| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Additive Manufacturing of Refractory Coatings for Ultra-high Temperature Applications: A Study on the Effect of Substate Dilution |
| Author(s) |
Ashlee Gabourel, Poulomi Mukherjee, Nicholas Ury, Samad Firdosy, Douglas Hofman, Atieh Moridi |
| On-Site Speaker (Planned) |
Atieh Moridi |
| Abstract Scope |
With the advancement of high temperature applications in the aerospace and energy sectors, the development of ultra-high temperature materials is a necessity to overcome the physical limitations of the current materials in use. Refractory metal carbides possess excellent mechanical properties at high temperatures, but result in cracking when manufactured using both conventional and additive routes. We explore the use of Direct Energy Deposition for in-situ alloying of Tungsten Carbide with Niobium on a Titanium substrate to 1) suppress solidification cracking by optimizing the concentration of Niobium 2) study the effect of substrate dilution on the microstructure and mechanical properties of WC-Nb system. Results show that, dilution of titanium forms a compositionally graded microstructure with WC-Nb. As distance from the substrate increases, the microstructure transitions to WC-Nb lamellar structures surrounded by Nb-rich regions and demonstrates a Vickers Hardness comparable to that obtained by the rule of mixture. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Composites |