Dehm, G.: Atomic resolved imaging of grain boundary phase transitions in pure and alloyed metallic thin films. 17th International Conference on Intergranular and Interphase Boundaries in Materials (IIB 2024), Beijing, China (2024)
Lee, J. S.; Dehm, G.; Best, J. P.; Stein, F.: A Micromechanical Study on the Correlation of Composition and Properties of B2 FeAl across the Interface of an Fe–Al Diffusion Couple. ECR Day, Ruhr Universität Bochum, Bochum, Germany (2024)
Dehm, G.; Devulapalli, V.; Schulz, F.; Soares Barreto, E.; Ellendt, N.; Jägle, E. A.: Strengthening of CoCrFe(Mn)Ni high entropy alloys by dislocation pinning: From Lattice friction & SRO to particle strengthening. Possibilities and Limitations of Quantitative Materials Modeling and Characterization 2024, Bernkastel-kues, Germany (2024)
Vacirca, D.; Bignoli, F.; Li Bassi, A.; Best, J. P.; Dehm, G.; Faurie, D.; Djemia, P.; Ghidelli, M.: Boosting mechanical properties of thin film high entropy alloys through nanoengineering design strategies. 16th International Conference on Local Mechanical Properties, Prague, Czech Republic (2024)
Bhat, M. K.; Brink, T.; Ding, H.; Jung, C.; Best, J. P.; Dehm, G.: Influence of the Structure and Chemistry of Σ5 Grain Boundaries on Microscale Strengthening in Cu Bicrystals. TMS Annual Meeting and Exhibition 2024, Orlando, FL, USA (2024)
Kanjilal, A.; Best, J. P.; Dehm, G.: Elevated temperature deformation of intermetallic phases in Mg–Al–Ca alloy at small length scale. International conference on creep and fracture of engineering materials and structures, Creep 2024, Bangalore, India (2024)
Kini, M. K.; Nandy, S.; Best, J. P.; Dehm, G.: Deformation of CoCrFeNi alloy thin films under thermal fatigue. International Conference on Creep and Fracture of Engineering Materials and Structures CREEP 2024, Bangalore, India (2024)
Kanjilal, A.; Best, J. P.; Dehm, G.: Using in-situ nano- and micromechanical testing to probe the fracture behavior of intermetallic Laves phase materials. 7th International Indentation Workshop – IIW7, Hyderabad, India (2023)
Dehm, G.: Resolving the interplay of structure and energy landscapes of tilt grain boundaries in metals. 3rd ELSICS Conference and Bunsen-Colloquium “Energy Landscapes and Structure in Ion Conducting Solids (ELSICS)”, Ulm, Germany (2023)
Dehm, G.; Liebscher, C.: In situ TEM study of deformation and phase transformation mechanisms in chemically complex alloys. Symposium In-situ & Environmental Microscopy, 20th International Microscopy Congress, Busan, Korea (2023)
Kanjilal, A.; Rehman, U.; Best, J. P.; Dehm, G.: Role of temperature on micromechanical fracture behaviour of Laves phase in Mg–Al–Ca ternary alloy. FEMS EUROMAT 2023, Frankfurt, Germany (2023)
International researcher team presents a novel microstructure design strategy for lean medium-manganese steels with optimized properties in the journal Science
The aim of the work is to develop instrumentation, methodology and protocols to extract the dynamic strength and hardness of micro-/nano- scale materials at high strain rates using an in situ nanomechanical tester capable of indentation up to constant strain rates of up to 100000 s−1.
In this project, we investigate a high angle grain boundary in elemental copper on the atomic scale which shows an alternating pattern of two different grain boundary phases. This work provides unprecedented views into the intrinsic mechanisms of GB phase transitions in simple elemental metals and opens entirely novel possibilities to kinetically engineer interfacial properties.
Within this project, we will use an infra-red laser beam source based selective powder melting to fabricate copper alloy (CuCrZr) architectures. The focus will be on identifying the process parameter-microstructure-mechanical property relationships in 3-dimensional CuCrZr alloy lattice architectures, under both quasi-static and dynamic loading…
Copper is widely used in micro- and nanoelectronics devices as interconnects and conductive layers due to good electric and mechanical properties. But especially the mechanical properties degrade significantly at elevated temperatures during operating conditions due to segregation of contamination elements to the grain boundaries where they cause…