About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Symposium
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2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Presentation Title |
Fabrication of Bimetallic Thin Wall Combustor Liners via Multi-Axial Wire Laser Directed Energy Deposition |
| Author(s) |
Mithilesh Singh, Gurminder Singh, Sushil Kumar Mishra |
| On-Site Speaker (Planned) |
Mithilesh Singh |
| Abstract Scope |
Design of advanced combustors is driven by sever thermal gradients, aggressive oxidation, and cyclic thermo-mechanical loading. The strong radial and axial temperature gradient in combustor liner necessitate spatially tailored material specific to the surrounding environment, making them ideal candidates for the bimetallic architecture. Multi-axial, multi-material Laser-Directed Energy Deposition(LDED) enables flexibility in design and fabrication of multi-material thin-walled liners. Despite advantages, realization of bimetallic combustors via L-DED remains challenging due to thermophysical mismatch, interfacial instability, and microstructural heterogeneity across dissimilar alloys. This study focus on the fabrication technique for bi-metallic liner using Inconl718 and SS17-4 PH. 4D X-ray microscopy was used to characterize the marked improvement in the interlocking and intermixing with elemental diffusion at interface due to change in deposition strategy. Transvers section of the interface was verified with Energy-Dispersive Spectroscopy(EDS) for elemental diffusion across the interface. Thermal fatigue testing was conducted to validate the design of the fabricated liners. |
| Proceedings Inclusion? |
Undecided |