| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Effect of Cr and Temperature on Dislocation Loops in Heavy Ion Irradiated Ultra-high Purity FeCr Alloys |
| Author(s) |
Yao Li, Arunodaya Bhattacharya, Ling Wang, Yajie Zhao, Steven Zinkle, Jean Henry |
| On-Site Speaker (Planned) |
Yao Li |
| Abstract Scope |
In Fe and Fe-Cr alloys, a/2<111> and a<100> type loops are observed after irradiations. In this study, we performed multi-temperature (300-450°C) irradiation using 8 MeV Fe ions (ion range of 2 μm) to midrange doses of ~0.35 and 3.5 dpa at dose rates of 10-5 and 10-4 dpa/s on Fe and Fe-xCr model alloys (x = 3- 18wt.%). Loop identification used a combination of conventional diffraction contrast TEM imaging techniques and the g∙b method. Nearly all loops were interstitial-type. We observed petal-shaped loop clusters in samples at 450 ℃ and 0.35 dpa. At 350℃ and 0.35 dpa, dislocations decorated by loops were the major phenomenon. At 350℃ and 3.5 dpa midrange dose, ½ <111> loop fraction increased with increasing irradiation depth, from16% in the near-surface region (0-300nm) to 81% in the beyond-damage region (2350-2600nm) in Fe. Mean loop diameter decreased from 20 nm to 7nm with Cr addition. |
| Proceedings Inclusion? |
Undecided |