Strondl, A.; Palm, M.; Gnauk, J.; Frommeyer, G.: Microstructure and mechanical properties of nickel based superalloy IN718 produced by rapid prototyping with electron beam melting (EBM). Materials Science and Technology 27 (5), pp. 876 - 883 (2011)
Jiménez, J.A.; Frommeyer, G.: Analysis of the microstructure evoluting during tensile testing at room temperature of high-manganese austenitic stee. Materials Characterization 61 (21), pp. 221 - 226 (2010)
Pozuelo, M.; Wittig, J.A.; Jiménez, J.A.; Frommeyer, G.: Enhanced Mechanical Properties of a Novel High-Nitrogen Cr–Mn–Ni–Si Austenitic Stainless Steel via TWIP/TRIP Effects. Metallurgical and Materials Transactions A 40 (8), pp. 1826 - 1834 (2009)
Jiménez, J.A.; Carsi, M.; Ruano, O.A.; Frommeyer, G.: Effect of testing temperature and strain rate on the transformation behaviour of retained austenite in low-alloyed multiphase steel. Materials Science and Engineering A 508, pp. 195 - 199 (2009)
Frommeyer, G.; Rablbauer, R.: High temperature materials based on the intermetallic compound NiAl reinforced by refractory metals for advanced energy conversion technologies. Steel Research International 79, pp. 507 - 513 (2008)
Strondl, A.; Fischer, R.; Frommeyer, G.; Schneider, A.: Investigations of MX and γ'/γ'' precipitates in the nickel-based superalloy 718 produced by electron beam melting. Materials Science and Engineering A 480, pp. 138 - 147 (2008)
Wittig, J.E.; Frommeyer, G.: Deformation and fracture behavior of rapidly solidified and annealed iron-silicon alloys. Metallurgical and Materials Transaction A 39A, pp. 252 - 264 (2008)
Deges, J.; Rablbauer, R.; Frommeyer, G.; Schneider, A.: Observation of boron enrichments in a heat treated quasibinary hypoeutectic NiAl-HfB2 alloy by means of atom probe field-ion microscopy (APFIM). Surface and Interface Analysis 39, pp. 251 - 156 (2007)
Frommeyer, G.: Die Singularitäten des Eisens bestimmen die universellen Eigenschaften der Stähle. Teil 1: Bildung-Struktur-Magnetismus-Transformation des Eisens. Stahl und Eisen 127 (10), pp. 53 - 64 (2007)
Frommeyer, G.: Die Singularitäten des Eisens bestimmen die universellen Eigenschaften der Stähle. Teil 2: Plastizität, Verfestigungsmechanismen und Mischkristallhärtung des krz Eisens. Stahl und Eisen 127 (11), pp. 97 - 110 (2007)
Frommeyer, G.: Die Singularitäten des Eisens bestimmen die universellen Eigenschaften der Stähle. Teil 3: Stahl-Innovationen. Stahl und Eisen 127 (12), pp. 67 - 82 (2007)
Frommeyer, G.; Kowalski, W.; Rablbauer, R.: Structural superplasticity in a fine-grained eutectic intermetallic NiAl-Cr alloy. Metallurgical and Materials Transactions A 37A, pp. 3511 - 3517 (2007)
Jimenez, J.A.; Frommeyer, G.; Lopez, M.; Candela, N.; Ruano, O.A.: Mechanical properties of composite materials consisting of M3/2 high speed steel reinforced with niobium carbides. Materials Science Forum 539-543, pp. 756 - 761 (2007)
Frommeyer, G.; Brüx, U.: Microstructures and Mechanical Properties of High-Strength Fe–Mn–Al–C Light-Weight TRIPLEX Steels. Steel Research International 77 (9-10), pp. 627 - 633 (2006)
Frommeyer, G.; Gnauk, J.; Frech, W.; Zeller, S.: Shape flow casting and in-rotating-liquid-spinning processes for the continuous production of wires and of high-strength and soft magnetic metallic fibres. ISIJ International 46 (12), pp. 1858 - 1868 (2006)
The wide tunability of the fundamental electronic bandgap by size control is a key attribute of semiconductor nanocrystals, enabling applications spanning from biomedical imaging to optoelectronic devices. At finite temperature, exciton-phonon interactions are shown to exhibit a strong impact on this fundamental property.
Oxides find broad applications as catalysts or in electronic components, however are generally brittle materials where dislocations are difficult to activate in the covalent rigid lattice. Here, the link between plasticity and fracture is critical for wide-scale application of functional oxide materials.
In this project we study - together with the department of Prof. Neugebauer and Dr. Sandlöbes at RWTH Aachen - the underlying mechanisms that are responsible for the improved room-temperature ductility in Mg–Y alloys compared to pure Mg.
Efficient harvesting of sunlight and (photo-)electrochemical conversion into solar fuels is an emerging energy technology with enormous promise. Such emerging technologies depend critically on materials systems, in which the integration of dissimilar components and the internal interfaces that arise between them determine the functionality.
Enabling a ‘hydrogen economy’ requires developing fuel cells satisfying economic constraints, reasonable operating costs and long-term stability. The fuel cell is an electrochemical device that converts chemical energy into electricity by recombining water from H2 and O2, allowing to generate environmentally-friendly power for e.g. cars or houses…
The project Hydrogen Embrittlement Protection Coating (HEPCO) addresses the critical aspects of hydrogen permeation and embrittlement by developing novel strategies for coating and characterizing hydrogen permeation barrier layers for valves and pumps used for hydrogen storage and transport applications.
In this project, we work on a generic solution to design advanced high-entropy alloys (HEAs) with enhanced magnetic properties. By overturning the concept of stabilizing solid solutions in HEAs, we propose to render the massive solid solutions metastable and trigger spinodal decomposition. The motivation for starting from the HEA for this approach…