About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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AI/Data Informatics: Computational Model Development, Validation, and Uncertainty Quantification
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Presentation Title |
Using Polycrystals for Bayesian Inference and Uncertainty Quantification of Grain Boundary Structure-property Models |
Author(s) |
Brandon D Snow, Sterling G Baird, Christian Kurniawan, David T Fullwood, Eric R Homer, Oliver Johnson |
On-Site Speaker (Planned) |
Brandon D Snow |
Abstract Scope |
Bicrystals permit interrogation of the properties of individual grain boundaries (GBs) directly, but can be difficult, time-intensive, or expensive to synthesize experimentally. In contrast, polycrystals are ubiquitous, contain a broad diversity of GB types, and can be more straightforward and inexpensive to produce. We present a Bayesian inference strategy designed to enable the use of homogenized effective property measurements from polycrystals for the construction of grain boundary structure-property models. This strategy involves the solution of an inverse problem (determining the properties of individual GBs from the homogenized properties of polycrystals) and naturally provides uncertainty quantification (UQ) for the resulting GB structure-property models. We compare structure-property models inferred from polycrystals and bicrystals and find that under certain circumstances bicrystal data is preferred, while under other circumstances the use of polycrystal data may be more advantageous. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Machine Learning |