About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Multiphysics Modeling and Multi-Modal Imaging of Functional Materials
|
| Presentation Title |
Phase-Field Modeling Coupled with FFT-Based Crystal Plasticity for Recrystallization Dynamics Driven by Geometrically Necessary Dislocations in Gradient Grained Metals |
| Author(s) |
Lei Chen, Xinxin Yao, Hossein Abbasi |
| On-Site Speaker (Planned) |
Lei Chen |
| Abstract Scope |
Modeling of dislocation-induced plastic deformation recrystallization remains a significant challenge due to the high computational cost and complexity of slip systems. To address this, we developed an integrated approach that combines crystal plasticity (CP) with the phase-field method (PFM) to simulate the recrystallization process. Both the statistically stored dislocation (SSD) and geometrically necessary dislocation (GND) were incorporated into a fast Fourier transform-based (FFT) CP framework to calculate the stress and strain field. These results were then fed into PFM to model recrystallization dynamics and grain growth. Our approach successfully captures the effects of gradient-size and strain rate on the mechanical properties and dislocation distribution. A recrystallization case study demonstrates the approach’s capacity to simulate dislocation-induced plastic deformation. Validation against published stress-strain curves confirms the accuracy of our approach. This study highlights the critical role of GNDs in enhancing the mechanical property of gradient-grained metals. |