Thermochemical modelling and directed energy deposition of copper-nickel functionally gradient materials

Official URL: https://risc01.sabanciuniv.edu/record=b2708516_(Table of contents)

In recent years, advances in metal alloys and composite materials have improved the properties of constituent Materials and their homogenous properties throughout the structures. However, in certain critical applications in aerospace, military and nuclear industries, different functionalities and material properties are needed at different locations of the part. Multi-material structurers can provide massive heat conduction, wear resistance, corrosion and oxidation resistance properties provide by these several materials together. However, manufacturing such structures is still challenging. Although, traditional manufacturing methods are already used to produce multi-material structures, components often fail because of the dissimilarity between the different materials and not being able to control the material gradient and composition. Recently, additive manufacturing (AM) was recognized as a promising technique to control the manufacturing process and fabricate functionally graded materials (FGM). Because of that, In this research, development of a CuSn10-In718 functionally gradient material by using directed energy deposition (DED) additive manufacturing process is investigated. The relation between process parameters and their corresponding material properties are analyzed for obtaining optimum process parameters. Furthermore, a thermochemical computational modeling was used to determine the viability of the FGM structure fabricated by DED technique. Microstructural and elemental composition investigation has been done by using scanning electron microscopy (SEM), back scattered electron detector (BSE), x-ray diffractometer (XRD) and energy dispersive spectroscopy (EDS).