About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
Solidification Modes and Microstructural Evolution in Additively Manufactured AlCoCrFeNi Multi-Principal Element Alloys |
| Author(s) |
Mahya Azizi, Muhammad Akmal, Chenxi Tian, Akane Wakai, Kaushlendra Singh, Sai Pratyush Akula, Amlan Das, Kate Shanks, Atieh Moridi |
| On-Site Speaker (Planned) |
Mahya Azizi |
| Abstract Scope |
AlCoCrFeNi is a multi-principal element alloy (MPEA) system that exhibits FCC, BCC, and ordered phase formation, making it well-suited for detailed investigations of phase transformations during rapid solidification. Based on compositional variations known to influence phase formations, we selected three alloys within this system that exhibit distinct phase behaviors. These compositions were atomized and fabricated using the directed energy deposition (DED) additive manufacturing technique. Through operando synchrotron X-ray diffraction and post-process multiscale microscopy, we identified three distinct microstructures: a single-phase structure, a dual-phase eutectic-like morphology, and a dual-phase dendritic structure. Our findings demonstrate that rapid solidification in the DED process, combined with compositional tuning, significantly influences elemental segregation and phase evolution. These results highlight the interplay between alloy chemistry and solidification pathways in determining final microstructures, offering valuable insights into phase control strategies for advanced MPEAs fabricated via additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Solidification |