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 |
The Influence of Yttrium Segregation on the Grain Boundary Plasticity of PolycrystallineMg Alloys Using Nanoindentation and In Situ SEM Tensile Testing Combined with HR-EBSD |
Author(s) |
Eunji Song, Amit Misra |
On-Site Speaker (Planned) |
Eunji Song |
Abstract Scope |
High-resolution electron backscatter diffraction (HR-EBSD) is used to characterize geometrically necessary dislocations (GNDs), which, in conjunction with mechanical testing, provided insights into the strain hardening response of single-phase polycrystals. Yttrium is extensively used in Mg alloys because it activates non-basal slip systems and its grain boundary segregation enhances the ductility of polycrystalline Mg alloys. However, characterizing local stresses and dislocation evolution in polycrystals remains challenging, limiting knowledge of how individual grain boundaries influence the mechanical behavior of polycrystalline.
In this study, we investigate deformation responses of grain boundaries in Mg-4Al and Mg-1Y using nanoindentation and in situ tensile testing combined with HR-EBSD. We estimate the activity of non-basal slip systems and correlate them with the characteristics of individual grain boundaries, such as geometric/plastic compatibility and Yttrium segregation. This approach aims to provide an understanding of effects of Yttrium on the grain boundary plasticity and strain hardening response of single-phase polycrystallines. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Magnesium, Characterization |