| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2020
|
| Presentation Title |
The Independent Effects of Cooling Rate and Na Addition on Hydrogen Storage Properties in Hypo-eutectic Mg Alloys |
| Author(s) |
Manjin Kim, Yahia Ali, Stuart David McDonald, Trevor Bruce Abbott, Kazuhiro Nogita |
| On-Site Speaker (Planned) |
Manjin Kim |
| Abstract Scope |
The addition of trace chemical refiners such as Na and Sr and rapid cooling are well-established methods for modification of the faceted eutectic Si and Ge in Al-Si and Al-Ge systems to improve mechanical properties. There have been some efforts to extend this strategy to Mg-based alloys. For example, it has been reported that trace Na addition to Mg-Ni alloys can also refine the eutectic Mg<sub>2</sub>Ni phase and facilitate functional property improvements such as hydrogen absorption kinetics. In this work, we have extended this strategy to a variety of other Mg-based alloys such as Mg-La alloys adding chemical refiners to Mg-based alloys and solidifying at several different cooling rates. The modification of the eutectic morphology in these alloys is discussed with regards to alpha parameters which were calculated using Thermo-Calc. The relationship between eutectic modification mechanisms and hydrogen absorption kinetics in these alloys is investigated. |
| Proceedings Inclusion? |
Planned: |