Twin boundary-accelerated ferritization of austenitic stainless steels in liquid lead–bismuth eutectic. (June 2016)

• Record Type: Journal Article
• Authors: Hosemann, P.; Frazer, D.; Stergar, E.; Lambrinou, K.
• Is Part Of: Scripta materialia. Volume 118(2016)
• Page Start: 37
• Page End: 40
• Publication Date: 2016-06
• Subjects: Steels -- Liquid metal corrosion (LMC) -- Focused ion beam (FIB) -- Electron backscattering diffraction (EBSD) -- Scanning/transmission electron microscopy (STEM); Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.02.029
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Exposure of austenitic stainless steels to liquid lead–bismuth eutectic with low concentration 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. Graphical abstract: