|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Solidification Processing of Light Metals and Alloys: An MPMD Symposium in Honor of David StJohn
||Controlling the Eutectic Microstructures of Mg based Alloys for Functional Properties
||Kazuhiro Nogita, Stuart McDonald, Manjin Kim, Xuan Quy Tran, Syo Matsumura
|On-Site Speaker (Planned)
The morphology and scale of eutectic phases in Mg-based alloys can strongly influence functional properties such as hydrogen storage as well as structural properties. Conventional solidification theories predict the relationship between undercooling, growth velocity and eutectic spacing which are all strongly interrelated in typical shape castings and dependent upon nucleation and growth mechanisms. It has also been demonstrated that trace element additions, such as Na to Mg-Ni alloys can refine, or ‘modify’ the eutectic morphology, similar to the effect of Sr and Na in Al-Si alloys. This work further investigates the morphological modification of the Mg-Mg2Ni eutectic and the underlying mechanisms. An overview is also provided of the relative importance of eutectic microstructures in functional properties such as hydrogen storage and release.