von Pezold, J.; Lymperakis, L.; Neugebauer, J.: Atomistic study of the Hydrogen enhanced local plasticity (HELP) mechanism. ADIS 2010, Mechanical Properties, Ringberg, Germany (2010)
Himmerlich, M.; Lorenz, P.; Lymperakis, L.; Gutt, R.; Neugebauer, J.; Krischok, S.: GaN(0001) Surface States: A Comparison Between Photoelectron Spectroscopy and Density Functional Theory. International Workshop on Nitride Semiconductors, Tampa, Florida, USA (2010)
Lymperakis, L.; Neugebauer, J.: Ab initio Based Growth Simulations of III-Nitride Nanowires. International Workshop on Nitride Semiconductors, Tampa, Florida, USA (2010)
von Pezold, J.; Lymperakis, L.; Neugebauer, J.: Embrittlement in metals: An atomistic study of the Hydrogen enhanced local plasticity (HELP) mechanism. 139th Annual Meeting of the Minerals, Metals and Materials Society (TMS), Seattle, WA, USA (2010)
Lymperakis, L.; Neugebauer, J.: Ab-initio based growth simulations of III-Nitride nanowires. Computational Materials Science on Complex Energy Landscapes Workshop, Imst, Austria (2010)
Nikolov, S.; Petrov, M.; Lymperakis, L.; Friák, M.; Sachs, C.; Fabritius, H.; Neugebauer, J.; Raabe, D.: Extremal stiffness of crustacean cuticle through hierarchical optimization: Theory, modeling, and experiment. 3rd International Conference on Mechanics of Biomaterials & Tissues, multiscale modeling of tissue mechanical properties, Clearwater Beach, FL, USA (2009)
von Pezold, J.; Lymperakis, L.; Neugebauer, J.: Understanding embrittlement in metals: A multiscale study of the Hydrogen-enhanced local plasticity mechanism. Materials Research Society (MRS) Fall meeting, Boston, MA, USA (2009)
Lymperakis, L.; Neugebauer, J.: Adatom Kinetics, Thermodynamics, and Si Incorporation on Non-Polar III-Nitride Surfaces: Implications on Nanowire Growth. 8th nternational Conference on Nitride Semiconductors, Jeju Island, South Korea (2009)
International researcher team presents a novel microstructure design strategy for lean medium-manganese steels with optimized properties in the journal Science
The goal of this project is the investigation of interplay between the atomic-scale chemistry and the strain rate in affecting the deformation response of Zr-based BMGs. Of special interest are the shear transformation zone nucleation in the elastic regime and the shear band propagation in the plastic regime of BMGs.
In this project we developed a phase-field model capable of describing multi-component and multi-sublattice ordered phases, by directly incorporating the compound energy CALPHAD formalism based on chemical potentials. We investigated the complex compositional pathway for the formation of the η-phase in Al-Zn-Mg-Cu alloys during commercial…
Hydrogen embrittlement (HE) of steel is a great challenge in engineering applications. However, the HE mechanisms are not fully understood. Conventional studies of HE are mostly based on post mortem observations of the microstructure evolution and those results can be misleading due to intermediate H diffusion. Therefore, experiments with a…
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.