Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-44290 Zeitschriftenartikel Mujica Roncery, L.; Agudo Jįcome, Leonardo; Aghajani, A.; Theisen, W.; Weber, S. Subsurface characterization of high-strength high-interstitial austenitic steels after impact wear The microstructure of the subsurface after impact wear of three high-strength high interstitial austenitic steels has been analysed using transmission electron microscopy (TEM) in alloys with C and N as interstitial elements. In all cases, a nanocrystalline region followed by a transition zone and a cold-worked area are present. Additionally, microhardness and nano-scratching tests were conducted to study the wear-related properties of the impact subsurface and the base material. The results of the microstructural analysis reveal that the following mechanisms are involved during impact wear: abrasion (ploughing), microcrack formation associated with contact fatigue, entrapment and adhesion of SiO2 particles. The analysis of the wear-related properties indicates that the subsurface acts as a self-protective layer that prevents the deterioration of the substrate. Amsterdam Elsevier B.V. 2018 Wear 402-403 137 147 10.1016/j.wear.2018.02.016 2018-02-26 OPUS4-44472 Zeitschriftenartikel Nofz, Marianne; Dörfel, Ilona; Sojref, Regine; Wollschläger, Nicole; Mosquera Feijoo, Maria; Schulz, Wencke; Kranzmann, Axel Thin Sol-Gel Alumina Coating as Protection of a 9% Cr Steel Against Flue Gas Corrosion at 650 °C Samples of sol-gel alumina coated and uncoated P92 steel were exposed to flue gas at 650 °C for 300 h. As result of this treatment a 50 µm thick bi-layered oxide scale had formed on the surface of the uncoated sample. Below the scale a 40 µm thick inner oxidation zone was detected. In contrast, the porous, micron thick alumina coating enabled the formation of a chromium oxide scale with a thickness of some nanometers at the interface between steel substrate and coating. In this case high temperature corrosion of the steel was prevented so far. Springer 2018 Oxidation of Metals 89 3-4 453 470 10.1007/s11085-017-9799-0 2018-03-15 OPUS4-50891 Zeitschriftenartikel Stephan-Scherb, Christiane; Menneken, Martina; Weber, Kathrin; Agudo Jįcome, Leonardo; Nolze, Gert Elucidation of orientation relations between Fe-Cr alloys and corrosionproducts after high temperature SO2 corrosion The early stages of corrosion of Fe-Cr-model alloys (2 and 9 % Cr) were investigated after exposure at 650 °C in0.5 % SO2containing gas by electron backscattered diffraction (EBSD) and transmission electron microscopy(TEM). The impact of the grain orientation of the base alloy on the orientation relations of the corrosion productsis presented. After 2 min-5 min exposure the formation of a multi-layered corrosion zone was discovered. Aclear orientation relationship between ferrite and the (Fe,Cr)3O4 spinel could be demonstrated. The obtainedresults show the importance of the grain orientation on oxidation resistance. Elsevier 2020 Corrosion Science 174 1 11 urn:nbn:de:kobv:b43-508911 10.1016/j.corsci.2020.108809 https://creativecommons.org/licenses/by-nc-nd/4.0/deed.de 2020-06-18