About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Local Ordering in Materials and Its Impacts on Mechanical Behaviors, Radiation Damage, and Corrosion
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Presentation Title |
Short-range Structure and Dynamics in Disordered Materials from 4D STEM |
Author(s) |
Shuoyuan Huang, Carter Francis, Paul Voyles |
On-Site Speaker (Planned) |
Paul Voyles |
Abstract Scope |
Spatial mapping of electron nanodiffraction in four-dimensional scanning transmission electron microscopy (STEM) can provide a variety of powerful measures of the short-range structure and its dynamics in disordered materials, all at nanometer to sub-nanometer spatial resolution. In glasses, fluctuation electron microscopy and symmetries in nanodiffraction can probe the local structures involved in crystallization and plasticity, and time-resolved electron correlation microscopy can measure local structural relaxation times. In crystalline materials, pattern matching against a pre-computed dictionary can provide local phase and crystal orientation. For both materials, machine-learning methods can improve identification of “important” diffraction features against the large background of features created by disorder, and lazy data processing approaches can make working with large datasets trackable using only modest computing resources. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Other, |