Optimization of the Post-Process Heat Treatment of Inconel 718 Superalloy Fabricated by Laser Powder Bed Fusion Process

In the present study, multi-objective optimization is employed to develop optimum heat treatments that can achieve both high-mechanical performance and non-distinctive crystallographic texture of 3D printed Inconel 718 (IN718) fabricated by laser powder bed fusion (LPBF). Heat including homogenization at different soaking times (2, 2.5, 3, 3.5 4 h) 1080 °C, followed a 1 h solution treatment 980 °C standard aging have been employed. 2.5 found be threshold after which there depletion hardening precipitate constituents (Nb Ti) from γ-matrix. However, significant number columnar grains with high fraction (37.8%) low-angle grain boundaries (LAGBs) still retained treatment. After treatment, fully recrystallized IN718 annealing twins (87.1%) obtained. result in tensile properties exceeding those wrought RT 650 °C. considering requirements, it offers used produce components offering balanced combination mechanical adequate microstructural isotropy.