| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
| Presentation Title |
Thermal Stability and Mechanical Behavior in Segregation-Engineered
Nanocrystalline Ternary Al Alloys |
| Author(s) |
Jungho Shin, Fulin Wang, Glenn Balbus, Tianjiao Lei, William Cunningham, Ravit Silverstein, Timothy Rupert, Daniel S. Gianola |
| On-Site Speaker (Planned) |
Daniel S. Gianola |
| Abstract Scope |
The deliberate use of solute enrichment at grain boundaries, otherwise known as segregation engineering, is a promising approach to tailor the properties of interface dominated materials such as nanocrystalline alloys. The ensuing chemical and structural evolution at grain boundaries can give rise to thermal stability and excellent mechanical properties, but the interplay between enrichment, phase decomposition, grain growth, and mechanical behavior exists in a vast composition and processing space. In this study, a combinatorial synthesis and rapid characterization approach was applied to segregation-engineered nanocrystalline Al-X-Z (X=Ni, Fe, Mg, Z=Y, Ce) alloys to assess the evolution of microstructure and resulting mechanical behavior as functions of alloying content and annealing conditions. In addition to the identification of alloys and processing conditions that give rise to exceptional thermal stability, strength retention, and homogeneous plastic flow, we construct combined thermal stability and deformation mechanism maps that demarcate several important regimes of behavior. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Thin Films and Interfaces, Phase Transformations |