|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Effect of Helium Implantation Mode on Void Formation in Ion-Irradiated T91 Steel
||Stephen Taller, Zhijie Jiao, Elizabeth Getto, Anthony M Monterrosa, Gary S Was
|On-Site Speaker (Planned)
To emulate neutron irradiation microstructures with high fidelity, the effects of transmutation gas, such as helium, on the microstructure need to be understood. Dual ion beam irradiation can be used as a surrogate with heavy self-ions to induce damage and light ions to implant gas atoms simultaneously, better emulating in-reactor conditions. Irradiations using Fe2+ ions to induce damage along with either pre-implanted or co-injected He2+ to simulate gas transmutation buildup, were performed at the Michigan Ion Beam Laboratory on the ferritic-martensitic alloy T91 irradiated to 20 dpa at 420°C, 440°C, and 470°C. Voids, precipitates and dislocation loops were characterized using transmission electron microscopy and atom probe tomography to understand the effect of the mode of helium introduction on microstructure development.
||Planned: A print-only volume