| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
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| Symposium
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Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales III
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| Presentation Title |
An Investigation of the Effect of Grain Boundary Parameters on the Slip System Level Hall-petch Coefficient for Basal and Prismatic Slip Systems in Mg-4Al |
| Author(s) |
Mohsen Taheri Andani, Aaditya Lakshmanan, Veera Sundararaghavan, John Allison, Amit Misra |
| On-Site Speaker (Planned) |
Mohsen Taheri Andani |
| Abstract Scope |
Grain size strengthening, referred to more commonly as Hall-Petch effect, is a common strategy to improve the yield strength of alloys. This effect arises from grain boundaries (GBs) resistance to plastic deformation by inhibiting slip transfer across adjacent grains. This work aims to utilize a high-resolution electron backscatter diffraction technique coupled with a continuum dislocation pile-up model to quantify the barrier strength of specific GBs to basal and prismatic slip in Mg-4Al. We characterize this barrier strength by studying the dependence of basal/prismatic slip system-level Hall-Petch coefficients on some crystallographic metrics motivated by slip transmission criteria. Our results indicate that the angle between the two slip plane traces on the GB plane and the angle between the slip directions are most correlated to the basal/prismatic slip system level Hall-Petch coefficients. This study provides insights into the understanding of the role of GBs in the plasticity of Magnesium alloys. |