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

In the pursuit of lighter materials and optimized thin-walled components for transportation, knowledge about the characteristic ductile damage mechanisms in metal sheets is key. For the highly application-relevant bi-axial loading with load path changes, the strain-damage interaction is not understood. Thus, our proposal aims at three-dimensional (3D) imaging of the microstructure inside flat sheet specimens evolving during material testing under such loads. For this, we extend the capability of in situ synchrotron laminography to overcome inherent insufficience of other 3D techniques for such kind of samples. It shall be developed into a unique multiscale approach from a few hundred micrometers down to nanometer scale to determine the ductile damage nucleation and growth kinetics. Such hierarchical 3D data will serve as valuable input for microscopic simulations and the formulation and validation of continuum damage models suited to predict engineering-relevant mechanical properties.

• DFG Programme: Research Grants
• International Connection: France
• Major Instrumentation: Microscopy setup for LAMINO II
• Instrumentation Group: 5000 Labormikroskope
• Co-Investigators: Dr. Alexey Ershov; Dr. Tomas Faragó; Dr. Daniel Hänschke; Dr. Marcus Zuber
• Cooperation Partner: Professor Dr. Thilo F. Morgeneyer