| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Exploring Fabrication Pathways, Phase Evolution and Structure-Property Relationships in High Temperature Functionally Graded Material |
| Author(s) |
Brian Jordan, Yousub Lee, James Haley, Ke An, David Collins, Marcus Hansen, Soumya Nag |
| On-Site Speaker (Planned) |
Soumya Nag |
| Abstract Scope |
Synthesizing functionally graded materials (FGMs) require advanced manufacturing techniques, such as additive manufacturing (AM), for precise control of compositional and structural transitions. The current work highlights phase transformations in additively manufactured alloys used at high temperatures and in extreme environments, specifically Ni-based superalloys (IN718) graded to Nb-based refractory alloys (C103), successfully achieved via a third transition alloy to avoid regions of brittle phases. The compositionally graded structures were subjected to detailed mechanical and environmental property evaluation. Thus, ex-situ DIC assisted tensile testing of monolithic and FGM builds were conducted at room temperature from as-built and heat treated specimens. Micro and nanoindentation studies across the graded transition zones were also performed on these specimens to obtain localized microstructure-property relationships. Also, modeling enabled “digital twins” were employed to design pathways for compositional gradation and understand the thermal response on phase/stress evolution of additive builds in a spatio-temporal manner. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Characterization |