Multiscale investigation of quasi-brittle fracture characteristics in a9Cr–1Mo ferritic–martensitic steel embrittled by liquid lead–bismuthunder low cycle fatigue

Xing Gong, Pierre Marmy, Volodin Alexander, Behnam Amin-Ahmadi, Ling Qin, Dominique Schryvers, Serguei Gavrilov, Erich Stergar, Bert Verlinden, Martine Wevers, Marc Seefeldt

    Research outputpeer-review


    Liquid metal embrittlement (LME) induced quasi-brittle fracture characteristics of a 9Cr–1Moferritic–martensitic steel (T91) after fatigue cracking in lead–bismuth eutectic (LBE) have been inves-tigated at various length scales. The results show that the LME fracture morphology is primarilycharacterized by quasi-brittle translath flat regions partially covered by nanodimples, shallow secondarycracks propagating along the martensitic lath boundaries as well as tear ridges covered by micro dimples.These diverse LME fracture features likely indicate a LME mechanism involving multiple physical pro-cesses, such as weakening induced interatomic decohesion at the crack tip and plastic shearing inducednano/micro voiding in the plastic zone.
    Original languageEnglish
    Pages (from-to)137-152
    JournalCorrosion Science
    StatePublished - 14 Oct 2015

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