Uijttewaal, M.; Hickel, T.; Neugebauer, J.: Phase transformations of Ni2MnGa shape memory alloy from first principles: The (pre-)martensitic transition by phonons and magnons, Soft mode phase transformation by phonon couplings. Computational Materials Science Workshop, Ebernburg Castle, Germany (2008)
Grabowski, B.; Ismer, L.; Hickel, T.; Neugebauer, J.: Ab initio up to the melting point: An efficient thermodynamic integration scheme. Computational Materials Science Workshop, Ebernburg Castle, Germany (2008)
Hickel, T.; Uijttewaal, M.; Grabowski, B.; Neugebauer, J.: First principles determination of phase transitions in magnetic shape memory alloys. XXI Congress of the International Union of Crystallography, Osaka, Japan (2008)
Grabowski, B.; Ismer, L.; Hickel, T.; Neugebauer, J.: Ab initio up to the melting point: Influence of vacancies and explicit anharmonicity. International Workshop on Ab initio Description of Iron and Steel (ADIS2008), Ringberg Castle, Germany (2008)
Ismer, L.; Friák, M.; Hickel, T.; Neugebauer, J.: Effect of interstitial carbon on the magnetic structure of fcc iron: Towards an ab-initio simulation of austenitic steels. International Workshop on Ab initio Description of Iron and Steel (ADIS2008), Ringberg Castle, Germany (2008)
Körmann, F.; Dick, A.; Grabowski, B.; Hickel, T.; Neugebauer, J.: The free energy of bcc iron: Integrated ab initio derivation of vibrational, electronic, and magnetic contributions. International Workshop on Ab initio Description of Iron and Steel (ADIS2008), Ringberg Castle, Germany (2008)
Uijttewaal, M.; Hickel, T.; Neugebauer, J.: Phase transformations of Ni2MnGa shape memory alloy from first principles: The martensitic transition & magnetism, The pre-martensitic transition & soft modes, Off-stoichiometry & the stability of the phases. Workshop on magnetic shape memory alloys, Bremen, Germany (2008)
Hickel, T.: Ab initio determination of free energies and phase diagrams. MPIE Inter-Departmental Tutorial Day(s) 2008, MPIE, Duesseldorf, Germany (2008)
Marquardt, O.; Hickel, T.; Neugebauer, J.: Optical properties of semiconductor nanostructures including strain and piezoelectric effects. PARSEM meeting and workshop, Cambridge, UK (2008)
Hickel, T.; Uijttewaal, M.; Neugebauer, J.: Ab initio Investigations of Temperature Dependent Effects in MSM Alloys. Antragskolloquium SPP1239, Dresden, Germany (2008)
Grabowski, B.; Ismer, L.; Hickel, T.; Neugebauer, J.: Ab initio up to the melting point: Influence of vacancies and explicit anharmonicity. Spring meeting of the German Physical Society (DPG), Berlin, Germany (2008)
Marquardt, O.; Hickel, T.; Neugebauer, J.: Plane-wave implementation of the k.p-formalism including strain and piezoelectricity to study the optical properties of semiconductor nanostructures. Spring meeting of the German Physical Society (DPG), Berlin, Germany (2008)
Uijttewaal, M.; Hickel, T.; Neugebauer, J.: Phase transformations of Ni2MnGa shape memory alloy from first principles. Spring meeting of the German Physical Society (DPG), Berlin, Germany (2008)
Hickel, T.; Uijttewaal, M.; Grabowski, B.; Neugebauer, J.: First principles Determination of Phase Transitions in Magnetic Shape Memory Alloys. Group Seminar in Materials Department, University of California (UCSB), Santa Barbara, CA, USA (2008)
Marquardt, O.; Hickel, T.; Neugebauer, J.: Optical properties of semiconductor nanostructures, a PW-approach to real-space properties. MRL seminar at UCSB, UCSB, Santa Barbara, USA (2008)
Grabowski, B.; Hickel, T.; Neugebauer, J.: From ab initio to materials properties: Accuracy and error bars of DFT thermodynamics. Phonon Workshop, Krakau, Poland (2007)
Hickel, T.; Uijttewaal, M.; Grabowski, B.; Neugebauer, J.: Determination of symmetry reduced structures by a soft-phonon analysis in magnetic shape memory alloys. 2nd Workshop on ab initio phonon calculations, Cracow, Poland (2007)
Hydrogen in aluminium can cause embrittlement and critical failure. However, the behaviour of hydrogen in aluminium was not yet understood. Scientists at the Max-Planck-Institut für Eisenforschung were able to locate hydrogen inside aluminium’s microstructure and designed strategies to trap the hydrogen atoms inside the microstructure. This can…
This project will aim at developing MEMS based nanoforce sensors with capacitive sensing capabilities. The nanoforce sensors will be further incorporated with in situ SEM and TEM small scale testing systems, for allowing simultaneous visualization of the deformation process during mechanical tests
The project aims to study corrosion, a detrimental process with an enormous impact on global economy, by combining denstiy-functional theory calculations with thermodynamic concepts.
Hydrogen embrittlement affects high-strength ferrite/martensite dual-phase (DP) steels. The associated micromechanisms which lead to failure have not been fully clarified yet. Here we present a quantitative micromechanical analysis of the microstructural damage phenomena in a model DP steel in the presence of hydrogen.
Nickel-based alloys are a particularly interesting class of materials due to their specific properties such as high-temperature strength, low-temperature ductility and toughness, oxidation resistance, hot-corrosion resistance, and weldability, becoming potential candidates for high-performance components that require corrosion resistance and good…
Understanding hydrogen-assisted embrittlement of advanced structural materials is essential for enabling future hydrogen-based energy industries. A crucially important phenomenon in this context is the delayed fracture in high-strength structural materials. Factors affecting the hydrogen embrittlement are the hydrogen content,...
Thermo-chemo-mechanical interactions due to thermally activated and/or mechanically induced processes govern the constitutive behaviour of metallic alloys during production and in service. Understanding these mechanisms and their influence on the material behaviour is of very high relevance for designing new alloys and corresponding…
Within this project, we will investigate the micromechanical properties of STO materials with low and higher content of dislocations at a wide range of strain rates (0.001/s-1000/s). Oxide ceramics have increasing importance as superconductors and their dislocation-based electrical functionalities that will affect these electrical properties. Hence…