1. International Center of Electron Microscopy for Material Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow 30-059, Poland
2. Institute of Hydrodynamics of the Czech Academy of Sciences, Prague 16612, Czech Republic
3. Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow 30-059, Poland
4. School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, U.K.