About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Functionally graded tungsten–Inconel 718 structures via LPBF: Interfacial bonding, residual stresses, and corrosion performance |
| Author(s) |
Ala Qattawi, Gabriel Awuku Dzukey, Sara Ranjbareslamloo |
| On-Site Speaker (Planned) |
Ala Qattawi |
| Abstract Scope |
In LPBF of refractory-functionally graded materials (FGM), residual stress and defects persist due to rapid thermal cycles. This study demonstrates how the fabrication of multi-powder layers of tungsten and nickel alloys with varying laser power affects the interfacial bonding, residual stress, and hardness. This study elaborates on how these changes are related to energy density. The corrosion resistance of W-IN718 FGM was also studied using electrochemical impedance spectrometry, and the results were compared to those of tungsten heavy alloy (WHA) and to each of the base materials (W and IN718). The results showed good bonding achieved through solid-state diffusion with improved material properties of hardness and successful fabrication of pure W powder with less residual stress and defects usually faced, such as cracks and pores at the interlayers. The FGM structure fabricated using LPBF proved to achieve an improved corrosion performance beyond WHA and W. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, High-Temperature Materials |