About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
AI/Data Informatics: Computational Model Development, Validation, and Uncertainty Quantification
|
Presentation Title |
A Statistical Perspective for Predicting Polycrystalline Strength with Machine Learning |
Author(s) |
Yejun Gu, Christopher Stiles, Jaafar El-Awady |
On-Site Speaker (Planned) |
Yejun Gu |
Abstract Scope |
Developing physics-based models that account for material variability is
challenging, particularly in the area of mechanical behavior, where microstructural variations dictate the strength of polycrystalline metals.
However, a combination of machine learning and dislocation dynamics can
predict strength as a function of microstructural features/variations. We
generated a large database of strength (for random sets of microstructural
features), and then applied a combination of the “mixture method” and
neural networks to quantify the relative importance of microstructure
features, and calculate the strength distribution for a given set of microstructural features. The results show excellent agreement with experiments and demonstrate that the conventional Hall-Petch relationship
is a statistically valid manifestation for correlating the strength to the
average grain size. This work provides a new perspective for predicting
polycrystalline strength, while accounting for microstructural variations,
resulting in a tool to guide the design of materials with superior strength. |
Proceedings Inclusion? |
Planned: |
Keywords |
Machine Learning, Computational Materials Science & Engineering, |