About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nano and Micro Additive Manufacturing
|
| Presentation Title |
In-Situ Observations of Stability & Strengthening Behaviors in High-Rate Deformed Additively Manufactured Eutectic High-Entropy Alloys |
| Author(s) |
Leora E. Dresselhaus-Marais |
| On-Site Speaker (Planned) |
Leora E. Dresselhaus-Marais |
| Abstract Scope |
Compositionally complex alloys with 5 or more principal components (aka high-entropy alloys, HEAs) exhibit unusual mechanical properties. Eutectic HEA AlCoCrFeNi2.1 was recently shown to exhibit simultaneously high strength and ductility when fabricated with laser powder-bed fusion due to phase-boundary effects from its nano-lamellar FCC/BCC phases structure (Nature 608, 62-68, 2022). The intrinsic stability of this alloy requires the dual-phase structure and thus must be studied in the relevant operating environment for the extreme conditions it was made for. I will present our high-pressure studies of the as-cast and LPBF versions of this eutectic HEA in which we use in-situ X-ray diffraction to measure the phase diagram of these materials under static compression and shock compression. Our in-situ experiments reveal phase transitions and exotic phenomena upon cooling that illustrate important criteria for the mechanical properties of these unique materials. This work is supported by the DOE NNSA Center of Excellence CAMCSE. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |