About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
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Presentation Title |
Three-dimensional Dislocation Characterization during In-situ Straining TEM |
Author(s) |
Benjamin P. Eftink, Stuart Maloy |
On-Site Speaker (Planned) |
Benjamin P. Eftink |
Abstract Scope |
Revealing the three-dimensional information of dislocations from TEM experiments using conventional methods requires a large amount of input data acquired with the same diffraction conditions. Combining the three-dimensional spatial characterization with in situ straining TEM experiments is particularly difficult because of maintaining the same diffraction condition with a single tilt axis sample stage. That lack of three-dimensional characterization during deformation leaves out key aspects of the deformation process including dislocation character and slip plane which are both important to how dislocations are predicted to glide, climb and interact with other defects. Using a recently developed stereo-tomography approach, extracting three-dimensional spatial and crystallographic information requires minimal data inputs and can be efficiently combined with in-situ TEM experiments. Only two TEM images, that can be in different diffraction conditions, are needed to create the three-dimensional spatial models. The technique is computationally simple and easily executed with open source software Obtain3D_open. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, |