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

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  • University of California - Berkeley Etcheverry Hall

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Abstract

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.

Details

Original languageEnglish
Pages (from-to)37-40
Number of pages4
JournalScripta Materialia
Volume118
Issue number06
DOIs
Publication statusPublished - Jun 2016

Keywords

  • steel, liquid metal corrosion (LMC), Focused uin beam (FIB), Electron Backscattering diffraction (EBSD), Scanning/transmission electron microscopy (STEM)

ID: 783060