|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Estimation of Micro-Hall-Petch Coefficients in Mg-4Al as a Function of Grain Boundary Parameters
||Mohsen Taheri Andani, Aaditya Lakshmanan , Yung Suk Jeremy Yoo, Veera Sundararaghavan, John Allison, Amit Misra
|On-Site Speaker (Planned)
||Mohsen Taheri Andani
Theoretical works have reported that the grain boundaries (GBs) parameters play a significant role in determining the Hall-Petch in metallic materials. However, experimental measurements to validate these studies are still limited. In this study, a high-resolution electron backscatter diffraction technique coupled with a dislocation pile-up model is utilized to quantify the barrier strength of specific GBs to basal/prismatic slip systems, referred to as the basal/prismatic micro Hall-Petch slope, in Mg-4Al. The micro Hall-Petch slopes are then correlated with GBs parameters, and 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 work will provide new insights into the understanding of the texture and grain size in the plasticity of Mg alloys.