3D structures in crystalline materials can be made visible using scanning transmission stereo electron microscopy (STEM-Stereo). A major challenge is the quantification of the thickness of the respective TEM samples. Also, the densities, directions and lengths of dislocations in the sample can only be approximated manually which requires a large amount of work. The aim of this project is to develop a software tool that facilitates the reconstruction, visualization and quantification of dislocation structures in TEM samples on the basis of stereo image pairs. The tool should significantly reduce the amount of work as well as improve the accuracy of the reconstructions and density estimations compared to previous methods.

Publications

2018
Three-dimensional reconstruction and quantification of dislocation substructures from transmission electron microscopy stereo pairs Ultramicroscopy, Vol.195, pp. 157-170, 2018 (preprint available as ZIB-Report 18-50) Leonardo Agudo Jácome, Hans-Christian Hege, Olaf Paetsch, Kai Pöthkow PDF (ZIB-Report)
BibTeX
DOI
Quantification and Visualization of Dislocation Structures Based on Stereographic STEM Images
2016
3D Reconstruction, Visualization and Quantification of Dislocations from Transmission Electron Microscopy Stereo-Pairs Microscopy and Microanalysis 2016, July 24-28 Columbus, Ohio, 2016 Leonardo Agudo Jácome, Hans-Christian Hege, Olaf Paetsch, Kai Pöthkow BibTeX
Quantification and Visualization of Dislocation Structures Based on Stereographic STEM Images
2015
Three-Dimensional Characterization of Superdislocation Interactions in the High Temperature and Low Stress Creep Regime of Ni-Base Superalloy Single Crystals Proceedings of CREEP 2015 – 13th International Conference on Creep and Fracture of Engineering Materials and Structures, May 31 – June 4, 2015, Toulouse, France, pp. 16-17, 2015 Leonardo Agudo Jácome, Gunter Eggeler, Kai Pöthkow, Olaf Paetsch, Hans-Christian Hege BibTeX
Quantification and Visualization of Dislocation Structures Based on Stereographic STEM Images