The microstructures of pure Fe and various Fe-Cr binary alloys in both the annealed and heavily cold worked conditions were investigated after irradiation to 25.8 dpa at 4x10-7 dpa/s in the BR-10 fast reactor. Microscopy has shown that the largest swelling of 4.5 percent was observed in the cold worked pure iron while that of annealed Fe is only 1.7 percent. Additions of 2 percent chromium resulted in a decrease of swelling, but the swelling of cold worked Fe-2Cr alloy was still higher than that of the annealed condition. Independent of the initial starting condition, swelling in the Fe-6Cr alloy was completely suppressed. In alloys with higher chromium content swelling of 0.04-0,05 percent was observed only in samples irradiated in the annealed condition. There were also significant changes in dislocation and precipitate microstructure.
Revised: September 12, 2006 |
Published: September 1, 2006
Citation
Konobeev Y.V., A.M. Dvoriashin, S.I. Porollo, and F.A. Garner. 2006.Swelling and Microstructure of Pure Fe and Fe-Cr Alloys After Neutron Irradiation to ~26 dpa at 400 degrees C.Journal of Nuclear Materials 355, no. 1-3:124-130.PNNL-SA-36471.