About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Ordering in Materials and Its Impacts on Mechanical Behaviors, Radiation Damage, and Corrosion
|
| Presentation Title |
Ordering and Disordering of Helium Bubbles and Precipitates in Materials Studied Using Small Scale Mechanical Testing |
| Author(s) |
Peter Hosemann, Mehdi Balooch, Yujun Xie, H. V. Tin, David Frazer |
| On-Site Speaker (Planned) |
Peter Hosemann |
| Abstract Scope |
Nuclear materials research features some of the most interesting and unique property-structure relationships in material science. Some unique defect structures that can only be created by radiation damage occur and lead to changed properties. Helium bubbles for example are usually created via nuclear reactions or direct ion implantation can create superlattices or align themselves on grain boundaries or dislocations leading to macroscopic issues such as embrittlement.
Other treatments on nuclear materials such as long-term aging can also lead to ordered features such as found in the Ni-Cr system and again lead to macroscopic property changes that can lead to engineering concerns. However further radiation damage, excessive heat treatments, or ordinary plastic deformation can change these features and depending on the detailed mechanism destroy the ordered structures. However, other plastic deformation mechanism such as twinning can maintain the order or change the order while still accommodating a permanent shape change. In this work we feature how Helium bubble structures can change under plastic deformation and how Helium bubbles can be rearranged to cause larger defects. Further we investigate how the plastic deformation mechanism are influenced by ordered structures. |
| Proceedings Inclusion? |
Planned: |