| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Agile Additive Manufacturing by Employing Breakthrough Functionalities
|
| Presentation Title |
Understanding Structure-property Relationships in High Temperature Functionally Graded Material |
| Author(s) |
Marcus Hansen, David Collins, James Haley, Brian Jordan, Yousub Lee, Soumya Nag |
| On-Site Speaker (Planned) |
Marcus Hansen |
| 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 and deformation mechanisms 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. Finally, preliminary isothermal oxidation studies at temperatures >900C were conducted to evaluate oxide thickness and chemistry as a function of site-specific composition. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |