| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Seaborg Institutes: Emerging Topics in Actinide Materials and Science
|
| Presentation Title |
Hydrogen Embrittlement in Uranium: From Hydrides to Plastic Effects |
| Author(s) |
Mary O'Brien, Jason Cooley, Samantha Lawrence |
| On-Site Speaker (Planned) |
Mary O'Brien |
| Abstract Scope |
Hydrogen embrittlement is a long-standing challenge in metallurgy due to unpredictable failures observed in numerous metallic systems exposed to hydrogen-containing environments. Ductility loss is attributed to any combination of the following: formation of brittle hydrides upon supersaturation, decohesion along boundaries attributed to trapped hydrogen, or hydrogen-enhanced localized plasticity due to soluble hydrogen. Hydrogen has been observed to localize plasticity by reducing dislocation spacing at pile-ups, but additional effects of hydrogen on plasticity are possible. Diffusible hydrogen may depress the stress necessary for dislocation movement and, by extension, result in early-onset plasticity. Uranium, with its low symmetry crystal structure, presents a unique opportunity to observe the proposed hydrogen-induced early-onset plasticity without added complications of slip system interactions that occur in most engineering materials. This talk will discuss current research frontiers in hydrogen/uranium interactions, with emphasis on recent investigations into the effect of soluble hydrogen on plasticity in uranium. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Mechanical Properties, Environmental Effects |