About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Deformation-induced Microstructural Evolution during Solid Phase Processing: Experimental and Computational Studies
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Presentation Title |
Deformation Induced G.P. Zone Formation in Magnesium Alloys |
Author(s) |
Taisuke Sasaki, Jhe-Yu Lin, Peng Yi, Zehao Li, Eswarappa Prameela Suhas , Abigail Park, Elaine Lipkin, Alice Lee, Michael Falk, Timothy Weihs, Kazuhiro Hono |
On-Site Speaker (Planned) |
Taisuke Sasaki |
Abstract Scope |
A dispersion of Guinier Preston (G.P.) zones yields attractive mechanical properties in wrought magnesium alloys. This presentation introduces deformation-induced G.P. zone precipitation, which could be a new pathway to precipitate G.P. zones in a variety of magnesium alloys. Correlative transmission electron microscopy/atom probe tomography (TEM/APT) analysis showed that equal channel angular extrusion at 150°C has unexpectedly led to a dispersion of G.P. zones in Mg-9Al and Mg-5Zn (wt.%) alloys. Hybrid molecular dynamics/Monte Carlo simulations suggest that the attraction of Al and Zn solute atoms to vacancy clusters formed from excess vacancies during extrusion can be the major driving force for the G.P. zone formation. This combination of experiments and computations demonstrates that strategic control of atomic-scale defects can provide an innovative approach to strengthening magnesium alloys. In the presentation, the deformation-induced precipitation of G.P. zone will be further discussed as a function of strain. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Characterization, |