About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Elucidating Deformation Mechanisms in Friction-stir Processed Al-7075 Alloy Using In-situ Synchrotron X-ray Diffraction And Ex-situ Electron Backscattered Diffraction Techniques |
Author(s) |
Rakesh R. Kamath, Tingkun Liu, Hrishikesh Das, Piyush Upadhyay, Arun Devaraj, Dileep Singh |
On-Site Speaker (Planned) |
Rakesh R. Kamath |
Abstract Scope |
Friction stir processing (FSP) has been leveraged in recent years to enable local property modifications in lightweight automotive alloys. In this study, tensile samples were extracted from the stir zone and base material regions of an FSP’d Al-7075 plate. In-situ synchrotron x-ray diffraction was performed during the application of tensile strain (5%, 10%, 20%) at beamline 11-ID-C, APS. The diffraction patterns revealed that the constituent phases were Al (matrix) and MgZn2 (precipitates). Single-peak fitting was performed on salient peaks corresponding to both the phases to extract the evolution of peak attributes with increasing tensile deformation. While the peak positions were used to calculate the partitioning of lattice strain between the two phases, the peak width was used to understand the evolution of crystalline size and dislocation density as a function of strain. The detailed x-ray analysis was supplemented with post-mortem EBSD to better understand deformation mechanisms at play. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Characterization, Mechanical Properties |