Orientation relationship of the austenite-to-ferrite transformation in austenitic stainless steels due to dissolution corrosion in contact with liquid Pb-Bi eutectic

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Abstract

The orientation relationship of an austenite-to-ferrite phase transformation in 316L stainless steels induced by the loss of austenite stabilizers resulting from the steel dissolution corrosion in liquid Pb-Bi eutectic was studied by means of electron backscatter diffraction. The misorientations at the austenite/ferrite interface were compared to the prevailing orientation relationship models in steels. The Pitsch orientation relationship model was found to be predominant, which is unusual for austenite-to-ferrite bulk transformations in steels. The nature of this particular transformation, which involves loss of steel alloying elements and the presence of an interfacial liquid metal layer, is discussed to explain this finding.

Details

Original languageEnglish
Article number167
Pages (from-to)66-70
Number of pages5
JournalScripta Materialia
Volume167
DOIs
StatePublished - 27 Mar 2019

Keywords

  • Austenitic stainless steels, Liquid metal corrosion, Fcc-to-bcc phase transformation, Electron backscatter diffraction (EBSD), Orientation relationships

ID: 5148013