About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
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Symposium
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6th International Congress on 3D Materials Science (3DMS 2022)
|
Presentation Title |
Visualizing and Analyzing 3D Dislocation Structures in Metals with Dark-field X-ray Microscopy |
Author(s) |
Leora E. Dresselhaus-Marais |
On-Site Speaker (Planned) |
Leora E. Dresselhaus-Marais |
Abstract Scope |
Metals' properties are usually describe via dislocation density, but effects of 3D dislocation structures are often overlooked, as limited characterization methods can resolve 3D defects that span Angstrom to mm lengthscales. Dark Field X-ray Microscopy (DFXM) measures deep subsurface deformations in crystalline materials. My group has developed DFXM approaches to measure dynamics and 3D structures of dislocations across 100-300μm3 regions. This talk will introduce our use of “section-DFXM” to map 3D structures of dislocations - enabled by computer-vision. Reconstructing 4D (x,y,z,φ) scans into 3D maps, we identify hundreds of dislocations using segmentation and classification tools. I will show how annealed single-crystal metals seen by 3D DFXM give new insights into dislocation patterning. Our findings present key opportunities to establish how specific types of microstructural features give rise to the dynamics of dislocation theory. |
Proceedings Inclusion? |
Definite: Other |