About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Understanding the Feasibility of Using NiTi55 Interlayer for Ti6Al4V-18Ni Maraging Steel Multi-Metal Deposition in L-PBF |
Author(s) |
Vinay Kenny, Salil Bapat, Ajay P. Malshe |
On-Site Speaker (Planned) |
Vinay Kenny |
Abstract Scope |
This research is focused on understanding the feasibility of using NiTi55 interlayer for achieving interfacial integrity in the multi-metal deposition of Ti6Al4V (Ti64)-18Ni maraging steel (18NiMS) using laser-assisted powder bed fusion (L-PBF). Achieving proper interfacial integrity in multi-metal systems is a significant challenge, particularly with materials having limited chemical compatibility, such as Ti64 and 18NiMS. Test structures were manufactured by printing Ti64 onto an additively manufactured 18NiMS base pad with and without NiTi55 interlayer. The SEM/EDS analysis revealed that the addition of the interlayer resulted in reduced defect density in the interfacial zone. XRD analysis confirmed the favorable change in intermetallic phases at the multi-metal interface, while microstructural characterization revealed the effect of thermal conductivities on grain size evolution. These results demonstrated the potential for using NiTi55 interlayer chemistry to improve interfacial integrity in the Ti64-18NiMS system towards further process parameter optimization for potential applications such as lightweighting. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |