Demir, E.; Raabe, D.; Roters, F.: The mechanical size effect as a mean-field breakdown phenomenon: Example of microscale single crystal beam bending. Acta Materialia 58, pp. 1876 - 1886 (2010)
Demir, E.; Roters, F.; Raabe, D.: Bending of single crystal microcantilever beams of cube orientation: Finite element model and experiments. Journal of the Mechanics and Physics of Solids 58, pp. 1599 - 1612 (2010)
Dmitrieva, O.; Svirina, J. V.; Demir, E.; Raabe, D.: Investigation of the internal substructure of microbands in a deformed copper single crystal: Experiments and dislocation dynamics simulation. Modelling Modelling and Simulation in Materials Science and Engineering 18 (085011), pp. 085011-1 - 085011-14 (2010)
Demir, E.: A Taylor-based plasticity model for orthogonal machining of single-crystal FCC materials including frictional effects. International Journal of Advanced Manufacturing Technology 40 (9-10), pp. 847 - 856 (2009)
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)
Demir, E.: Taylor-based model for micro-machining of single crystal fcc materials including frictional effects—Application to micro-milling process. International Journal of Machine Tools and Manufacture 48 (14), pp. 1592 - 1598 (2008)
Roters, F.; Demir, E.; Eisenlohr, P.: On the calculation of the geometrically necessary dislocation density in crystal plasticity FEM models. 1st International Conference on Material Modelling (ICMM 1), Dortmund, Germany (2009)
Calcagnotto, M.; Ponge, D.; Demir, E.; Raabe, D.; Zaefferer, S.: 3D-EBSD Investigation on Orientation Gradients and Geometrically Necessary Dislocations Induced by the Martensitic Phase Transformation in Ultrafine Grained Dual-Phase Steels. Interdisciplinary Symposium on 3D Microscopy, Interlaken, Switzerland (2009)
Raabe, D.; Demir, E.; Zaefferer, S.: Experimental investigation of geometrically necessary dislocations beneath small indents of different depths using EBSD tomography. MRS 2009 Fall Meeting, Boston, MA, USA (2009)
Demir, E.; Raabe, D.; Zaefferer, S.: Quantification of Geometrically Necessary Dislocations Beneath Small Indents of Different Depths Using EBSD Tomography. MRS Fall Conference 2008, Boston, MA, USA (2008)
Konijnenberg, P. J.; Demir, E.; Zaefferer, S.: Application of 3D EBSD-based orientation microscopy to the observation of damage in TRIP steels. Advanced methods in EBSD 2010, Saint Etienne, France (2010)
Raabe, D.; Demir, E.; Roters, F.: Bending of Single Crystal Copper Micro Cantilever Beams with Cube Orientation: Finite Element Simulation and Experiments. MRS Fall Meeting 2009, Boston, MA, USA (2009)
Raabe, D.; Demir, E.; Roters, F.: Size Dependence of Mechanical Strength Observed During Bending of Beams with Rectangular and Circular Cross Sections. MRS Fall Meeting 2009 , Boston, MA, USA (2009)
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…
Oxidation and corrosion of noble metals is a fundamental problem of crucial importance in the advancement of the long-term renewable energy concept strategy. In our group we use state-of-the-art electrochemical scanning flow cell (SFC) coupled with inductively coupled plasma mass spectrometer (ICP-MS) setup to address the problem.
In this project we investigate the hydrogen distribution and desorption behavior in an electrochemically hydrogen-charged binary Ni-Nb model alloy. The aim is to study the role of the delta phase in hydrogen embrittlement of the Ni-base alloy 718.
We plan to investigate the rate-dependent tensile properties of 2D materials such as metal thin films and PbMoO4 (PMO) films by using a combination of a novel plan-view FIB based sample lift out method and a MEMS based in situ tensile testing platform inside a TEM.
This project aims to investigate the influence of grain boundaries on mechanical behavior at ultra-high strain rates and low temperatures. For this micropillar compressions on copper bi-crystals containing different grain boundaries will be performed.
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.