| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Three-dimensional Surface Morphology Reconstruction for In-situ Scanning Electron Microscope Experiments: An Alternative to Digital Image Correlation (DIC) |
| Author(s) |
Khalid El-Awady, Steven Lavenstein, Jaafar A. El-Awady |
| On-Site Speaker (Planned) |
Jaafar A. El-Awady |
| Abstract Scope |
We develop a new frameworkd for reconstructing 3D models of the surface of a material undergoing in situ scanning electron microscope deformation. Specifically we reconstruct the evolving 3D surface morphology (out-of-plane intrusions and extrusions) and lateral (in-plane) motion from multiple views of the sample at the end of the experiment, combined with a reverse optical flow propagation backwards in time that utilizes interim single view images. These measurements can be subsequently mapped to the strain tensor of all surface points, which can lead to better understanding of slip localization. This approach offers an alternative to the commonly used digital image correlation (DIC) technique which relies on tracking a speckle pattern applied to the material surface. DIC based on single camera input only produces in-plane two-dimensional (2D) measurements whereas our approach enables reconstruction of the 3D surface morphology and is completely non-invasive (requires no pattern being applied to the material surface). |
| Proceedings Inclusion? |
Planned: |