Abstract
Radiation-induced segregation at grain boundaries, precipitate/matrix interfaces, and dislocations were analyzed using atom probe tomography in ferritic–martensitic alloys HCM12A, T91 and HT-9 following proton irradiation to 7 dpa at 400 °C and in HCM12A following Fe 2+ ion irradiation to 100 dpa at 500 °C. Segregation of Cr varied considerably among grain boundaries (from depletion to enrichment). However, segregation of Ni, Si, Mn, P (enrichment) and W (depletion) at grain boundaries was rather consistent. Radiation-induced segregation at 100 dpa by Fe 2+ was very comparable to that at 7 dpa by protons in both segregation tendencies and magnitudes in HCM12A. Although segregation magnitudes varied, similar segregation tendencies at sinks were observed among HCM12A, T91 and HT-9. Cr, Ni, Si and P tended to enrich at precipitate/matrix interfaces, which may promote the formation of new phases at these sites. Enrichment of Ni and Si at sinks was consistently observed in the three alloys regardless of sink types (grain boundaries, dislocations or the precipitate/matrix interfaces of the Cr carbides).
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.
