Zhong, Q.; Rohwerder, M.; Shi, L.: The effect of ionic penetration on semiconducting behaviour of temporarily protective oil coating on the surface of AISI stainless steel. Materials and Corrosion-Werkstoffe und Korrosion 56 (9), pp. 597 - 605 (2005)
Zhong, Q.; Rohwerder, M.; Chen, W.; Liu, D.: Fuzzy cluster analysis constructed by numeric genetic algorithm (NGA) and its use in the evaluation of heterogeneity of temporarily protective oil coating. Materials and Corrosion-Werkstoffe und Korrosion 55 (12), pp. 930 - 934 (2004)
Zhong, Q.; Rohwerder, M.; Zhang, Z.: Study of lubricants and their effect on the anti-corrosion performance as temporarily protective oil coatings. Surface and Coatings Technology 185 (2-3), pp. 234 - 239 (2004)
Baumert, B.; Stratmann, M.; Rohwerder, M.: The deformation response of ultra-thin polymer films on steel sheet in a tensile straining test: The role of slip bands emerging at the polymer/metal interface. Zeitschrift für Metallkunde 95 (6), pp. 447 - 455 (2004)
Bengtsson Blücher, D.; Svensson, J.-E.; Johansson, L.-G.; Rohwerder, M.; Stratmann, M.: Scaning Kelvin Probe Force Microscopy: A Useful Tool for Studying Atmospheric Corrosion of MgAl Alloys In Situ. Journal of the Electrochemical Society 151, 12, pp. B621 - B626 (2004)
Zhong, Q. D.; Rohwerder, M.; Zhao, Z.; Jin, Z.: Semiconsucting behavior of temporarily protective oil coating on the surface of AISI 304 satinles steel in 5% Na2SO4 soultion during its degradation. Journal of the Electrochemical Society 151, 7, pp. B446 - B452 (2004)
Zhong, Q.; Rohwerder, M.; Zhao, Z.; Jin, Z.: Semiconducting behavior of temporarily protective oil coating on the surface of AISI 304 stainless steel in 5% Na2SO4 solution during its degradation. Journal of the Electrochemical Society 151 (7), pp. B446 - B452 (2004)
Hausbrand, R.; Stratmann, M.; Rohwerder, M.: Delamination resistant zinc alloys: Simple concept and results on the system zinc-magnesium. Steel Research International 74 (7), pp. 453 - 458 (2003)
Zhong, Q.; Xu, N.; Zhou, G.; Rohwerder, M.: Study of electronic-ionic conducting transformation of temporarily protective oil coating in salt solution. Materials and Corrosion-Werkstoffe und Korrosion 54 (2), pp. 97 - 105 (2003)
Rebhan, M. E.; Rohwerder, M.; Stratmann, M.: Delamination of polymeric coatings on silidized iron. Materials and Corrosion-Werkstoffe und Korrosion 54 (1), pp. 19 - 22 (2003)
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…
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.
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…
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.
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
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…