|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Defects and Properties of Cast Metals
||L-42: Solidification Path of Fe Bearing Phases in the Effect of Sr and Cooling Rate in Al-Si Hypoeutectic Alloys
||Jeyakumar Manickaraj, Anton Gorny, Sumanth Shankar
|On-Site Speaker (Planned)
Our previous study for without Sr addition in Al-Si hypoeutectic alloys had shown anomalous evolution of the θ (Al13Fe4) phase followed by the τ5 (Al15FeSi2) phase, which later transformed into the τ6 (Al9Fe2Si2) phase at lower cooling rates during solidification. In the present study of understanding this Fe bearing intermetallic phase transformation in the addition of Sr was carried out with various amounts of Si, Fe additions and cooling rates. Dissolution of the cast alloy was carried out to separate the Al matrix and residual particles. X-ray diffraction analysis on the residual particles show that addition of 0.02 wt% Sr into this alloy significantly altered the solidification path of these Fe bearing phases and resulted in the evolution of the θ phase which later transformed to τ2 (Al3FeSi) and or τ4 (Al3FeSi2) followed by the evolution of the terminal τ6 (Al9Fe2Si2) phase.
||Planned: Supplemental Proceedings volume