About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-69: A Multiscale Crystal Plasticity Phase Field Model for Fatigue Analysis in LPBF AM Ni-Based Superalloys |
| Author(s) |
Isabella Snyder, Prajwal Kammardi Arunachala, Noah Schmelzer, Somnath Ghosh |
| On-Site Speaker (Planned) |
Isabella Snyder |
| Abstract Scope |
Ni-based superalloys are a class of high-performance materials that retain high strength at elevated temperatures, making them valuable for aerospace applications. Laser power bed fusion (LPBF) additively manufactured (AM) Ni-based superalloys are of particular interest due to their ability to enable efficient fabrication of complex components. However, robust predictive models for fatigue in these materials remain limited. This work presents a multiscale modeling framework that incorporates γ, γ', and γ'' phases within grain-scale crystal plasticity constitutive laws, allowing intragranular effects to be captured while remaining computationally tractable. Microstructure-based statistically equivalent representative volume elements are generated from electron backscatter diffraction (EBSD) scans to represent experimental microstructures. Single crystal simulations are used to calibrate cross-slip resistance parameters, while the remaining crystal plasticity parameters are calibrated using polycrystalline stress-strain data. A phase field model is employed to investigate the effects of defect size and microstructure on short crack nucleation and propagation. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, Modeling and Simulation, High-Temperature Materials |