About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Tackling Structural Materials Challenges for Advanced Nuclear Reactors
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Presentation Title |
In Situ Dual Ion Irradiation of Additively Manufactured Reduced Activation Ferritic-martensitic Steels |
Author(s) |
Robert B. Renfrow, T.M. Kelsy Green, Priyam Patki, Wei-Ying Chen, Christopher R. Field, Kevin G. Field |
On-Site Speaker (Planned) |
Robert B. Renfrow |
Abstract Scope |
Additively manufactured (AM) reduced activation ferritic-martensitic (RAFM) steels are attractive materials for structural components in fusion reactors. However, an existing knowledge gap for AM-RAFM steels is the role of helium in the microstructural evolution under irradiation since fusion reactors will produce a helium concentration per dpa different than any fission irradiation spectrum. Therefore, helium’s role in the dynamic behavior of dislocation loop formation and growth must be determined to understand the fundamental mechanisms of irradiation behavior in novel AM-RAFM steels. To observe these helium-induced effects, in situ dual-ion (Kr+He) irradiations were conducted at the IVEM-Tandem facility at ANL. Quantification of dislocation loop size and density was performed in real-time and post-acquisition using machine learning techniques during irradiation and by human quantification at discrete irradiation steps. It was concluded that the time to reach saturation of loop formation decreases with increasing helium content when all other irradiation factors are held constant. |