About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Length-Scale Effects on Geometrically Necessary Dislocation Characterization in Aluminum 6016 Using HR-EBSD |
Author(s) |
Sarah Sanderson, Sajjad Izadpanah, Marko Knezevic, Michael Miles, David Fullwood |
On-Site Speaker (Planned) |
Sarah Sanderson |
Abstract Scope |
This study focuses on the effects of length scale in the evolution of geometrically necessary dislocation (GND) populations and their characterization in Aluminum 6016-T4 subjected to multiple strain paths. GND buildup in this material is observed to be dominated by precipitates, with less influence from grain boundaries. The relationship between precipitate dimensions and surrounding GND population characteristics is investigated. Additionally, the character of the local net Burgers vector (NBV) is studied, in relation to the voxel size used. Specifically, the transition of NBV directionality from being determined by the lattice slip-system to being determined by grain and macro-level shear is analyzed. The relevant length scale for high-resolution (HR-) EBSD analysis is considered in relation to this material’s observed substructure size and compared with total dislocation content determined from XRD. A strain-gradient crystal plasticity model, with incorporated precipitate elements, is employed to capture the observed behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Characterization, |