About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Kinetics and Mechanisms Under External Forcing-Driven Conditions
|
| Presentation Title |
Shear-Driven Atomic Transport and Compositional Patterning in Additive Friction Stir Deposition of Immiscible Binary Systems |
| Author(s) |
Abhishek Rastogi, Hang Yu |
| On-Site Speaker (Planned) |
Abhishek Rastogi |
| Abstract Scope |
Additive friction stir deposition represents a next-generation solid-state additive manufacturing approach offering excellent build quality and scalability. During deposition, each material voxel follows an intricate three-dimensional flow path, experiencing rapid shear at elevated temperatures. The rapid and intense shear drives the system far from equilibrium, enabling unique kinetic pathways and peculiar material evolution phenomena. This study examines the progression and mechanisms of atomic transport and unconventional phase formation in immiscible A–B binary systems. Under sustained shearing, the system could reach a self-organized steady state characterized by finite-scale compositional domains enriched in either A or B. In systems with negative enthalpy of mixing, these submicron domains may undergo atypical phase transformations, including intermetallic formation. The compositional pattern is shown to result from the dynamic interplay between kinetic roughening at interfaces, shear-induced instability, and thermally activated interdiffusion. |
| Proceedings Inclusion? |
Planned: |