Hieke, S. W.; Dehm, G.; Scheu, C.: Solid state dewetting of epitaxial Al thin films on sapphire studied by electron microscopy. Materials Research Society Fall Meeting & Exhibition 2016 (MRS Fall 2016), Boston, MA, USA (2016)
Luo, W.; Kirchlechner, C.; Dehm, G.; Stein, F.: A New Method to Study the Composition Dependence of Mechanical Properties of Laves. MRS Fall Meeting 2016, Boston, MA, USA (2016)
Dehm, G.: Mikromechanik: lokale Einblicke in die mechanischen Eigenschaften von Materialien. Eröffnung des Christian Doppler Labors für
Lebensdauer und Zuverlässigkeit von Grenzflächen in komplexen Mehrlagenstrukturen der Elektronik „RELAB“, Vienna, Austria (2015)
Dehm, G.: New insights into the mechanical behavior of interface controlled metals. Colloquium Materials Modelling, Institut für Materialprüfung, Werkstoffkunde und Festigkeitslehre (IMWF), Universität Stuttgart , Stuttgart, Germany (2015)
Dehm, G.; Imrich, P. J.; Malyar, N.; Kirchlechner, C.: Differences in deformation behavior of bicrystalline Cu micropillars containing different grain boundaries. MS&T 2015 (Materials Science and Technology) meeting, symposium entitled "Deformation and Transitions at Grain Boundaries", Columbus, OH, USA (2015)
Dehm, G.; Zhang, Z.; Völker, B.: Structure and strength of metal-ceramic interfaces: New insights by Cs corrected TEM and advances in miniaturized mechanical testing. MS&T 2015 (Materials Science and Technology) meeting, Symposium entitled "Structures and Properties of Grain Boundaries: Towards an atomic-scale understanding of ceramics", Columbus, OH, USA (2015)
Dehm, G.; Harzer, T. P.; Völker, B.; Imrich, P. J.; Zhang, Z.: Towards New Insights on Interface Controlled Materials by Advanced Electron Microscopy. Frontiers of Electron Microscopy in Materials Science Meeting (FEMMS 2015), Lake Tahoe, CA, USA (2015)
Dehm, G.; Jaya, B. N.; Raghavan, R.; Kirchlechner, C.: Probing deformation and fracture of materials with high spatial resolution. Euromat 2015 - Symposium on In-situ Micro- and Nano-mechanical, Characterization and Size Effects
, Warsaw, Poland (2015)
Dehm, G.: In situ nano- and micromechanics of materials. International Workshop on Advanced and In-situ Microscopies of Functional Nanomaterials and Devices – IAMNano 2015, Hamburg, Germany (2015)
Duarte, M. J.; Brinckmann, S.; Renner, F. U.; Dehm, G.: Nanomechanical testing under environmental conditins of Fe-based metallic glasses. 22st International Symposium on Metastable Amorphous and Nanostructured Materials, ISMANAM 2015, Paris, France (2015)
Hieke, S. W.; Dehm, G.; Scheu, C.: Temperature induced faceted hole formation in epitaxial Al thin films on sapphire. Understanding Grain Boundary Migration: Theory Meets Experiment, Günzburg/Donau, Germany (2015)
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…
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…
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.
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.
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
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.
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.
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…