| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Components
|
| Presentation Title |
Controlling Helium Morphology in Pure Metals: Dislocation-helium Interactions |
| Author(s) |
Calvin R. Lear, Jonathan G Gigax, Nan Li, Saryu Jindal Fensin |
| On-Site Speaker (Planned) |
Calvin R. Lear |
| Abstract Scope |
Prolonged irradiation of structural components results in the accumulation of excess microstructural defects, diminished confidence in performance, and increased overall cost. Although the evolution of helium is a vital aspect of structural material degradation, only grain boundary effects on materials strength are well understood. A systematic study of temperature-dose-dose rate interactions was thus performed for helium morphologies in pure metals. Helium implanted samples were probed using a combination of electron microscopy, micro-mechanical, and nano-mechanical techniques. In situ testing was used extensively to better understand changes in deformation mode with implantation and to directly observe dislocation interactions with the helium defects. These findings are considered in terms of materials selection and control of helium defect nucleation and growth. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nuclear Materials, |