| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
H-62: Radiation Tolerance of Gradient Grain-structured Copper |
| Author(s) |
Heather Salvador, Yiwei Sun, Trevor Clark, Khalid Hattar, Sina Shahrezaei, Suveen N. Mathaudhu |
| On-Site Speaker (Planned) |
Heather Salvador |
| Abstract Scope |
Radiation tolerance of metals and alloys has been studied as a function of grains size with studies showing enhanced radiation defect tolerance in nanocrystalline materials through increased grain boundary area, while other reports show a loss of radiation tolerance due to the loss of grain boundary stability from the highly energetic nature of nanocrystalline grains. These findings point to using a heterogeneous grain structure to achieve a balance of beneficial properties and microstructural stability. In this study, we investigate the microstructural evolution and radiation damage in gradient grain size Cu exhibiting a grain distribution of <50 nm to ~0.5 mm. Through in situ Cu-ion irradiation, electron microscopy, and hardness measurements parallel and perpendicular to the gradient, damage evolution and resulting mechanical response can be explored as a function of grain size. Advantages and disadvantages of gradient grain-structured alloys will be discussed base on the experimental observations. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |