Experimental investigation and numerical simulation of synthesis carbides in Inconel 718/CFs/316L composite obtained by direct energy deposition

Direct energy deposition was used to obtain the carbides M_xC_y in carbon-fibers-reinforced Fe–Ni matrix composites. The direct energy deposition method has been proposed to deposit 316L stainless steel on carbon fibers and Inconel 718 substrate. Carbon fiber is the source of block-like Cr₇C₃ carbide, which is the basis for growing Cr₂₃C₆ carbide with a developed morphology. The carbides of the Cr₂₃C₆ type at the microstructure of the carbon-fibers-reinforced stainless steel 316L specimen, obtained by direct energy deposition on Inconel 718 substrate, (Inconel 718/CFs/316L) were investigated. The formation of globular carbides can be achieved by heating at 1000 °C for 4 h, cooling in a furnace for 10 h, and quenching. The polycrystalline structure of the Cr₂₃C₆ carbides obtained by direct energy deposition is present. A numerical simulation was used to describe the process of modifying the morphology, assumed strain, thermal strain, thermal history and microstructure of Cr₂₃C₆ carbides obtained by DED during heat treatment of Inconel 718/CFs/316L.