| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Understanding the Role of Short-Range Order on Defect Thermodynamics in Tungsten Alloys |
| Author(s) |
Maheshwari Meesa, Prashant Singh, Nicolas Argibay, Vijay Vasudevan, Srinivasan Srivilliputhur |
| On-Site Speaker (Planned) |
Maheshwari Meesa |
| Abstract Scope |
Tungsten-based refractory high-entropy alloys (HEAs) are prime candidates for plasma-facing materials (PFM) in a tokamak fusion device, as they can withstand the intense heat, neutron flux, ion impact and related sputtering events. The mechanical behavior in these chemically complex alloys has strong sensitivity to irradiation due to point-defect formation, however, there has been scant attention on understanding vacancy stability and diffusion in presence of short-range order in W-rich alloys. In this work, we provide key quantum mechanical insights to factors controlling thermodynamic, structural, and electronic-structure stability of disordered tungsten alloys in presence of point-defects, i.e., vacancies. We also discuss the effect of short-range on defect energy landscape such as defect formation energy and energy-barrier. The thermodynamic and electronic-structure understanding of defect formation and diffusion behavior presented in this work will provide atomistic insights to manipulate and improve the high-temperature thermo-mechanical properties of tungsten alloys for Nuclear fusion application. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Entropy Alloys, Computational Materials Science & Engineering |