About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Nanomechanical Responses and Deformation Mechanisms of Pure Magnesium Via Nanoindentation |
Author(s) |
Kelvin Yu Xuan Xie, Yi-Cheng Lai, Reza Motallebi, Jiaqi Dong, Raj Patel |
On-Site Speaker (Planned) |
Kelvin Yu Xuan Xie |
Abstract Scope |
In this study, we conducted nanoindentation tests on Mg crystals oriented along various crystallographic directions. We observed that the hardness decreases with an increase in the c-axis declination angle (the angle between the indentation direction and the crystal's c-axis) up to approximately 55 degrees, before increasing again. This behavior captures the plastic anisotropy patterns observed in single-crystal compression experiments. Using confocal microscopy, cross-sectional Electron Backscatter Diffraction (EBSD), and Transmission Electron Microscopy (TEM), we identified that the deformation within the volumes predominantly progresses from <c+a> dislocations to basal <a> dislocations, and ultimately to extension twinning as the declination angle increases from 0 to 90 degrees. These findings indicate that, despite the differences in stress states compared to single-crystal compression, nanoindentation can effectively capture key aspects of mechanical behavior and the primary deformation mechanisms in metal crystals. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Characterization, Mechanical Properties |