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 |
Investigation of Grain Boundary Effect on the Strain Hardening of Mg-4Al by In Situ Tensile Testing in SEM and High Resolution EBSD |
Author(s) |
Eunji Song, Mohsen Taheri Andani, Amit Misra |
On-Site Speaker (Planned) |
Eunji Song |
Abstract Scope |
A combination of in situ tensile testing in a scanning electron microscope (SEM) and high-resolution electron backscatter diffraction (EBSD) were used to characterize the evolution of geometrically necessary dislocations (GNDs) at grain boundaries with increasing applied strain in a single-phase Mg-4Al alloy. Tensile tests were performed up to a total strain of 5.7% on the Mg-4Al alloy with an average grain size of 55 µm. Density of GNDs was measured at plastic strains of 0%, 1.5%, 3%, and 4.3%, and the increase in GND density was correlated with the deformation incompatibility between adjoining grains represented by the difference in Schmid factors and the angular mismatch between active slip systems. The experimental results are used to analyze the strain hardening measured in tensile tests on polycrystalline samples in terms of GNDs and related to grain size and the geometric mismatch across grain boundary. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Mechanical Properties, Characterization |