| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Methods, Techniques, and Materials Discovery of Irradiation Effect Using In-situ Microscopy
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| Presentation Title |
Evolution of Vacancy/Interstitial Dislocation Loops in Pure Zr and Ti at Elevated Temperatures Observed by In-situ TEM Annealing |
| Author(s) |
Fei Long, Matthew Topping, Zhongwen Yao, Malcolm Griffiths, Mark R. Daymond |
| On-Site Speaker (Planned) |
Fei Long |
| Abstract Scope |
Pure Zr and Ti were irradiated to two dpa levels by proton irradiation. The nature of the dislocation loops were determined by TEM STEM-HAADF imaging, and the amount of interstitial/vacancy loops were quantitatively analyzed. Both interstitial and vacancy <a> type loops were induced by the irradiation in the low dpa sample, while the <c> component loops were exclusively found to be vacancy type in the high dpa sample. In-situ TEM heating was applied to observe the evolution of dislocation loops during high temperature annealing at 500°C. The interstitial and vacancy <a> loops showed different growth behavior, through which the effect of point defect on the loop growth is evaluated. The <c> component loops showed higher resistance to heating. Through a combination of proton irradiation and in-situ TEM annealing in the pure system of Zr and Ti, the findings helped to explain growth behavior of neutron irradiated zirconium alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, |