About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Evaluating the Precursors of Particle Fracture in Al Alloys Via High-Resolution EBSD |
Author(s) |
Philip Noell, Laura Vietz, William Gilliland, Timothy Ruggles |
On-Site Speaker (Planned) |
Philip Noell |
Abstract Scope |
Ductile rupture usually involves structural degradation from the nucleation and growth of voids and their coalescence into cracks. In many Al alloys, void nucleation is dominated by intermetallic particle cracking. Classically, it is assumed that particles crack when the stress concentration created by dislocation pileups at the particle/matrix interface exceeds a critical
value, but there is little experimental evidence of this. In the current study, a combination of electron backscatter diffraction (EBSD) and high-resolution EBSD (HR-EBSD) were used to characterize dislocation structures around particles and the stress states within particles in two aluminum alloys, Al-6061 and Al-2219. These data provide new insights into the microstructural evolution within the Al matrix and variations in the local stress state that lead to void nucleation. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Aluminum |