About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bridging Scales: Deformation and Damage Mechanisms in Microstructurally and Compositionally Complex Metallic Alloys
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| Presentation Title |
Multiscale insights into plastic deformation in phase-segregated ternary CCAs |
| Author(s) |
Xiang Chen |
| On-Site Speaker (Planned) |
Xiang Chen |
| Abstract Scope |
Motivated by the search for complex concentrated alloys (CCAs) suitable for friction stir welding, this study investigates dislocation-mediated plastic deformation in three ternary face-centered cubic (FCC) CCAs. First, molecular dynamics (MD) simulations, combined with the Monte Carlo algorithm and the nudged elastic band (NEB) method, are used to quantify lattice friction and interface resistance at the single-dislocation level across a range of temperatures. Both random and short-range-ordered CCAs are examined. Second, nano-pillar compression MD simulations are conducted to analyze stress–strain behavior alongside dislocation density evolution, offering additional insights into the role of long-range dislocation interactions in governing flow stress. Finally, thermodynamic principles are applied to develop a framework for bridging atomistic simulations with continuum-scale models. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, High-Entropy Alloys |