Marx, V. M.; Kirchlechner, C.; Cordill, M. J.; Dehm, G.: The mechanical behavior of thin cobalt films on polyimide. Arbeitskreistreffen Rasterkraftmikroskopie und nanomechanische Methoden, TU Darmstadt, Darmstadt, Germny (2015)
Dehm, G.: Structure and Nano-/Micromechanics of Materials. Chemisch-Physikalisch-Technische Sektion der Max-Planck-Gesellschaft, Berlin, Germany (2015)
Dehm, G.: New Insights into Materials Phenomena by Advanced TEM. Symposium: Advanced Materials Analysis by latest STEM Technologies, Mülheim an der Ruhr, Germany (2015)
Brinckmann, S.; Fink, C.; Dehm, G.: Roughness and Microstructure Development during Nanotribology in Austenite. DPG-Spring Meeting, Berlin, Germany (2015)
Dehm, G.: Probing deformation mechanisms of Cu structures relevant for electronic applications. Electronic Materials and Applications, Orlando, FL, USA (2015)
Dehm, G.: Phase stability in nanostructured metallic materials with exceptional strength. 2015 MRS Fall Meeting, Symposium VV: In situ study of synthesis and transformation of materials, Boston, MA, USA (2015)
Harzer, T. P.; Djaziri, S.; Raghavan, R.; Dehm, G.: Nanostructure and mechanical behavior of metastable Cu–Cr thin films grown by molecular beam epitaxy. 61. Metallkunde-Kolloquium - Werkstoffforschung für Wirtschaft und Gesellschaft, Lech am Arlberg, Austria (2015)
Jaya, B. N.; Kirchlechner, C.; Dehm, G.: Probing deformation and fracture of materials with high spatial resolution. EDSA 2015 – International Workshop on Stress Assisted Environmental Damage in Structural Materials, Chennai, India (2015)
Jaya, B. N.; Kirchlechner, C.; Dehm, G.: Are micro-fracture tests reliable? 2015 MRS Fall Meeting and Exhibit - Symposium T: Strength and Failure at the Micro and Nano-scale-From fundamentals to Applications
, Boston, MA, USA (2015)
Dehm, G.: Differences in deformation behavior of Cu structures containing individual grain boundaries. Symposium RR: Scaling Effects in Plasticity - Synergy between Simulations and Experiments, Fall MRS, Boston, MA, USA (2014)
Hodnik, N.; Baldizzone, C.; Jeyabharathi, C.; Dehm, G.; Mayrhofer, K. J. J.: Bridging the gap between electrochemistry and microscopy: electrochemical IL-TEM and in-situ electrochemical TEM study. 2nd Conference on in In-situ and Correlative Electron Microscopy, Saarbrücken, Germany (2014)
Marx, V. M.; Cordill, M. J.; Kirchlechner, C.; Dehm, G.: In-situ stress measurements in thin films using synchrotron diffraction. Summer School: Theory and Practice of Modern Powder Diffraction, Tagungshaus Schönenberg, Ellwangen, Ellwangen, Germany (2014)
Jaya, B. N.; Kirchlechner, C.; Dehm, G.: Design and development of fracture property measurement techniques at the small scale. ICAMS (RUB), Bochum, Germany (2014)
Scandium-containing aluminium alloys are currently attracting interest as candidates for high-performance aerospace structural materials due to their outstanding combination of strength, ductility and corrosion resistance. Strengthening is achieved by precipitation of Al3Sc-particles upon ageing heat treatment.
In this project, we aim to synthetize novel ZrCu thin film metallic glasses (TFMGs) with controlled composition and nanostructure, investigating the relationship with the mechanical behavior and focusing on the nanometre scale deformation mechanisms. Moreover, we aim to study the mechanical properties of films with complex architectures such as…
Wear-related energy loss and component damage, including friction and remanufacturing of components that failed by surface contacts, has an incredible cost. While high-strength materials generally have low wear rates, homogeneous deformation behaviour and the accommodation of plastic strain without cracking or localised brittle fracture are also…
Multiple Exciton Generation (MEG) is a promising pathway towards surpassing the Shockley-Queisser limit in solar energy conversion efficiency, where an incoming photon creates a high energy exciton, which then decays into multiple excitons.
In this project, we aim to design novel NiCoCr-based medium entropy alloys (MEAs) and further enhance their mechanical properties by tuning the multiscale heterogeneous composite structures. This is being achieved by alloying of varying elements in the NiCoCr matrix and appropriate thermal-mechanical processing.
The exploration of high dimensional composition alloy spaces, where five or more alloying elements are added at near equal concentration, triggered the development of so-called high entropy (HEAs) or compositionally complex alloys (CCAs). This new design approach opened vast phase and composition spaces for the design of new materials with advanced…
This project studies the mechanical properties and microstructural evolution of a transformation-induced plasticity (TRIP)-assisted interstitial high-entropy alloy (iHEA) with a nominal composition of Fe49.5Mn30Co10Cr10C0.5 (at. %) at cryogenic temperature (77 K). We aim to understand the hardening behavior of the iHEA at 77 K, and hence guide the future design of advanced HEA for cryogenic applications.