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Meeting 2027 TMS Annual Meeting & Exhibition
Symposium Verification, Calibration, and Validation Approaches for Mechanical Modeling of Metals
Presentation Title Modeling the Deformation Behavior in Additively Manufactured 718 with Explicit Intragranular γ - γ' - γ'' Delineation
Author(s) Isabella Snyder, Noah Schmelzer, Jake Benzing, George Weber, Hasan Jame, S. Mohadeseh Taheri-Mousavi, Sneha Prabha Narra, Somnath Ghosh
On-Site Speaker (Planned) Isabella Snyder
Abstract Scope Additively manufactured 718 is a high-performance aerospace superalloy with the ability to retain high strength at elevated temperatures. Unlike many superalloys, which are strengthened primarily by ordered L12 γ' precipitates, 718 derives its dominant strengthening from coherent D022 γ'' precipitates. This work develops a multiscale crystal plasticity model for nickel-based superalloys incorporating the effects of intragranular γ' strengthening and γ'' resistance mechanism. The model incorporates precipitate characteristics through functional forms of crystal plasticity parameters in terms of the γ' - γ'' morphologies . Experimental 718 samples are fabricated by laser powder bed fusion and subjected to multiple post-processing conditions. The microstructure is characterized at the grain and sub-grain scales and used as input to the multiscale crystal plasticity simulations. The model is calibrated and validated against monotonic tensile tests and captures the influence of variations in intragranular precipitate characteristics on the mechanical response.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Copper / Nickel / Cobalt, Modeling and Simulation

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