Group Leader

Stefan Zaefferer
Group Leader
Phone: +49 211 6792 803

Key Publications

1.
S. Zaefferer, "On the formation mechanisms, spatial resolution and intensity of backscatter Kikuchi patterns," Ultramicroscopy 107, 254-266 (2007).
2.
H. Sato and S. Zaefferer, "A study on the formation mechanisms of butterfly-type martensite in Fe–30% Ni alloy using EBSD-based orientation microscopy," Acta Materialia 57 (6), 1931-1937 (2009).
3.
Stefan Zaefferer and Nahid Nora Elhami, "Theory and application of electron channelling contrast imaging under controlled diffraction conditions," Acta Materialia 75, 20-50 (2014).
4.
F. Ram, S. Zaefferer, and D. Raabe, "Kikuchi bandlet method for the accurate deconvolution and localization of Kikuchi bands in Kikuchi diffraction patterns," Journal of Applied Crystallography 47, 264-275 (2014).
5.
S. Zaefferer, N. N. Elhami, and P. Konijnenberg, "Electron backscatter diffraction (EBSD) techniques for studying phase transformations in steels", in Phase transformations in steels, edited by E. Pereloma and D.V. Edmonds (Woodhead Publishing, UK, 2012), pp. 557-587.

Microscopy and Diffraction

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Microscopy and Diffraction

The M&D research group is defined through two correlated tasks: on the one hand, we aim at understanding microstructure formation mechanisms and the relation between microstructures and properties of materials by investigations on the microscopic level. To this aim we develop or advance, on the other hand, microscopy and diffraction techniques. Currently the focus lies on techniques in the scanning electron microscope, in particular on the electron diffraction techniques (EBSD, 3D EBSD, XR-EBSD, ECCI). Nevertheless, we do also have expertise in the field of imaging and diffraction in transmission electron microscopy and x-ray diffraction (pole figure measurements). With respect to microstructure formation we pursue questions on deformation, recrystallization and solid-state phase transformations. Concerning microstructure properties the main focus is on mechanical properties, although, in recent years, also corrosion and electronic properties are spotlighted. The spectrum of investigated materials comprises AHS steels of 1st, 2nd, and 3rd generation (DP steels, low alloyed TRIP steels, CP steels, high-Mn steels, Q&P steels), electrical steels, austenitic stainless steels, superalloys, magnesium-, aluminium- and copper alloys, intermetallic compounds (aluminides, Laves phases), and, since shortly, a range of photovoltaic materials (CdTe, Si, CIGS, GaAs).

Materials

Here we give an overview on the characteristics of some of the materials we investigate in our research.
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Meetings / Events

Here you  find an overview on meetings / events of this research group [more]

Techniques

Here you find links to the different techniques applied in our research group [more]

Research Projects

All research projects deal with the application and/or development of tools for electron microscopy to the understanding of microstructure formation mechanisms and microstructure-property relations
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