About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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AI/Data Informatics: Applications and Uncertainty Quantification at Atomistics and Mesoscales
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Presentation Title |
A Machine Learning Investigation of Crystallographic Parameters for Abnormal Grain Growth |
Author(s) |
Meizhong Lyu, Joseph Pauza, Ryan Cohn, Elizabeth Holm |
On-Site Speaker (Planned) |
Meizhong Lyu |
Abstract Scope |
Abnormal grain growth is characterized by rapid growth of a few grains in polycrystalline materials. Although theoretical growth advantages and mechanisms have been widely studied over the past decades, researchers cannot precisely predict the occurrence of abnormal growth from an initial microstructure. This study aims at sifting the favorable crystallographic parameters for abnormal grain growth by quantitative analysis using data mining and machine learning. Two-dimensional simulations were based on the Monte Carlo Potts model with initial matrix grains varying in boundary mobilities. For candidate grains with an initial size advantage, abnormal grain growth is related to the geometric, topological, and crystallographic neighborhood of the grain. Given the mobility type of particular nearest neighbor grains, the logistic regression classification accuracy can be quite high. Further improvement in accuracy is achieved by introducing information from the second and third nearest neighbors. |
Proceedings Inclusion? |
Planned: |