About this Abstract |
Meeting |
2026 TMS Annual Meeting & Exhibition
|
Symposium
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AI/ML/Data Informatics for Materials Discovery: Bridging Experiment, Theory, and Modeling
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Presentation Title |
Predicting Dislocation Density Evolution via Machine Learned Symbolic Regression |
Author(s) |
Jing Luo, Jaafar El-Awady |
On-Site Speaker (Planned) |
Jing Luo |
Abstract Scope |
Designing high-strength alloys requires accurate prediction of plastic deformation, which is fundamentally controlled by the evolution of dislocation structures. At the continuum scale, dislocation density is a key internal variable governing mechanical behavior. However, traditional deterministic models rely on fitted parameters that are highly sensitive to experimental conditions, limiting their generalizability and utility in alloy design. In this work, we present a probabilistic approach trained on literature data to predict the evolution of dislocation density across a range of microstructural features. We utilize this model to generate a synthetic dataset encompassing relevant physical regimes and apply symbolic regression to derive an explicit, interpretable expression that links dislocation density to microstructural features and applied strain. The resulting formula enables the fast and accurate prediction of dislocation density. It can be seamlessly integrated into multiscale frameworks, such as crystal plasticity simulations, offering a powerful tool for data-driven alloy design. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, ICME, Mechanical Properties |