| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Improved Properties of Additively Prepared Inconel 718 Alloy Post-Processed With a New Heat Treatment |
| Author(s) |
Sumit Choudhary, Vidit Gaur |
| On-Site Speaker (Planned) |
Sumit Choudhary |
| Abstract Scope |
In this study, an alternative heat-treatment route (NHT: solution treatment at 1130℃ for 2hr followed by water cooling (WC) and the artificial aging at 730℃ for 13hr followed by furnace cooling (FC)) was studied to optimize the mechanical as well as the fatigue properties of Ni-based 718 alloy fabricated using Laser-Powder Bed Fusion technique. It was found that the NHT parameters enhanced the mechanical properties and the fatigue properties compared to the standard heat-treatment condition. The NHT condition resulted in a more homogenized and recrystallized microstructure with a higher volume fraction of γ′ and γ′′ precipitates, high-angle coincidence site lattice (CSL) as well as the twin boundaries and marginally reduced grain size. The microhardness, tensile strength, and fatigue strength after the NHT condition were improved by ~15%, ~16%, and ~12.5%, respectively, and it was mainly accredited to the high volume fraction of fine strengthening precipitates and homogenized microstructure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Powder Materials |