| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Design of Vanadium Alloys for Fusion Applications |
| Author(s) |
Daniel Ng, Malik Wagih, Tianjiao Lei, Christopher Schuh |
| On-Site Speaker (Planned) |
Daniel Ng |
| Abstract Scope |
A fine, stable grain size is desirable for structural metals used in fusion reactors, as it can simultaneously increase strength and provide sinks for radiation-induced defects. Solutes with a thermodynamic preference to segregate to grain boundaries can stabilize them, making this a prime consideration for alloy design. However, there are limited solute segregation data on candidate fusion alloys such as vanadium, which is of interest for its low neutron activity and high thermal stress factor. This talk overviews a combined machine learning and molecular mechanics framework developed to calculate grain boundary segregation energy spectra from ab initio methods, enabling predictions of solute segregation strength in vanadium-base binary alloys across the periodic table. Select nanocrystalline alloys were synthesized through powder metallurgy, with their solute distribution and thermal stability characterized to validate computational predictions. The role of segregating species on other important engineering factors, including properties and processability, are also discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Computational Materials Science & Engineering, Characterization |