About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Metal Matrix Composites: Processing, Additive Manufacturing, and Applications
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| Presentation Title |
Influence of Graphene Reinforcement on Microstructure and High-Temperature Tensile Behavior of Additively Manufactured Inconel 62 |
| Author(s) |
Nabeel Ahmad, Yoosuf N. Picard, Viet Hung Pham, Robert Thompson, Ki-Joong Kim, Congjun Wang, Christopher Matranga, Chantal K. Sudbrack |
| On-Site Speaker (Planned) |
Nabeel Ahmad |
| Abstract Scope |
Graphene-reinforced IN625 (GR-625) specimens were fabricated with laser powder bed fusion with 0.1-0.3% by mass additions of 2D and 3D graphene to investigate their influence on the microstructure and high temperature tensile behavior. Graphene induced grain refinement compared to unmodified IN625, though increasing it from 0.2% to 0.3% wt. did not yield additional refinement. After solutionizing, M23C6 and M6C precipitated along grain boundaries (GBs) and within grains, and their fraction increased with graphene content. Tensile tests at 25 and 650°C showed higher strength and reduced ductility in GR-625 specimens, which was ascribed to finer grains and early void nucleation from carbides. Interestingly, at 760°C, the unmodified IN625 showed the highest strength, as excess carbides in GR-625 weakened GBs and reduced tensile strength. Dynamic strain aging, observed only at 650°C, was suppressed with graphene additions because increased carbide formation acted as sink for interstitial carbon, reducing the solute-dislocation interactions required for |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, |