|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||The Effect of Pre-implanted Helium on Void Incubation and Growth in Ferritic-Martensitic Steels
||Anthony Monterrosa, Zhijie Jiao, Gary S Was
|On-Site Speaker (Planned)
Ion irradiation is often used to emulate radiation damage in reactor structural materials. To compensate for lack of transmutation reactions, helium is implanted into the samples prior to irradiation. Samples of ferritic-martensitic alloys HT9 and T91 were pre-implanted with helium levels varying from 0 to 100 appm. Irradiations at 460°C using 5 MeV Fe2+ ions were performed at the Michigan Ion Beam Laboratory in an attempt to achieve steady-state swelling for each of the helium pre-implantation conditions. The effect of varying levels of pre-implanted helium on the incubation dose and on the steady-state swelling rate was assessed. It was found that a helium level of 1 appm resulted in a low steady-state growth rate (0.009%/dpa) compared to 10 appm, (0.02%/dpa). A high helium level of 100 appm was studied to assess whether void growth would be suppressed at higher helium levels.
||Planned: A print-only volume