| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spatially Tailored Materials: Processing-Structure-Properties
|
| Presentation Title |
Mechanical and Material Characterization of BP-DED Ti-Nb-Cu Functionally Graded Materials |
| Author(s) |
Michael Lester, Daniel Rubio-Ejchel, Teresa Valenzuela, Jun Fan, Wenda Tan, Jerard Gordon, William LePage |
| On-Site Speaker (Planned) |
Michael Lester |
| Abstract Scope |
This work presents mechanical and material characterizations of Ti-Nb-Cu functionally graded materials (FGMs) fabricated by blown-powder directed energy deposition. This FGM system has potential applications in propulsion, where high thermal conductivity (Cu) is needed at inner walls, and high strength-to-weight ratios (Ti) at external walls, where Nb is used as an interlayer between Cu and Ti. This research focuses on advanced characterization of Ti-Nb-Cu FGMs, including porosity mapping, Vickers and Knoop hardness, composition via energy dispersive x-ray spectroscopy (EDXS), and phase grain morphologies using electron backscatter diffraction (EBSD). Mechanical tests were performed using SS-2E micro-tensile specimens cut across a Ti-Nb-Cu gradient and from pure Nb and Ti DED builds. Nb and Ti showed high strain to failure, failing at 31% and 26%, respectively, while the Ti-Nb-Cu gradient failed at 5% in high-porosity Cu regions. Upcoming research will expand on mechanical performance and introduce thermal conductivity measurements and creep performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Characterization |