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 OPUS4-47118 Beitrag zu einem Tagungsband Olbricht, Jürgen; Agudo Jácome, Leonardo; Jürgens, Maria; Roohbakhshan, Farshad; Fedelich, Bernard; Skrotzki, Birgit Cyclic loading performance and related microstructure evolution of ferritic-martensitic 9-12% Cr steels The current competitive situation on electricity markets forces power plants into cyclic operation regimes with frequent load shifts and starts/shutdowns. In the present work, the cyclic mechanical behavior of ferritic-martensitic 9-12 % Cr steels under isothermal and thermomechanical loading was investigated for the example of grade P92 material. A continuous softening was observed under all loading conditions. The introduction of hold periods to the applied cycles reduced material lifetime, with most prominent effects at technologically relevant small strain levels. The microstructural characterization reveals a coarsening of the original "martensitic" lath-type microstructure to a structure with polygonal subgrains and reduced dislocation density. The microstructural data forms the input for a physically-based modelling approach. MPA/University of Stuttgart 2018 Fit for Future - Advances in Materials, Manufacturing and Assessment. Proceedings of the 44th MPA-Seminar 44th MPA-Seminar Leinfelden/Stuttgart, Germany 17.10.2018 18.10.2018 259 265 2019-01-02