About this Abstract |
Meeting |
2021 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 |
Study of the Effect of Grain Boundary Parameters on the Micro Hall-Petch Slope in Mg Alloys |
Author(s) |
Mohsen Taheri Andani, Aaditya Lakshmanan, Veera Sundararaghavan, John Allison, Amit Misra |
On-Site Speaker (Planned) |
Mohsen Taheri Andani |
Abstract Scope |
Theoretical studies have shown that the geometry and structure of grain boundaries (GBs) in metallic materials play a significant role in determining the Hall-Petch slope. However, experimental capabilities to assess the GB strength to validate these studies are still limited. The objective of this work is to utilize a high-resolution electron backscatter diffraction technique coupled with a dislocation pile-up model to estimate the barrier strength of specific GBs to specific slip systems, referred to as the micro Hall-Petch slope. The micro Hall-Petch slopes are then correlated with geometric descriptors of the respective GBs. The results indicate that the angle between the two slip plane traces on the GB plane and the angle between the slip directions are the most sensitive parameters affecting the micro Hall-Petch slope. This research will provide new insights into the understanding of the grain refinement strengthening parameters in the plasticity of Mg alloys. |
Proceedings Inclusion? |
Planned: |