| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond V
|
| Presentation Title |
Additive Manufacturing Feasibility of Refractory High Entropy Alloys |
| Author(s) |
Abdulquadri Tobi Oriola, Anh Nguyen, Ugochukwu Ochieze, Sravya Josyula, Hung Do, Josh Maile, Aaron Mcmillen, William Voellmecke, Eric J. Payton |
| On-Site Speaker (Planned) |
Abdulquadri Tobi Oriola |
| Abstract Scope |
Refractory high entropy alloys (RHEAs) have received significant attention for their remarkable strength at very high temperatures making these alloys interesting for extreme environment applications. However, conventional thermomechanical processing remains extremely challenging. Researchers have proposed additive manufacturing as a potential solution for taking advantage of RHEA properties. This paper investigates screening metrics through which the additive manufacturability of RHEAs can be assessed, with focus on laser powder bed fusion. Crack susceptibility criteria are calculated using calculation of phase diagrams (CALPHAD) approach. Solidification predictions are used to predict possible phases, alloy compositions, and freezing-ranges for database of alloys published in literature. Cracking susceptibility differences and melt pool behavior are quantified and compared for key arc-melted alloy pairs, the correlation between crack propagation and microstructure are analyzed using scanning electron microscopy, electron backscatter diffraction, and energy dispersive spectroscopy. An assessment of prospects for additive manufacturing processability prediction for RHEAs will be presented. |