| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Grain Boundaries and Interfaces: Metastability, Disorder, and Non-Equilibrium Behavior
|
| Presentation Title |
2nd Generation of Nanocrystalline Cu-3Ta with Improved Precipitate Coherency |
| Author(s) |
Billy Chad Hornbuckle, Josh Smeltzer, Albert Ostlind, Blake Fullenwider, Chris Marvel, Anit Giri, Martin Harmer, Kiran Solanki, Kris Darling |
| On-Site Speaker (Planned) |
Billy Chad Hornbuckle |
| Abstract Scope |
While a multitude of strategies to enhance a material’s strength exist, the creation and maintenance of coherent interfaces between precipitates and the matrix is one of the most effective and well established methods. Nanocrystalline Cu-Ta has utilized this strategy, in the form of coherent Ta-rich atomic clusters which exhibited spherical morphologies. These clusters form spontaneously and stochastically upon thermal decomposition, thereby providing an opportunity to interject additional engineering design through further solute additions. Subsequently, the authors have taken the next evolutionary step with the discovery and strategic formation of a novel ordered structure in chemically optimized, nanocrystalline Cu-3Ta alloy. The new cuboidal atomic clusters exhibit enhanced coherency and stability relative to their spherical predecessors imparting the alloy with improved physical response. Atom probe tomography and aberration-corrected STEM determined the cluster’s crystal structure and chemistry, and the role they played to prevent coarsening at elevated temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Characterization |