| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Discovery and Insertion of Next Generation Structural Materials
|
| Presentation Title |
Optimizing BCC/B2 Microstructures in AlCrMnTiV High Entropy Alloys by Combinatorial Synthesis |
| Author(s) |
Keith E. Knipling, Shelby Fields, Steven Bennett |
| On-Site Speaker (Planned) |
Shelby Fields |
| Abstract Scope |
Previous work on an Al-rich Al<sub>2.7</sub>CrMnTiV high entropy alloy indicates that it contains a high number density of ∼50 nm ordered B2 cuboids that are coherent with the BCC matrix, resembling the well-known γ-γ' microstructures in Ni-based superalloys but in a BCC system. To further optimize the volume fraction of these strengthening precipitates, we have employed combinatorial magnetron sputtering to create a composition spread in this alloy system. Through the tuning of deposition powers, this process has been optimized to account for species-dependent sputter yields to achieve a nearly equiatomic composition at the wafer center position. We will correlate the alloy microsctructures, observed using a combination of X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM/TEM), and atom-probe tomography (APT), to the alloys’ mechanical properties measured by nanoindentation. |
| Proceedings Inclusion? |
Planned: |