About this Abstract |
Meeting |
2021 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 |
Impact of Precipitate Size, Orientation, and Temperature on Strain Hardening Behavior in Al-Cu Alloys |
Author(s) |
Brian K. Milligan, Dong Ma, Lawrence Allard, Amit Shyam, Amy Clarke |
On-Site Speaker (Planned) |
Brian K. Milligan |
Abstract Scope |
Recent advances in Al-Cu alloy development have once again put a spotlight on their strain hardening behavior. This study observes strain hardening behavior in both the precipitate and matrix phases as a function of their orientation (with multiple aging conditions and testing temperatures applied) via in-situ neutron diffraction. This technique allows for the study of load transfer from the matrix phase to the precipitate phase, which was used to identify precipitate bypass mechanisms and, by extension, strain hardening mechanisms. Load transfer was found to be highly anisotropic for plate-shaped θ′ precipitates, which mitigated load transfer by rotating instead of deforming elastically. A new phenomenological model was developed which allows for the prediction of stresses in both the matrix and θ′ precipitate phases from bulk stress-strain curves. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Aluminum, Characterization |