About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
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The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
Lab-HEDM: A Laboratory-Scale Breakthrough Technique for 3D Characterization of Polycrystalline Materials |
Author(s) |
Seunghee Oh, Yuefeng Jin, Sangwon Lee, Wenxi Li, Ashley Bucsek |
On-Site Speaker (Planned) |
Seunghee Oh |
Abstract Scope |
High-energy diffraction microscopy (HEDM) is a 3D x-ray diffraction technique used to characterize the volume, position, orientation, and strain of thousands of grains concurrently, making it a powerful tool for studying the micromechanical behavior of bulk polycrystalline materials. However, HEDM remains accessible only at a few synchrotron facilities. Here, we introduce an innovative laboratory-scale version (Lab-HEDM) that employs a liquid-metal jet x-ray source. As a validation study, we benchmark the capabilities of Lab-HEDM against synchrotron-based HEDM and laboratory diffraction contrast tomography (Lab-DCT). Over 96% of grains detected by Lab-3DXRD were cross-validated with Lab-DCT and/or synchrotron-3DXRD, especially for coarse grains (> ~64 μm). Results also suggest that finer grains could be resolved by employing high-efficiency detectors (e.g., photon-counting detectors). Additionally, we demonstrate how the sensitivity of Lab-3DXRD to fine grains can be improved by modifying the HEDM reconstruction procedure. |
Proceedings Inclusion? |
Undecided |