The Effects of Processing Conditions on Mechanical Properties of Inconel 718 Super-alloys Manufactured by Electron Beam Melting

Abstract

Abstract Additive Manufacturing (AM), also known as three-dimensional (3D) printing and rapid prototyping, is the technology of making solid objects by adding material layer by layer based on computer-aided design (CAD). Electron Beam Melting (EBM) technology, which is one of the AM technologies, is based on the principle of melting metal powders by a focused electron beam that provides high energy and temperature and is based on the formation of layers by the repetitive welding technique, which is made by joining one on top of the other. Inconel 718 is the most widely used nickel-based superalloy due to its excellent high temperature strength and good oxidation corrosion resistance up to high temperatures. The main areas of use are discs, shafts, cases, stators, blades, gaskets, supports, pipes and fasteners. The main subject of this thesis study is to investigate the effects of hot isostatic pressing and heat treatment by revealing the mechanical and physical properties of Inconel 718 with experiments to be applied. In this context, tensile test and density values ​​of commercial Inconel 718 samples produced by additive manufacturing, additive manufacturing + heat treatment, additive manufacturing + hot isostatic press + heat treatment were compared.