| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
|
| Presentation Title |
Influence of Irradiation-Induced Ordering on Defect Evolution in BCC MPEAs |
| Author(s) |
Annie Barnett, Emily Hopkins Mang, Wei-Ying Chen, Jaime Marian, Patrick Callahan, Michael Falk, Mitra Taheri |
| On-Site Speaker (Planned) |
Annie Barnett |
| Abstract Scope |
Refractory high-entropy alloys possess the high temperature properties required for application in modern nuclear energy systems due to the complex chemical interactions of multiple principal alloying elements. This heterogeneous chemical environment acts as an obstacle to failure under external stressors, such as irradiation. Despite the existence of inherent site-occupancy preferences before exposure to radiation, we demonstrate that chemical order is altered during irradiation-induced Frenkel pair generation. This evolving order environment dictates the length-scale and spatial distribution of defect structures upon increasing damage due to the effect of chemical order on local defect activation energies. We employ in-situ irradiation and post-mortem transmission electron microscopy (TEM) analysis to probe the evolution of defects under ion dose. The chemical distribution of these landscapes post-irradiation are characterized using atom-probe tomography (APT) and atomistic simulations (MD). |
| Proceedings Inclusion? |
Planned: |