Abstract
Forming suitable oxide scales on the surface of T91 steel by controlling the oxygen concentration has been considered as an effective method to restrain the liquid metal corrosion of T91 steel exposed to lead-bismuth eutectic (LBE). Notably, the successful precondition of this method is that the oxide scales on T91 steel can not be damaged easily, especially in flowing LBE environment. In the present study, laser surface remelting (LSR) treatment is employed to enhance the damage resistance of oxide scales on T91 steel under the flowing (∼3 m/s) oxygen-saturated LBE conditions at 500 ℃. The experimental results reveal that although the T91 steel specimens subjected to LSR treatment still process a double-layered oxide scales comprising an outer magnetite layer and an inner Fe-Cr spinel layer, their damage resistance ability is remarkably stronger compared the as-received T91 steel specimens in flowing LBE environment. Further observations indicate that such phenomenon should be ascribed to fewer microstructural defects, such as LBE-filled holes within the oxide scales, resulting from the refined microstructure and high density of dislocations activated in LSR specimens. Accordingly, the possible reasons behind these phenomena were proposed, and a corresponding damage model of oxide scales in flowing LBE condition was established.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
