About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Exploring Void Initiation in Structural Alloys with Advanced EBSD Techniques |
| Author(s) |
Thomas J. Bennett, Philip Noell, Timothy Ruggles, Laura Vietz, William Gilliland |
| On-Site Speaker (Planned) |
Thomas J. Bennett |
| Abstract Scope |
Void initiation at hard second-phase particles is a critical ductile failure process in structural metals and alloys. The two primary modes of void initiation are (1) decohesion at particle-matrix interfaces and (2) particle fracture. Despite extensive literature on this topic, the specific micromechanical mechanisms behind these modes remain unclear. To address this, advanced electron backscatter diffraction (EBSD) techniques are applied to characterize regions around incipient voids in structural alloys, like Al alloy 2219, deformed under tension. Spherical harmonic transform indexing is applied to resolve lattice orientations in plastically deformed areas where Hough indexing encounters difficulty. Relative lattice strains within diffracting particles are measured using cross-correlation high-resolution EBSD. This work discusses challenges specific to these applications of EBSD and the implications of our findings for existing void initiation theories. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Aluminum, Other |