Fracture mechanics behavior of the T91 martensitic steel in contact with liquid lead–bismuth eutectic for application in an accelerator driven system

Thierry Auger, Dominique Gorse, Zehoua Hamouche-Hadjem, Joris Van den Bosch, Gunter Coen, Abderrahim Almazouzi, Anna Hojna, K. Dalikova, Fosca Di Gabriele, Marta Serrano, Alessandro Gessi, Pietro Agostini, Jean-Bernard Vogt, Ingrid Serre, Serguei Gavrilov

    Research outputpeer-review


    The fracture toughness of the T91 martensitic steel in liquid lead–bismuth eutectic has been measured at 300 °C in plane stress and plane strain conditions. The effect of achieving wetting at the crack tip prior starting mechanical testing is demonstrated to be the key factor for a correct evaluation of the potential effect of LBE on fracture toughness. In plane stress, one observes a serrated fracture mode associated with a reduction of fracture toughness between 20% and 30%. The toughness reduction is higher in plane strain where the cleavage fracture mode prevails. The difference between the two fracture modes is due to the higher plastic deformation level reached at final fracture in plane stress and to the higher crack growth rate in plane strain. These results will be useful for the design of future nuclear systems cooled by LBE planning to use martensitic steels as structural materials.
    Original languageEnglish
    Pages (from-to)293-301
    JournalJournal of Nuclear Materials
    Issue number3
    StatePublished - 31 Aug 2011
    EventInternational DEMETRA Workshop on Development and Assessment of Structural Materials and Heavy Liquid Metal technologies for Transmutation Systems - FZK Karlsruhe, Berlin
    Duration: 2 Mar 20104 Mar 2010

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