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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Verification, Calibration, and Validation Approaches in Modeling the Mechanical Performance of Metallic Materials
Presentation Title Porous Crystal Plasticity Modeling of Additively Manufactured Alloy 718 for Fatigue Life Prediction
Author(s) Isabella Snyder, George Weber, Lucas Prata Ferreira, Nolan Strauss, Prajwal Kammardi Arunachala, Somnath Ghosh
On-Site Speaker (Planned) Isabella Snyder
Abstract Scope This work develops a porous crystal plasticity finite element model to predict fatigue life of additively manufactured Alloy 718, a nickel-based super alloy widely used in aerospace applications. This model will be used to determine the impact of microstructural characteristics on material response and fatigue life, which will reduce the need for physical prototypes in developing additively manufactured parts. Electron backscatter diffraction (EBSD) scans are utilized to extract key microstructural parameter distributions, including grain size, shape, and crystallographic orientation, which inform the generation of microstructure-based representative volume elements (M-SERVEs). To capture the influence of microstructural defects, larger voids are explicitly modeled within the M-SERVEs, while smaller voids are represented as a continuous porosity field. The constitutive and porosity parameters are calibrated using experimental data. A Bayesian inference-based probabilistic model is used to predict fatigue crack nucleation and a phase field model is used to simulate short crack growth.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Copper / Nickel / Cobalt, Mechanical Properties

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