About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Prediction and Characterization of Linear Complexions in Binary Metallic Alloys and Their Impact on Dislocation Mechanics |
| Author(s) |
Hannah C. Howard, W. Streit Cunningham, Colin Bierwagen, Arda Genc, Bailey E. Rhodes, Timothy J Rupert, Daniel S. Gianola |
| On-Site Speaker (Planned) |
Hannah C. Howard |
| Abstract Scope |
Dislocations and the microenvironments surrounding them play a key role in the plastic deformation of crystalline solids. Recently, it has been discovered that local stresses surrounding a dislocation can induce and stabilize the formation of nanoscale phases, termed linear complexions . Due to the local ordering, these linear complexions impact plastic deformation and alter macroscale material properties. We employ thermodynamic models to predict driving forces for solute segregation and phase evolution at dislocations in a multitude of binary systems. Guided by these calculations and atomistic simulations, we fabricate bulk FCC binary alloys that host localized ordering and employ spherical nanoindentation to evaluate strengthening. Indentation results and advanced TEM methods confirm a unique combination of dislocation content and nanoscale ordered domains which serve to impede dislocation glide. These methods advance understanding of the fundamental mechanisms of linear complexion formation and elucidate the connections to macroscale properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Mechanical Properties, Characterization |