| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2020
|
| Presentation Title |
Towards the Development of High Ductility Mg-Al Based Alloys Through Second-phase Refinement with Trace Yttrium Additions |
| Author(s) |
Konstantinos Korgiopoulos, Mihriban Pekguleryuz |
| On-Site Speaker (Planned) |
Konstantinos Korgiopoulos |
| Abstract Scope |
Magnesium alloys are attractive lightweight materials for transport industry as they offer a viable approach for reduced CO<sub>2</sub> emissions and fuel economy. The most widely used alloys for automotive applications are based on the Mg-Al system where the principal second phase β-Mg<sub>17</sub>Al<sub>12</sub> provides strengthening but reduces ductility. A key factor in widening the use of magnesium in crashworthy components such as vehicle body applications is the availability of cost-effective Mg casting alloys with improved ductility. Modification of the Mg<sub>17</sub>Al<sub>12</sub> in Mg-Al alloys via trace additions is a promising approach to enhance the ductility while maintaining the strength. Our research has found that only trace levels of yttrium (Y) can modify the Mg<sub>17</sub>Al<sub>12</sub> and improve the ductility of Mg-6Al alloy by 63%. To elucidate the mechanism of this refinement, different methods are used including thermodynamic calculations, image analysis, scanning and transmission electron microscopy.
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| Proceedings Inclusion? |
Planned: |