 205, 116556.
  Tancogne-Dejean, Thomas; Roth, Christian C.; Morgeneyer, Thilo F.; Helfen, Lukas & Mohr, Dirk
  
• On crystallographic aspects of heterogeneous plastic flow during ductile tearing: 3D measurements and crystal plasticity simulations for AA7075-T651. International Journal of Plasticity, 144, 103028.
  Morgeneyer, Thilo F.; Khadyko, Mikhail; Buljac, Ante; Helfen, Lukas; Hild, François; Benallal, Ahmed; Børvik, Tore & Hopperstad, Odd S.
  
• 3D in situ study of damage during a ‘shear to tension’ load path change in an aluminium alloy. Acta Materialia, 231, 117842.
  Kong, Xiang; Helfen, Lukas; Hurst, Mathias; Hänschke, Daniel; Missoum-Benziane, Djamel; Besson, Jacques; Baumbach, Tilo & Morgeneyer, Thilo F.
  
• Guided hierarchical in situ X-ray nano-laminography enabling the investigation of damage nucleation in alloy sheets. German Conference for Research with Synchrotron Radiation, Neutrons and Ion Beams at Large Facilities (SNI), Sep 2022, Berlin, Germany
  Mathias Hurst, Lukas Helfen, Thilo F. Morgeneyer, Heikki Suhonen, Jussi-Petteri Suuronen, Ante Buljac, Francois Hild, Tilo Baumbach & Daniel Hänschke
  
• Hierarchical region-of-interest tracking for in situ nano-scale X-ray laminography. 5th International Conference on Tomography of Materials & Structures (ICTMS), Jul 2022, Grenoble, France
  Mathias Hurst, Lukas Helfen, Thilo F. Morgeneyer, Daniel Hänschke, Jussi-Petteri Suuronen, Heikki Suhonen & Tilo Baumbach
  
• A polycrystalline damage model applied to an anisotropic aluminum alloy 2198 under non-proportional load path changes. International Journal of Plasticity, 168, 103674.
  Kong, Xiang; Morgeneyer, Thilo F.; Missoum-Benziane, Djamel & Rousselier, Gilles
  
• Hierarchically guided in situ nanolaminography for the visualisation of damage nucleation in alloy sheets. Scientific Reports, 13(1).
  Hurst, Mathias; Helfen, Lukas; Morgeneyer, Thilo F.; Suhonen, Heikki; Buljac, Ante; Hild, François; Suuronen, Jussi-Petteri; Baumbach, Tilo & Hänschke, Daniel
  
• In-situ Laminography Experiments on AA2198-T8R: Ductile Fracture Mechanisms from Shear to Biaxial Tension. ANNUAL TECHNICAL MEETING, 2023 SOCIETY OF ENGINEERING SCIENCE, Oct 2023, Minnesota (USA)
  Christian C Roth, Thomas Tancogne-Dejean, Xiang Kong, Thilo F. Morgeneyer & Dirk Mohr
  
• LAMINO-II: The New Member of the 3D Lamino-graphic Imaging Portfolio. 15th Conference of High Resolution X-ray Diffraction and Imaging (XTOP2024), Mar 2023, Carry-le-Rouet, France
  Daniel Hänschke, Elias Hamann, Mathias Hurst, Marcus Zuber, Simon Bode, Tomas Farago, Angelica Cecilia, Lukas Helfen & Tilo Baumbach
  
• Plasticity and ductility of an anisotropic recrystallized AA2198 Al-Cu-Li alloy in T3 and T8 conditions during proportional and non-proportional loading paths: simulations and experiments. Journal of Theoretical, Computational and Applied Mechanics.
  Kong, Xiang; Chen, Jianqiang; Madi, Yazid; Missoum-Benziane, Djamel; Besson, Jacques & Morgeneyer, Thilo
  
• Ductile shear damage micromechanisms studied by correlative multiscale nanotomography and SEM/EBSD for a recrystallized aluminum alloy 2198 T8. Journal of Materials Science, 59(29), 13690-13708.
  Kong, Xiang; Hurst, Mathias; Helfen, Lukas; Gaslain, Fabrice; Baumbach, Tilo; Suhonen, Heikki & Morgeneyer, Thilo F.
  
• Multiscale in situ X-ray laminography enabling the observation of damage formation in alloy sheets. 15th International Conference on Synchrotron Radiation Instrumentation (SRI), Aug 2024, Hamburg, Germany
  Mathias Hurst, Thilo F. Morgeneyer, Lukas Helfen, Xiang Kong, Daniel Hänschke & Tilo Baumbach
  
• Plasticity during ductile tearing: crystallographic and dynamic strain aging effects. 19 th European Mechanics of Materials Conferences, S12: Experimental mechanics and microstructural characterization, May 2024, Madrid, Spain
  Thilo F. Morgeneyer
  
• Plasticity during ductile tearing: crystallographic and dynamic strain aging effects. 19th European Mechanics of Materials Conferences, symposium on fracture, May 2024, Madrid, Spain
  Thilo F. Morgeneyer