About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Interrelated Extremes in Materials Degradation for Fission and Fusion Environments
|
| Presentation Title |
Impact of Oxidation temperatures and different Helium Irradiation doses-Induced Defects in Fe-18Cr |
| Author(s) |
Mira Khair, Patrick Warren, Shakira Medellin, Mehdi Balooch, Peter Hosemann, Elizabeth Sooby |
| On-Site Speaker (Planned) |
Mira Khair |
| Abstract Scope |
This study investigates the effect of oxidation temperature on different helium doses irradiation -induced defects in Fe-18Cr alloys. The samples were fabricated via arc melting and irradiated using the Orion Nanofab Helium Ion Beam Microscope (HIM) at Berkeley's QB3 facility. 10×10 μm squares of Helium ion implantation was performed at 25 keV and approximately 100 mA, with ion doses of 2 × 1017, 5 × 1017, and 1 × 1018 ions/cm². Following irradiation, the samples underwent oxidation in synthetic air (Ar-20%O2) at 600°C and 700°C for 10 hours, to examine the influence of temperature on defect evolution at each helium dose. Transmission electron microscopy (TEM) was employed to analyze bubble formation, defect structures, and the composition and evolution of the oxide layers. The results provide valuable insights oxidation and helium irradiation double effect, particularly the development of bubbles, voids, and chemical segregation in Fe-18Cr alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Phase Transformations |