Jaya, B. N.; Köhler, M.; Schnabel, V.; Raabe, D.; Schneider, J. M.; Kirchlechner, C.; Dehm, G.: Micro-scale fracture behavior of Co based metallic glass thin films. 2016 TMS Annual Meeting and Exhibition Symposium: In Operando Nano- and Micro-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques, Nashville, TN, USA (2016)
Hieke, S. W.; Dehm, G.; Scheu, C.: Investigation of solid state dewetting phenomena of epitaxial Al thin films on sapphire using electron microscopy. The 16th European Microscopy Congress (EMC 2016), Lyon, France (2016)
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)
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…
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.
Interstitial alloying in high-entropy alloys (HEAs) is an important strategy for tuning and improving their mechanical properties. Strength can be increased due to interstitial solid-solution hardening, while interstitial alloying can simultaneously affect, e.g., stacking fault energies (SFEs) and thus trigger different deformation mechanisms…
To advance the understanding of how degradation proceeds, we use the latest developments in cryo-atom probe tomography, supported by transmission-electron microscopy. The results showcase how advances in microscopy & microanalysis help bring novel insights into the ever-evolving microstructures of active materials to support the design of better…
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.
The Magnetic Moment Tensor Potentials (mMTPs) are a class of machine-learning interatomic potentials, which could accurately reproduce both vibrational and magnetic degrees of freedom as provided, e.g., from first-principles calculations [1]. Application to prototypical bcc iron has demonstrated that these potentials are capable to quantitatively…
The worldwide developments of electric vehicles, as well as large-scale or grid-scale energy storage to compensate the intermittent nature of renewable energy generation has generated a surge of interest in battery technology. Understanding the factors controlling battery capacity and, critically, their degradation mechanisms to ensure long-term…
In this project, we aim at significantly enhancing the strength-ductility combination of quinary high-entropy alloys (HEAs) with five principal elements by simultaneously introducing interstitial C/N and the transformation induced plasticity (TRIP) effect. Thus, a new class of alloys, namely, interstitially alloyed TRIP-assisted quinary (five-component) HEAs is being developed.