Microstructure Physics and Alloy Design
The department conducts basic research on the relationship between synthesis, processing, microstructure and properties of compositionally and structurally complex materials. Emphasis lies on nanostructured alloys based on iron, magnesium, titanium, nickel, intermetallics and metal-matrix composites which are characterized by a large variety of phase transformations, kinetics and defect substructures. We apply advanced characterization methods from the single atom level up to the macroscopic scale together with multiscale simulation methods, focusing on mechanical structure-property relations. Our preferred experimental tools are local electrode atom probe tomography (APT) correlated with transmission electron microscopy (TEM), cross-correlation EBSD (electron backscatter diffraction) and 3D EBSD methods , electron chaneling contrast imaging (ECCI) under controlled diffraction conditions, and in-situ micromechanical experiments correlated to local strain mapping and micromechanical simulations. Our modeling tools have been rendered into the modular freeware simulation package DAMASK (Düsseldorf Advanced Material Simulation Kit) which is a hierarchically structured model of material point behaviour for the solution of elastoplastic boundary value problems along with damage and thermal effects. Our approaches and main topics are shown in Fig. 1. Some of the most exiting scientiﬁc fields currently pursued are shown in Fig. 2.
The department is organized in scientific groups some of which are extramurally funded and hence non-permanent.
- Theory & Simulation
- Microscopy & Diffraction
- Mechanism-based Alloy Design
- Combinatorial Metallurgy & Processing
- Atom Probe Tomography (sponsored by Leibniz Award)
- Alloys for Additive Manufacturing (cooperation Max-Planck - Fraunhofer Gruppe)
- Adaptive Structural Materials (sponsored by ERC)
- Materials Science of Mechanical Contacts (sponsored by BMBF)
- Interface Design in Solar Cells (sponsored by BMBF, now at RWTH Aachen "Nanocharacterization for Advanced Functional Materials")
- Biological Composites (sponsored by DFG and Leibniz Award)