Post-Processing of Cold Sprayed CoNiCrAlY Coatings on Inconel 718 by Rapid Induction Heating

Cold spray is a solid-state additive manufacturing process that has been increasingly used for restoration of damaged parts. Due to the nature powder bonding, cold coatings usually possess pores in microstructures. Heat treatment widely as post-processing method reduce porosity sprayed coatings. However, it requires whole component be treated furnace and typically takes few hours finish treatment. This study aims develop localized rapid Multi-layer CoNiCrAlY on an Inconel 718 substrate were produced. Then heat at 800 °C, 900 1000 °C 1100 by induction heating. The level reduced significantly after heating short period merely 10 min. attributed preferential Joule pore regions, which results closures within potential application demonstrated this work.