About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
AI/Data Informatics: Computational Model Development, Verification, Validation, and Uncertainty Quantification
|
Presentation Title |
Advancing Alloy Design: A Parameter-Free Statistical Approach to Predicting Stress Strain Curves of BCC Polycrystals |
Author(s) |
Jing Luo, Yejun Gu, Jaafar El-Awady |
On-Site Speaker (Planned) |
Jing Luo |
Abstract Scope |
Innovations in automated material design demand models that predict both mechanical properties and inherent uncertainties. Traditional deterministic models, reliant on fitting parameters subject to experimental conditions, fall short in addressing these needs. This study introduces a parameter-free statistical methodology tailored for BCC alloys prediction and design. Centered on a data-driven mixed density neural network, our approach uses existing experimental data from traditional alloys to develop a new constitutive rule for the evolution of dislocation density. This methodology allows for predicting the uncertainty in the resulting stress-strain curves and quantifies the relevant microstructures that must be measured experimentally for more of a deterministic prediction. Further, we delve into the origins of uncertainty, identifying and narrowing the gap between experiments and simulations. Our findings highlight potential solutions for bridging experimental-simulation discrepancies and offer a reliable yet efficient path to developing new BCC alloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
ICME, Machine Learning, Computational Materials Science & Engineering |