About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Characterization: Structural Descriptors, Data-Intensive Techniques, and Uncertainty Quantification
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Presentation Title |
GB Property Localization: Inference and Uncertainty Quantification of Grain Boundary Structure-property Models |
Author(s) |
Oliver Johnson, Brandon Snow, Sterling Baird, Christian Kurniawan, David Fullwood, Eric Homer |
On-Site Speaker (Planned) |
Oliver Johnson |
Abstract Scope |
We have been developing a method for inferring grain boundary (GB) structure-property models from measurements (and/or simulations) made on polycrystals, which we call GB Property Localization. One of the major challenges of developing quantitative structure-property models for GBs is that the quantity of available data is small compared to the size of the GB character space, so that the problem is almost always severely underdetermined (i.e. there are far fewer measurements than the number of discrete “bins” in any reasonable discretization of the space). In this talk we present a new formulation of the GB Property Localization procedure that solves the problem of indeterminacy and enables the inference of continuous functions (as opposed to discretized approximations). We describe the probabilistic framework on which GB Property Localization is built, and how it naturally facilitates Uncertainty Quantification (UQ) for the resulting constitutive models. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |
Keywords |
Advanced Materials, |