| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments V
|
| Presentation Title |
Advanced In-Situ Strain Mapping for Zr Oxidation by 4D-SPED |
| Author(s) |
Yongwen Sun, Ying Han, Hugo Perez Garza, Alejandro Gomez-Perez, Athanassios S. Galanis, Starvos Nicolopoulos, Dan Zhou, Yang Yang |
| On-Site Speaker (Planned) |
Yongwen Sun |
| Abstract Scope |
Zirconium alloy fuel cladding undergoes oxidation during reactor operations, which compromises its mechanical performance. Effective strain mapping is essential to elucidate strain evolution during oxidation, which could facilitate the development of novel alloys more resistant to oxidation. Here, we introduce an in-situ strain mapping method with nanometer resolution for investigating the zirconium oxidation by integrating four-dimensional scanning precession electron diffraction (4D-SPED), in-situ gas-cell-holder, and a direct electron detector. Successful strain mapping hinges on maintaining a high signal-to-noise ratio in the nano-beam diffraction patterns and minimizing the dynamic effects. The impact of gas pressure, sample thickness and electron beam precession will be explored. Our method facilitates high-quality strain mapping over a large field of view during oxidation with nanometer resolution and opens a new avenue for the study of chemo-mechanical evolutions in materials under harsh environments. |