About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
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Presentation Title |
G-3: Energetics and Mechanisms of Slip-Grain Boundary Interaction in Magnesium and Its Alloys |
Author(s) |
Vaidehi Menon, Yong-Jie Hu, Liang Qi |
On-Site Speaker (Planned) |
Vaidehi Menon |
Abstract Scope |
It is well-known that slip-grain boundary (GB) interactions strengthen materials (Hall-Petch relation). Analyzing these interactions in HCP Mg alloys could provide crucial information on how to improve their strength and ductility for light-weight structural applications. In a previous study (in publication), via molecular dynamics (MD) simulations, we found that certain GB + loading orientations promote nucleation of pyramidal partial <˝c+p> dislocations at GBs, and adding Y-clusters to the GB lowers critical stress for slip nucleation. Further interaction of <˝c+p> slip with GBs nucleated more <˝c+p> slip (evidenced by high number of I1 SFs). In this talk, we extend our MD investigation to the interaction of different slip systems with several individual Mg GBs, to analyze both geometric and energetic transmission parameters, and relate them to macroscopic values. We also compare the pure Mg GB results with solute-segregated Mg GBs, to understand the effect of GB chemistry on slip transmission behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Mechanical Properties, Modeling and Simulation |