High Temperature Deformation and Diffusion Brazing of INCONEL 718 Sheet

Abstract:

Superplastic forming has been known for the ideal process for manufacturing complex parts. Also, diffusion bonding can give a higher design flexibility, which allows a better performance with a lower overall manufacturing cost. Fine grained INCONEL 718 alloy sheet has been known to show superplastic behavior with the combination of high strength and corrosion resistance at the elevated temperatures. In the present study, high temperature deformation characteristic of INCONEL 718 sheet with 15m was investigated firstly. Then, blow forming process with cylindrical cavity was tried. Also, best diffusion brazing and bonding condition was tried to be defined in terms of temperature, pressure and time. Bonding strength was characterized by using lap shear type test and interface observation. Characteristics of deformation and diffusion bonding at high temperature were influenced greatly with grain size while Nb precipitate also played an important role.

• Periodical: Key Engineering Materials (Volumes 622-623)
• Pages: 508-513
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.622-623.508
• Online since: September 2014
• Authors: Yong Nam Kwon*, S.S. Hong, H.G. Kim
• Keywords: Blow Forming, Diffusion Bonding, Diffusion Brazing, Inconel 718

References

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