About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Design of Refractory High Entropy Alloys with Suppressed Elemental Segregation for Laser Powder Bed Fusion Process |
| Author(s) |
Ozkan Gokcekaya, Takayoshi Nakano |
| On-Site Speaker (Planned) |
Ozkan Gokcekaya |
| Abstract Scope |
Refractory high entropy alloys (RHEAs) are attracting attention as next-generation materials due to their exceptional mechanical properties and corrosion resistance; however, casting as commonly used method for HEA fabrication, results in severe compositional segregation. This study demonstrates the potential of laser power bed fusion (LPBF) in overcoming these issues by enabling simultaneous suppression of segregation through supercooling and microstructure control while utilizing time and cost efficient in-situ alloying. A non-equiatomic RHEA with suppressed segregation was designed by optimizing the composition that minimizes ∆T value. This RHEA manufactured through arc melting exhibited a single-phase solid solution with suppressed component segregation despite the slow cooling speed owing to the novel alloy design approach. However, the in-situ alloyed HEA by LPBF achieved single-phase solid solution with suppressed segregation. The effectiveness of in-situ LPBF processed HEA by elemental powder has proven its potential as a next-generation metal material and cost-efficient in-situ alloying process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Process Technology |