About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
In Tribute to Robert Wagoner: A Pioneer in Metal Forming and Constitutive Modeling
|
| Presentation Title |
G-24: Crystal Plasticity Modeling for As-Printed Ni-Based Superalloys |
| Author(s) |
Hyeongseo Kim, Myoung-Gyu Lee |
| On-Site Speaker (Planned) |
Hyeongseo Kim |
| Abstract Scope |
While additive manufacturing (AM) is expanding the application of nickel-based superalloys, predicting their properties remains challenging due to complex microstructures. This study, therefore, predicts the mechanical properties of a polycrystalline IN939 alloy fabricated by Laser Powder Bed Fusion (L-PBF) using crystal plasticity (CP) modeling. A temperature-dependent model was established by simulating uniaxial tensile loading at 298K and 923K with an activated flow rule, incorporating dislocation density-based hardening and grain boundary refinement as key mechanisms. Microstructural features observed via EBSD and SEM—such as crystal orientation, grain morphology, porosity—were explicitly represented in a representative volume element (RVE). Implemented via the Crystal Plasticity Finite Element Method (CPFEM) in ABAQUS, the model was optimized to predict the mechanical properties of as-printed IN939. Its validity was successfully confirmed using materials produced with different process parameters, showing excellent predictive accuracy across the temperature range. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Modeling and Simulation |