Changizi, R.; Zaefferer, S.; Abdellaoui, L.; Scheu, C.: Effects of Defect Density on Optical Properties Using Correlative Cathodoluminescence and Transmission Electron Microscopy Measurements on Identical PrNbO4 Particles. ACS Applied Electronic Materials 4 (4), pp. 2095 - 2100 (2022)
Zhu, C.; Kurniawan, C.; Ochsendorf, M.; An, D.; Zaefferer, S.; De Graef, M.: Orientation, pattern center refinement and deformation state extraction through global optimization algorithms. Ultramicroscopy 233, 113407 (2022)
Tsai, S.-P.; Konijnenberg, P. J.; Gonzalez, I.; Hartke, S.; Griffiths, T. A.; Herbig, M.; Kawano-Miyata, K.; Taniyama, A.; Sano, N.; Zaefferer, S.: Development of a new, fully automated system for electron backscatter diffraction (EBSD)-based large volume three-dimensional microstructure mapping using serial sectioning by mechanical polishing, and its application to the analysis of special boundaries in 316L stainless steel. Review of Scientific Instruments 93, 093707 (2022)
Nandy, S.; Tsai, S.-P.; Stephenson, L.; Raabe, D.; Zaefferer, S.: The role of Ca, Al and Zn on room temperature ductility and grain boundary cohesion of magnesium. Journal of Magnesium and Alloys 9 (5), pp. 1521 - 1536 (2021)
Varanasi, R. S.; Zaefferer, S.; Sun, B.; Ponge, D.: Localized deformation inside the Lüders front of a medium manganese steel. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing 824, 141816 (2021)
Zhang, J.; Zaefferer, S.: Influence of sample preparation on nanoindentation results of twinning-induced plasticity steel. International Journal of Minerals, Metallurgy and Materials 28, pp. 877 - 887 (2021)
Guo, X.; Zaefferer, S.; Archie, F. M. F.; Bleck, W.: Hydrogen effect on the mechanical behaviour and microstructural features of a Fe–Mn–C twinning induced plasticity steel. International Journal of Minerals, Metallurgy and Materials 28, pp. 835 - 846 (2021)
An, D.; Zhang, X.; Zaefferer, S.: The combined and interactive effects of orientation, strain amplitude, cycle number, stacking fault energy and hydrogen doping on microstructure evolution of polycrystalline high-manganese steels under low-cycle fatigue. International Journal of Plasticity 134, 102803 (2020)
An, D.; Zhao, H.; Sun, B.; Zaefferer, S.: Direct observations of collinear dislocation interaction in a Fe–17.4 Mn–1.50 Al–0.29 C (wt.%) austenitic steel under cyclic loading by in-situ electron channelling contrast imaging and cross-correlation electron backscatter diffraction. Scripta Materialia 186, pp. 341 - 345 (2020)
An, D.; Krieger, W.; Zaefferer, S.: Unravelling the effect of hydrogenon microstructure evolution under low-cycle fatigue in a high-manganese austenitic TWIP steel. International Journal of Plasticity 126, 102625 (2020)
Hydrogen in aluminium can cause embrittlement and critical failure. However, the behaviour of hydrogen in aluminium was not yet understood. Scientists at the Max-Planck-Institut für Eisenforschung were able to locate hydrogen inside aluminium’s microstructure and designed strategies to trap the hydrogen atoms inside the microstructure. This can…
The goal of this project is the investigation of interplay between the atomic-scale chemistry and the strain rate in affecting the deformation response of Zr-based BMGs. Of special interest are the shear transformation zone nucleation in the elastic regime and the shear band propagation in the plastic regime of BMGs.
“Smaller is stronger” is well known in micromechanics, but the properties far from the quasi-static regime and the nominal temperatures remain unexplored. This research will bridge this gap on how materials behave under the extreme conditions of strain rate and temperature, to enhance fundamental understanding of their deformation mechanisms. The…
Hydrogen embrittlement (HE) of steel is a great challenge in engineering applications. However, the HE mechanisms are not fully understood. Conventional studies of HE are mostly based on post mortem observations of the microstructure evolution and those results can be misleading due to intermediate H diffusion. Therefore, experiments with a…
Smaller is stronger” is well known in micromechanics, but the properties far from the quasi-static regime and the nominal temperatures remain unexplored. This research will bridge this gap on how materials behave under the extreme conditions of strain rate and temperature, to enhance fundamental understanding of their deformation mechanisms. The…
Biological materials in nature have a lot to teach us when in comes to creating tough bio-inspired designs. This project aims to explore the unknown impact mitigation mechanisms of the muskox head (ovibus moschatus) at several length scales and use this gained knowledge to develop a novel mesoscale (10 µm to 1000 µm) metamaterial that can mimic the…
Microbiologically influenced corrosion (MIC) of iron by marine sulfate reducing bacteria (SRB) is studied electrochemically and surfaces of corroded samples have been investigated in a long-term project.