About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
G-88: Alloy Design and Microstructure-Property Relationships for Non-Equiatomic Ti-Zr-Nb-Ta-V-Cr Alloys with Tensile Ductility Made By Laser Powder Bed Fusion |
| Author(s) |
Dillon Jobes, Daniel Rubio-Ejchel, Lucero Lopez, William Jenkins, Christopher Tandoc, Jacob Hochhalter, Amit Misra, Liang Qi, Yong-Jie Hu, Jerard V Gordon |
| On-Site Speaker (Planned) |
Dillon Jobes |
| Abstract Scope |
Single-phase body-centered cubic refractory complex concentrated alloys (RCCAs), have the potential to succeed Ni-based superalloys as the next generation of materials for high strength, high temperature applications. However, a lack of room temperature tensile ductility, resulting in a susceptibility to cracking and premature mechanical failure, and the impracticality of manufacturing these strong high-temperature alloys, has hindered the application of these novel materials. This study designs RCCAs with tensile ductility amenable to laser-based additive manufacturing (AM) through density functional theory (DFT) screening to identify lower brittle-to-ductile-transition temperatures and Scheil solidification modeling to down-select for compositions with minimal micro-segregation and a resistance to hot-cracking. These alloys are evaluated for rapid solidification defect formation using in-situ synchrotron melt pool imaging, laser powder bed fusion (L-PBF) AM fabrication, and mechanical testing. While printing defects were observed, tensile yield strengths exceeding 800 MPa and failure strains >5% were achieved, showing promise for these techniques. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, High-Temperature Materials |