About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture
|
| Presentation Title |
Modeling Fatigue Short Crack Propagation in Polycrystalline Microstructures of Additively Manufactured Alloys Using Coupled Crystal Plasticity-Phase Field Model |
| Author(s) |
Prajwal Arunachala, Nolan Strauss, Lucas Prata Ferreira, Isabella Snyder, Somnath Ghosh |
| On-Site Speaker (Planned) |
Prajwal Arunachala |
| Abstract Scope |
Fatigue life of additively manufactured polycrystalline metallic materials, like titanium and nickel-based alloys, is governed by the nucleation and growth of short cracks in the microstructure. Simulating fatigue short crack propagation across heterogeneous polycrystalline microstructures with varying properties under cyclic loading poses significant computational challenges. Accurate modeling requires incorporating key microstructural features like crystallographic properties, defect structure, and dislocation characteristics. To address these challenges, this study presents a coupled computational modeling framework that integrates a microstructural image-based crystal plasticity formulation with a phase field fracture approach and a wavelet-based multi-time scaling method. The framework incorporates tension-compression asymmetry and the grain structure-dependent anisotropy on the short crack growth behavior. The model is validated through numerical simulations on statistically equivalent representative volume elements (SERVEs) reconstructed from experimental microstructures using electron back-scattered diffraction (EBSD) data. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Other, |