About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
No Man's Land of Alloy Solidification |
| Author(s) |
Yifan Cao, Alain Karma, Raymundo Arroyave, Rodrigo Freitas |
| On-Site Speaker (Planned) |
Yifan Cao |
| Abstract Scope |
Solidification under far-from-equilibrium conditions governs microstructure evolution in advanced manufacturing, yet the kinetic limits of alloy solidification remain poorly understood. Using large-scale atomistic simulations of alloy solidification, we quantify the inaccessible region of temperature–composition space, a “no man’s land” unreachable under any growth conditions due to kinetic constraints at the solid–liquid interface.
As liquid atoms approach the interface, they develop solid-like order, a phenomenon known as interface-induced ordering (IIO). This ordering suppresses solute transport where partitioning occurs, creating a kinetic bottleneck that limits accessible interfacial states during solidification. Atomistic measurements reveal interfacial diffusivities orders of magnitude lower than those in the bulk liquid, providing mechanistic explanation for the longstanding discrepancies between the Continuous Growth Model and experimentally observed solute-trapping behavior. Building on these results, we construct a nonequilibrium phase diagram directly from solidification simulations and demonstrate how atomistically quantified interfacial diffusivity can improve mesoscale models of alloy solidification. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Modeling and Simulation, Thin Films and Interfaces |