Demir, E.; Raabe, D.; Zaafarani, N.; Zaefferer, S.: Investigation of the indentation size effect through the measurement of the geometrically necessary dislocations beneath small indents of different depths using EBSD tomography. Acta Materialia 57, pp. 559 - 569 (2009)
Zaafarani, N.; Raabe, D.; Singh, R. N.; Roters, F.; Zaefferer, S.: Three dimensional investigation of the texture and microstructure below a nanoindent in a Cu single crystal using 3D EBSD and crystal plasticity finite element simulations. Acta Materialia 54 (7), pp. 1707 - 1994 (2006)
Zaafarani, N.; Roters, F.; Raabe, D.: Recent Progress in the 3D Experimentation and Simulation of Nanoindents. Proceedings of Fundamentals of deformation and Annealing, Manchester, UK, September 05, 2006 - September 07, 2006. Materials Science Forum 550, pp. 199 - 204 (2007)
Zaafarani, N.; Roters, F.; Raabe, D.: A Study of Deformation and texture Evolution during Nanoindentation in a Cu Single Crystal using Phenomenological and Physically-Based Crystal Plasticity FE Models. In: Proceedings of MMM Third International Conference Multiscale Materials Modeling, pp. 585 - 588. MMM Third International Conference Multiscale Materials Modeling, Freiburg, Germany, September 18, 2006 - September 22, 2006. Fraunhofer IRB Verlag, Germany (2006)
Zaafarani, N.; Roters, F.; Zaefferer, S.; Raabe, D.: Tomographic 3D EBSD Analysis of Deformation and Rotation Patterns around Nanoindents. 15th International Conference on the Texture of Materials (ICOTOM 15), Pittsburgh, PA, USA (2008)
Frommert, M.; Zaafarani, N.; Zaefferer, S.: Application of 3-dimensional orientation microscopy to study the microstructure of different heavily deformed metals. DGM-DVM Arbeitskreistreffen "Mikrostrukturuntersuchungen im REM", Ilmenau, Germany (2008)
Raabe, D.; Roters, F.; Ma, D.; Zaefferer, S.; Friák, M.; Zaafarani, N.: Orientation patterning below indents and Bottom-up mechanical design by using quantum mechanics. Symposium Multiscale Plasticity of Crystalline Materials of the International Union of Theoretical and Applied Mechanics (IUTAM), TU Eindhoven, The Netherlands (2007)
Raabe, D.; Zaafarani, N.; Roters, F.; Zaefferer, S.: 3D studies on orientation patterning below nanoindents in Cu single crystals using 3D EBSD and crystal plasticity finite element simulations. 3rd Intern. Indentation Workshop, Cavendish Lab., Cambridge, UK (2007)
Bastos, A.; Zaafarani, N.; Zaefferer, S.; Raabe, D.: Overview on 3D EBSD. Deutsche Gesellschaft für Materialkunde e.V., Fachausschuss Texturen, RWTH Aachen, Germany (2007)
Raabe, D.; Zaafarani, N.; Roters, F.: 3D Study on Texture and Size Effects Below Nanoindents in Cu Single Crystals Using 3D FIB-EBSD and Crystal Plasticity Finite Element Simulations. MRS Fall Conference, Boston, MA, USA (2006)
Zaafarani, N.; Roters, F.; Raabe, D.: A Study of Deformation and texture Evolution during Nanoindentation in a Cu Single Crystal using Phenomenological and Physically-Based Crystal Plasticity FE Models. MMM Third International Conference Multiscale Materials Modeling, Freiburg, Germany (2006)
Zaafarani, N.; Roters, F.; Raabe, D.: Recent Progress in the 3D Experimentation and Simulation of Nanoindents. Symposium Fundamentals of Deformation and Annealing, Manchester, UK (2006)
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…
Hydrogen induced embrittlement of metals is one of the long standing unresolved problems in Materials Science. A hierarchical multiscale approach is used to investigate the underlying atomistic mechanisms.
For understanding the underlying hydrogen embrittlement mechanism in transformation-induced plasticity steels, the process of damage evolution in a model austenite/martensite dual-phase microstructure following hydrogenation was investigated through multi-scale electron channelling contrast imaging and in situ optical microscopy.
We will investigate the electrothermomechanical response of individual metallic nanowires as a function of microstructural interfaces from the growth processes. This will be accomplished using in situ SEM 4-point probe-based electrical resistivity measurements and 2-point probe-based impedance measurements, as a function of mechanical strain and…
The project aims to study corrosion, a detrimental process with an enormous impact on global economy, by combining denstiy-functional theory calculations with thermodynamic concepts.
Hydrogen embrittlement affects high-strength ferrite/martensite dual-phase (DP) steels. The associated micromechanisms which lead to failure have not been fully clarified yet. Here we present a quantitative micromechanical analysis of the microstructural damage phenomena in a model DP steel in the presence of hydrogen.
This project will aim at developing MEMS based nanoforce sensors with capacitive sensing capabilities. The nanoforce sensors will be further incorporated with in situ SEM and TEM small scale testing systems, for allowing simultaneous visualization of the deformation process during mechanical tests
Understanding hydrogen-assisted embrittlement of advanced structural materials is essential for enabling future hydrogen-based energy industries. A crucially important phenomenon in this context is the delayed fracture in high-strength structural materials. Factors affecting the hydrogen embrittlement are the hydrogen content,...
Thermo-chemo-mechanical interactions due to thermally activated and/or mechanically induced processes govern the constitutive behaviour of metallic alloys during production and in service. Understanding these mechanisms and their influence on the material behaviour is of very high relevance for designing new alloys and corresponding…