About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
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Symposium
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12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
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Presentation Title |
The Influence of Ca on the Precipitation Behavior in a Mg-rare Earth Alloy |
Author(s) |
Qianying Shi, Bruce Williams, Anirudh Natarajan, Anton Van der Ven, John Allison |
On-Site Speaker (Planned) |
Qianying Shi |
Abstract Scope |
The potential effect of Ca for improving the precipitation strengthening of Mg-rare earth (RE) alloy system has not been well explored. In this study, a systematic characterization of precipitation behavior during the aging process was conducted for a Ca-containing Mg-Nd-Y alloy. In this quaternary alloy system, a very similar precipitation type and evolution sequence was observed compared to Mg-Nd-Y ternary alloy system. The clustered combination of β’’’ and β’ precipitates accounted for the aging peak at 200°C. Both TEM-EDS and APT characterization showed the Ca segregation in both β’’’ and β’ metastable strengthening phases. This indicates the positive effect of Ca to promote precipitation in Mg-RE alloys and thus enhance precipitation strengthening. The current results provide the possibility for using Ca as an alternative alloying element to reduce the level of RE elements and expand the commercial use of high strength Mg-RE alloys. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |