About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Tackling Structural Materials Challenges for Advanced Nuclear Reactors
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Presentation Title |
Defect Dynamics and Far-from-Equilibrium Microstructure Evolution in Concentrated Alloys |
Author(s) |
Yanwen Zhang, Matheus A. Tunes, Stephen E. Donnelly, Philip D. Rack, William J. Weber |
On-Site Speaker (Planned) |
Yanwen Zhang |
Abstract Scope |
In a radiation environment, energetic particles carry substantial momentum. Significant energy loss to electrons and nuclei induces far-from-equilibrium athermal processes.1 Concentrated solid-solution alloys (CSAs) exhibit distinct chemical disorder that affects energy dissipation and defect evolution processes.2 Compared with thermally-driven events, athermally-driven processes are generally weakly dependent on or independent of temperature. The athermal processes can be largely considered as a far-from-equilibrium state (localized resolidification after the ballistic phase as the shockwave transitions to a sonic velocity) followed by a close-to-equilibrium state (the electron, phonon, and magnon contributions to heat conduction during the kinetic phase).1,2 In this presentation, early-stage defect production and damage accumulation from radiation-induced nonequilibrium processes in CSAs are discussed. Late-stage microstructural evolution when damage accumulates is deliberated in comparison of both chemically simple and complex CSAs.
References
1. Applied Physics Review, 7 (2020) 041307.
2. Chemical Reviews 122 (2022) 789–829. |