About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Feedstock Processing for Multifunctional Materials
|
| Presentation Title |
Efficient Synthesis of High-Entropy Alloy Via Direct Energy Deposition |
| Author(s) |
Yusufu Ekubaru, Tomoya Uchida, Nakabayashi Takuya |
| On-Site Speaker (Planned) |
Yusufu Ekubaru |
| Abstract Scope |
High-entropy alloys (HEAs) offer exceptional mechanical and functional properties but present significant challenges in composition optimization, particularly for refractory systems with constituent elements that have melting points exceeding 2000°C. Traditional manufacturing routes involve multiple complex processing steps, limiting rapid compositional exploration. We developed a direct energy deposition (DED) system with an additional powder feeder (APF) featuring four independent powder tanks, which enable continuous, programmable mixing of elemental powders during deposition, thereby facilitating high-throughput alloy synthesis. This study demonstrates the system's capabilities through the synthesis of different HEA compositions under varying processing conditions. High-purity elemental powders were mixed in situ while systematically optimizing laser power, scan speed, and powder feed rate. Characterization via XRD, SEM-EDX, and hardness testing revealed a homogeneous single-phase structure with uniform elemental distribution throughout the fabricated specimen. This novel approach significantly expands possibilities for high-throughput exploration of alloy systems previously difficult to synthesize. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Additive Manufacturing |