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http://dx.doi.org/10.4150/KPMI.2021.28.5.417

Joint Properties of Inconel 718 Additive Manufactured on Ti-6Al-4V by FGM method  

Park, Chan Woong (Department of Materials Science & Engineering, Hanbat National University)
Park, Jin Woong (Department of Materials Science & Engineering, Hanbat National University)
Jung, Ki Chae (Department of Materials Science & Engineering, Hanbat National University)
Lee, Se-Hwan (Agency for Defense Development)
Kim, Sung-Hoon (Nambu University)
Kim, Jeoung Han (Department of Materials Science & Engineering, Hanbat National University)
Publication Information
Journal of Powder Materials / v.28, no.5, 2021 , pp. 417-422 More about this Journal
Abstract
In the present work, Inconel 718 alloy is additively manufactured on the Ti-6Al-4V alloy, and a functionally graded material is built between Inconel 718 and Ti-6Al-4V alloys. The vanadium interlayer is applied to prevent the formation of detrimental intermetallic compounds between Ti-6Al-4V and Inconel 718 by direct joining. The additive manufacturing of Inconel 718 alloy is performed by changing the laser power and scan speed. The microstructures of the joint interface are characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and micro X-ray diffraction. Additive manufacturing is successfully performed by changing the energy input. The micro Vickers hardness of the additive manufactured Inconel 718 dramatically increased owing to the presence of the Cr-oxide phase, which is formed by the difference in energy input.
Keywords
Ti-6Al-4V; Inconel 718; Dissimilar Joining; Directed Energy Deposition (DED); Functionally Graded Materials (FGMs);
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