About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Materials Informatics to Accelerate Nuclear Materials Investigation
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Presentation Title |
Scanning-TEM (STEM) 3D Tomography for Quantification of Radiation Damage in Neutron Irradiated 316L Stainless Steel |
Author(s) |
Laura Hawkins, Fei Xu, Mario D Matos, Tiankai Yao, Boopathy Kombaiah, Collin Knight, Yachun Wang |
On-Site Speaker (Planned) |
Laura Hawkins |
Abstract Scope |
Current transmission electron microscopy (TEM) characterization of radiation damage, such as dislocation loops and voids, is based on 2D projections of a 3D thin microstructure. Therefore, TEM-based quantitative knowledge of radiation damage is subject to various assumptions about the defect shape and sample thickness. This study uses automated Scanning-TEM (STEM) tomography to capture and characterize radiation damage in an EBR-II neutron-irradiated AISI 316L stainless steel to high doses. Coupled with machine learning models for 3D voxel segmentation and feature classification, the volume was reconstructed in a 3D space to show size, shape, and spatial distribution of defects. 3D visualization and data analysis provided ~20% more accurate counts of void density and dislocation loop distribution in the sample when compared to the traditional 2D method. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Machine Learning, Nuclear Materials |