The main parameters influcencing the creep resistance of advanced 9-12% Cr-Steels for power plant applications

H. Cerjak, P. Hofer, B. Schaffernak, K. Spiradek-Hahn, Günter Zeiler

    Publikation: Beitrag in Buch oder TagungsbandBuchkapitel


    The extrapolation of long term creep ruptre strengths from short term creep tests is particularly problematic for the group of 9-12% steels group, because their martensitic microstructure shows a low stbility at service conditions. During creep as well as under thermal exposure in the range of about 600°C significant microstructural changes occur and can be observed. The martensitic lath structure changes towards a subgrain structure with a low dislocation density, whcih is in accordance with the state of the thermodynamic equilibrium. This evolution is accompanied by the growth of precipitates from the as received state (M22C6) as well as by the formation of the relatively rapidly coarsening Laves phase, which is connected with a matrix depletion of W and Mo.
    TitelMaterials for Advanced Power Engineering 1998 Cost Proceedings Part I
    PublikationsstatusVeröffentlicht - 1998

    Research Field

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