Control of phosphorus inter-granular segregation in ferritic steels

Z Lu, RG Faulkner, N Sakaguchi, H Kinoshita, H Takahashi, PEJ Flewitt

Research output: Contribution to journalArticle (Academic Journal)peer-review

12 Citations (Scopus)


Low- and high-alloy ferritic steels, 2.25Cr1Mo and E911, were irradiated by 250 keV Ni+ ions at 300 degreesC to study radiation-induced inter-granular phosphorus segregation behaviour and the effect of hafnium on radiation-induced segregation. Irradiations were carried out in an ion accelerator to a dose of 0.452 dpa for 2.25Cr1Mo and 0.305 dpa for E911 and E911 + 1%Hf. Grain boundary phosphorus segregation was detected by using field emission gun transmission electron microscopy with an energy dispersive X-ray analyzer. The phosphorus segregation at boundaries after irradiation in the high-alloy steel is higher than that in the low-alloy steel. Hafnium can suppress radiation-induced segregation to approximately one-sixth of the level in hafnium-free materials. A model to predict radiation-induced segregation in foil-samples is presented. Site competition between carbon and phosphorus is taken into consideration. The predicted results show good agreement with experimental data. (C) 2004 Elsevier B.V. All rights reserved.
Translated title of the contributionControl of phosphorus inter-granular segregation in ferritic steels
Original languageEnglish
Pages (from-to)1017 - 1021
Number of pages5
JournalJournal of Nuclear Materials
Publication statusPublished - 2004

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