|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Magnesium Technology 2016
||Hot Tearing of Magnesium-Rare Earth Based Alloys
||Mark Easton, Serge Gavras, Mark Gibson, Suming Zhu, Jian-Feng Nie, Trevor Abbott
|On-Site Speaker (Planned)
Magnesium-rare earth based alloys generally show good creep resistance at elevated temperatures and are consequently very promising candidates for powertrain applications. However, for magnesium-rare earth alloys to be used in powertrain applications, they also need to have sufficient die-castability. This paper combines the data from a series of investigations into binary, ternary and quarternary magnesium-rare earth based alloys with the rare earths including La, Ce, Nd, Y and Gd to identify alloy compositions that are castable. It was found that Mg-La based alloys had the lowest susceptibility to hot tearing whilst there were compositions of Nd, Y and Gd that had very high hot tearing susceptibility. A simple a priori indicator based on the temperature-fraction solid profiles with fitted coherency and coalescence points is compared with the experimental observations and found to provide a reasonable indication of alloy susceptibility to hot tearing.
||Planned: A combination print-CD volume