About this Abstract |
Meeting |
2025 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 |
Evolution of Internal Strain During Cyclic Deformation of Aluminum Studied by High-Resolution Reciprocal Space Mapping and Large-Strain Elasto-Viscoplastic Fast Fourier Transformation Simulation |
Author(s) |
Thomas Kohne, Miroslav Zecevic, Zoltan Hegedues, Ulrich Lienert, Ricardo Lebensohn, Wolfgang Pantleon |
On-Site Speaker (Planned) |
Thomas Kohne |
Abstract Scope |
Cyclic deformation of aluminum AA1050 leads to the formation of ordered dislocation structures. These structures consist of soft dislocation-free subgrains and hard dislocation walls with high dislocation density resulting in internal strains as described by the revised composite model. The evolution of internal strains during symmetric tension and compression cyclic deformation is monitored in situ by high-resolution reciprocal space mapping using high-energy X-ray diffraction. For several individual grains, the largest internal strain is observed close to the onset of reverse yielding and does not coincide with the maximum macroscopic strain. Additionally, the large-strain elasto-viscoplastic fast Fourier transformation (LS-EVPFFT) approach is used to simulate the evolution of internal strains during cycling to better understand the underlying mechanisms. The combination of experimental results with LS-EVPFFT simulation provides new insights into the development of internal strains during cyclic deformation that will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Modeling and Simulation |