The purpose of this effort is to determine the influence of dpa rate, He/dpa ratio and composition on the void swelling of simple binary Fe-Cr alloys. Contrary to the behavior of swelling of model fcc Fe-Cr-Ni alloys irradiated in the same FFTF-MOTA experiment, model bcc Fe-Cr alloys do not exhibit a dependence of swelling on dpa rate at approximately 400 degrees C. This is surprising in that an apparent flux-sensitivity was observed in an earlier comparative irradiation of Fe-Cr binaries conducted in EBR-II and FFTF. The difference in behavior is ascribed to the higher helium generation rates of Fe-Cr alloys in EBR-II compared to that of FFTF, and also the fact that lower dpa rates in FFTF are accompanied by progressively lower helium generation rates.
Revised: April 13, 2007 |
Published: December 31, 2002
Citation
Garner F.A., L.R. Greenwood, T. Okita, N. Sekimura, and W.G. Wolfer. 2002.NEUTRON-INDUCED SWELLING OF Fe-Cr BINARY ALLOYS IN FFTF AT ~400 DEGREES C. In Fusion Materials: Semiannual Progress Report for Period ending December 31, 2002, edited by Ron Klueh and Renetta Godfrey. 99-104. Washington, Dc:DOE Office of Fusion Energy Sciences.PNNL-SA-38242.