Twin boundary-accelerated ferritization of austenitic stainless steels in liquid lead-bismuth eutectic

Peter Hosemann, D. Frazer, Erich Stergar, Konstantza Lambrinou

    Research outputpeer-review


    Exposure of austenitic stainless steels to liquid lead–bismuth eutecticwith lowconcentration of dissolved oxygen typically results in selective leaching of highly-soluble alloying elements and ferritization of the dissolution-affected zone. In this work, focused ion beam, transmission electron backscatter diffraction and scanning transmission electron microscopy were utilized to elucidate early-stage aspects of the dissolution corrosion process of cold-worked austenitic stainless steels exposed to static, oxygen-poor liquid lead–bismuth eutectic at 450°C for 1000 h. It was found that deformation-induced twin boundaries in the cold-worked steel bulk provide paths of accelerated penetration of the liquid metal into the steel bulk.
    Original languageEnglish
    Pages (from-to)37-40
    Number of pages4
    JournalScripta Materialia
    Issue number06
    StatePublished - Jun 2016

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