| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
|
| Presentation Title |
Achieving Excellent Mechanical Properties and Unique Phase Transformation in High-Entropy Alloys Via Additive Manufacturing |
| Author(s) |
Haiming Wen, Matthew Luebbe |
| On-Site Speaker (Planned) |
Haiming Wen |
| Abstract Scope |
High-entropy alloys (HEAs) are a new class of alloys with great potential for extreme environment applications. A precipitation-strengthened HEA, (Fe0.3Ni0.3Mn0.3Cr0.1)88Ti4Al8, was developed and produced via conventional manufacturing with high strength but low ductility, due to an extensive network of brittle intermetallics that formed after prolonged artificial aging. As additive manufacturing (AM) can often drastically change the microstructure and properties of alloys, this HEA was also printed using laser powder bed fusion. Results indicated that excellent tensile properties were achieved using AM, owing to the unique thermal history and accordingly phase transformation during AM, enabling desirable microstructure, which was characterized using advanced techniques. The as-printed samples showed fine grain sizes and a high dislocation density. In addition, multiple passes during the printing induced intermetallic precipitates, which did not form a brittle network. The printed samples also exhibited unique precipitation behavior and kinetics during artificial aging, compared to conventionally manufactured counterpart. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, High-Entropy Alloys |