12,13 &14 Aug 2019: Seminar by Prof Marc De Graef of Carnegie Mellon University USA

Marc De Graef) obtained a Ph.D. in Physics. a Ph.D. in Physics.in the Catholic University of Leuven (Belgium). His graduate research centered on the microstructure and phase stability of Cu-Al and Cu-Al-Zn shape memory alloys. In 1989 he joined the Materials Department at the University of California at Santa Barbara as a post-doctoral researcher where he worked in various areas of materials science, using transmission electron microscopy and computer simulations as main research tools. In 1993 he joined the Department of Materials Science and Engineering at Carnegie Mellon University He has initiated research on the influence of hydrogen on titanium aluminides, magnetostrictive microstructures in Terfenol-D, grain boundary segregation in ZnO varistors, and a fundamental study of the use of energy-filtered TEM. His recent research interests are in the area of quantitative Lorentz microscopy, as applied to the study of magnetic thin films and magnetostrictive materials, and the three-dimensional microstructure of structural intermetallics. Prof. De Graef has authored or co-authored over 200 publications in the open literature and is an active member of TMS and MSA.He has won the Carnegie , Fellow of the Microscopy Society of America in 2009, and the TMS Educator award in 2012.

Prof Marc De Graef of Carnegie Mellon University USA will give the following lectures at the Department of Materials Engineering lecture theatre

1. Tutorial Lectures 1 and 2 Monday August 12, 11.30 am and 3.30 pm
“Defect imaging in TEM and SEM, including image formation theory, image simulations and some HAADF aspects”

2. Departmental Seminar:
Tuesday August 13, 3.30 pm

“Lorentz Transmission Electron Microscopy and Applications to Magnetic Materials”
The presentation will review the principles of the method of Lorentz transmission electron microscopy (LTEM), including instrumental requirements and imaging modes .Qualitative pictures of the magnetization configuration in a thin foil are discussed. Quantitative observation modes, which produce direct maps of the sample magnetization configuration are described, as well as the way Lorentz images can be simulated for a given magnetization configuration. Examples of applications of the technique are provided

3. Tutorial Lectures 3 and 4 Wednesday August 14, 11.30 am and 3.30 pm
“Diffraction theory for EBSD and consistent representations of orientations”