| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
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| Symposium
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Materials Science for Global Development -- Health, Energy, and Environment: An SMD Symposium in Honor of Wole Soboyejo
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| Presentation Title |
Mechanistic Origin of the Enhanced Strength and Ductility in Mg-rare Earth Alloys |
| Author(s) |
Henry Ovri, Juergen Markmann, Juri Barthel, Maximilian Kruth, Hajo Dieringa, Erica T. Lilleodden |
| On-Site Speaker (Planned) |
Henry Ovri |
| Abstract Scope |
The utility of classical Mg alloys is limited by poor ductility and low yield strength. However, low concentrations of rare earth (RE) additions in Mg are known to significantly improve these properties. Nevertheless, the micromechanisms underlying these improvements remain unclear. Evidently, an understanding of these mechanisms is critical for the optimization of existing Mg-RE based alloys. We gained insights into the origin of these improvements by comparing deformation modes in single crystals of pure Mg and a homogenized Mg–0.75 at.% Gd alloy oriented for twinning, pyramidal– and basal–slip. In this talk, we will show that Gd-rich short-range ordered (SRO) clusters in the alloy mediate the improvements. We demonstrate that the SRO mediated changes will lead to increased strength and pyramidal slip activity, and ultimately improvements in ductility, in homogenized polycrystalline Mg-Gd alloys. |
| Proceedings Inclusion? |
Planned: |