Posner, R.; Fink, N.; Wolpers, M.; Grundmeier, G.: Electrochemical electrolyte spreading studies of the protective properties of ultra-thin films on zinc galvanized steel. Surface and Coatings Technology 228, pp. 286 - 295 (2013)
Stellnberger, K.-H.; Wolpers, M.; Fili, T.; Reinartz, C.; Paul, T.; Stratmann, M.: Electrochemical quartz crystal microbalance in modern corrosion research Study of the pretreatment of galvanized steel. Faraday Discussions 107, pp. 307 - 322 (1997)
Wolpers, M.; Stratmann, M.; Viefhaus, H.; Streckel, H.: The structure and stability of metal surfaces modified by silane Langmuir-Blodgett films. Thin Solid Films 210-211 (Part 2), pp. 592 - 596 (1992)
Stratmann, M.; Wolpers, M.; Lösch, R.; Volmer, M.: The structure and reactivity of chemically modified reactive metal surfaces. Bulletin of Electrochemistry 8, p. 8 - 8 (1992)
Wolpers, M.; Stratmann, M.; Viefhaus, H.: Structure and stability of silane modified metal surfaces. Fresenius' Journal of Analytical Chemistry 341 (5-6), pp. 337 - 338 (1991)
Stratmann, M.; Wolpers, M.; Streckel, H.; Feser, R.: Use of a Scanning-Kelvinprobe in the Investigation of Electrochemical Reactions at the Metal/Polymer Interface. Berichte Bunsengesellschaft Physikalische Chemie 95, 11, pp. 1365 - 1375 (1991)
Wolpers, M.; Viefhaus, H.; Stratmann, M.: Surface Analytical Investigation on Metal Surfaces, Modified by LB Films of Silanes. Applied Surface Science 47, 1, pp. 49 - 62 (1991)
Wolpers, M.; Viefhaus, H.; Stratmann, M.: SEM and SAM Imaging of Silane LB-Films on Metallic Substrates. Applied Surface Science 45, 2, pp. 167 - 170 (1990)
Stratmann, M.; Vogel, D.; Rohwerder, M.; Steinbeck, G.; Ogle, K.; Wolpers, M.; de Boeck, A.; Wormuth, R.; Rehnisch, O.; Reier, T.: Investigations of the delamination of polymer-coated zink and steel surfaces with the scanning Kelvin probe in a climatic cycle test. In: In: Technical Steel Research, EUR 20348 EN, pp. 1 - 198 (Ed. Steel Research). Steel Research, Brussels, Belgium (2002)
Stratmann, M.; Volmer, M.; Wolpers, M.: Stability and Reactivity of Chemically Modified Iron Surfaces. In: European Conference on Advanced Materials and Processes Proc.. European Conference on Advanced Materials and Processes, Aachen, Germany. (1989)
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…
For understanding the underlying hydrogen embrittlement mechanism in transformation-induced plasticity steels, the process of damage evolution in a model austenite/martensite dual-phase microstructure following hydrogenation was investigated through multi-scale electron channelling contrast imaging and in situ optical microscopy.
We will investigate the electrothermomechanical response of individual metallic nanowires as a function of microstructural interfaces from the growth processes. This will be accomplished using in situ SEM 4-point probe-based electrical resistivity measurements and 2-point probe-based impedance measurements, as a function of mechanical strain and…
Hydrogen induced embrittlement of metals is one of the long standing unresolved problems in Materials Science. A hierarchical multiscale approach is used to investigate the underlying atomistic mechanisms.
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.
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.
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…
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…