Swelling and Alloy Stability of Potential Fast-Breeder-Reactor Structural Alloys Irradiated in NRL Experiment H-5.

摘要

Seven commercial alloys of potential interest for fast-breeder-reactor structural alloys have been irradiated in the EBR-II to a fluence of 1.6 X 10 to the 22nd power n/sq cm, E>0.1 MeV, at 455 C (850 F) and subsequently examined and analyzed using transmission electron microscopy. Irradiated were Inconel 718, Incoloy 800, Inconel 600, Inconel 625, PE-16, Sandvik 12R72HV, and Inconel 744. The experiment was designed to examine the alloy stability during irradiation and to measure swelling resistance. Inconel 718 and PE-16 exhibited the best swelling. resistance, and Sandvik 12R72HV and Incoloy 800 had the poorest resistance to swelling. Inconel 744, an experimental superplastic alloy with a duplex microstructure, exhibited one of the highest swelling rates known for the austenite phase but showed no swelling for the ferrite phase. Inconel 625, Inconel 600, and Incoloy 800 showed extensive precipitation of phases not present prior to irradiation. (Author)