About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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AI/Data Informatics: Computational Model Development, Verification, Validation, and Uncertainty Quantification
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Presentation Title |
Finding “Trigger Sites” of Reactions Among Heterogeneous Materials From X-ray Microscopic Big Data Using Persistent Homology |
Author(s) |
Masao Kimura, Ippei Obayashi, Daiki Kido, Yasuhiro Niwa, Xichan Gao, Kazuto Akagi |
On-Site Speaker (Planned) |
Masao Kimura |
Abstract Scope |
Material properties are often determined by specific features in heterogeneity (or ‘trigger sites’) of phases, chemical states, etc. We have investigated trigger sites in structural materials, batteries, etc. using X-ray microscopy (XRM) at multiscale. However, finding trigger sites by humans or computers has been a challenging task because the data is not only big but also multi-dimensional. Here we developed a new approach for determining trigger sites in terms of the shapes of heterogeneity in XRM data using persistent homology (PH) analysis. We will present two typical results: (1) finding the trigger sites of heterogeneous reduction of iron ore sinters: the complex of Ca-Fe-O oxides and pores, and (2) finding the crack initiation sites at nanoscale in carbon-fiber reinforced plastics (CFRP) under load. We could non-empirically identify the trigger sites from the big data obtained by XRM. This approach can be applied to find trigger sites in various materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Iron and Steel, Composites |