Akademik Veri Yönetim Sistemi
22. International Metallurgy and Materials Congress 24', İstanbul, Türkiye, 19 - 21 Eylül 2024, ss.235-237, (Tam Metin Bildiri)
Sustainability and high-performance serving alloys have always been demanded features in the aerospace industry for the last decades. Inconel 718 has good mechanical properties and corrosion resistance even at high and cryogenic temperatures. Inconel 718 is used in steam power plants, nuclear reactors, jet and steam engines, petrochemical facilities, and exhaust chambers owing to its advanced properties mentioned above. The desired mechanical properties can only be achieved after proper heat treatments. The austenitic transition phases (γ'-Ni 3 Al and γ''-Ni 3 Nb) and appropriate carbide distribution can be formed on the γ-Ni 3 Ti matrix, by solutioning (above 950°C) followed by a two-step aging (above 620 and 720°C). A prior homogenization (above 1100°C) is also required to prevent the formation of undesirable phases such as δ-Ni 3 Nb. Users at the forefront of the aerospace industry prioritize AM (Additive Manufacturing) techniques as they provide boutique-shaped parts with specific manufacturing parameters. L-PBF (Laser Powder Bed Fusion) is a widely used technique owing to its simple application and low production cost. In the present work, the approved heat treatment conditions were applied to samples of the L-PBF product Inconel 718. The microstructure of as-L-PBF sample was refined. The desired γ-γ'-γ'' formation was provided. The microhardness values were enhanced. The microstructures obtained after various aging conditions were discussed. The microhardness values were related to the microstructure evolution. A novel aging condition (Furnace Controlled Aging-FCA) was developed as a rival to the CA (Conventionally Aging) of Inconel 718.