The aim of this master thesis is articulated into two main objectives: first, to assess the evolution of Inconel 718 powder properties over multiple reuse cycles in the Direct Metal Laser Melting (DMLM) Additive Manufacturing process; and second, to evaluate the influence of different recoater blade materials, hard versus soft, on powder contamination and component quality. This thesis focuses on two primary research goals: the first one is to characterize the progressive changes in Inconel 718 powder properties resulting from multiple reuse cycles in the Direct Metal Laser Melting (DMLM) process; and (2) to examine the impact of recoater blade material selection, comparing hard and soft blades, on powder chemical and morphology integrity and final part quality.