This thesis deals with the study of the Ni-based superalloys Inconel 939 (IN939) processed by Laser Powder Bed Fusion (LPBF). This is an Additive Manufacturing (AM) process that allows obtaining the final components by a layer-by-layer process, using a 3D model. This process is useful to obtain components with complex geometry in a single process, reducing costs, time and obtain parts with a lower weight than traditional technologies. IN939 is a Ni-based superalloy particularly suitable for applications at high temperatures and it can be a good candidate for aeronautical turbine blades. IN939 has excellent mechanical characteristics and resistance to corrosion and oxidation at high temperatures, keeping its microstructure stability up to around 850 °C.