| 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 |
Role of local chemical ordering on the strengthening properties of structural alloys |
| Author(s) |
Edwin Antillon |
| On-Site Speaker (Planned) |
Edwin Antillon |
| Abstract Scope |
The interplay between local chemical ordering (LCO) and mechanical strengthening in alloys has emerged as a pivotal area of materials science, offering insights critical for the development of next-generation structural materials. In this talk I will describe how local atomic-scale ordering, characterized by non-random distribution of different types in the lattice, can alter dislocation-solute interactions and lead to strengthening or softening. Large-scale atomistic simulations are used to investigate how current strengthening theoretical models (Varvenne-Curtin-Nag, Rao-Suzuki) can be modified to account for the emergence of local ordering at various annealing temperatures. Lastly, a case study focusing on a well-established Austenitic Steel alloy (316) will be investigated under various annealing conditions. Indications for LCO will be explored using both simulation methods (ab-initio, molecular dynamics) and experimental measurements (atom-probe tomography, Vickers micro-indentation). The results will demonstrate the crucial role of solute interactions and magnetic effects in reconciling atomistic simulation findings with experimental observations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, High-Entropy Alloys |