About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
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| Presentation Title |
Chemical Anisotropy Governs Radiation-Induced Defects in Refractory Multiple Principal Element Alloys |
| Author(s) |
Annie Barnett, Emily Hopkins Mang, Xinyao Wang, Wei-Ying Chen, Patrick Callahan, Keith Knipling, David Rowenhorst, Jaime Marian, Michael Falk, Mitra L. Taheri |
| On-Site Speaker (Planned) |
Annie Barnett |
| Abstract Scope |
Refractory multiple principal element alloys possess the high temperature properties required for application in modern nuclear energy systems due to the complex chemical environment. The lattice heterogeneities associated with local chemical fluctuations alter fundamental deformation modes in BCC systems due to increased sensitivity of non-glide stresses. Despite the existence of inherent site-occupancy preferences before exposure to radiation, we demonstrate that chemical order around defects is altered during radiation processes. This evolving order environment dictates the length-scale and spatial distribution of defect structures upon increasing radiation damage due to the effect of chemical order on preferred dislocation glide trajectories. We employ both 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: |
| Keywords |
High-Entropy Alloys, Nuclear Materials, Characterization |