|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Investigation on the Effect of Si Addition in Controlling the Microstructure of Mg-4wt%Al-4wt%RE Alloy
||Vigneshwar Hari, Dongdong Qu, Trevor Abbott, Kazuhiro Nogita
|On-Site Speaker (Planned)
The structural light metal AE44 with the composition Mg-4Al-4RE (RE: rare earth) has a high specific creep resistance which makes it a promising alloy applied in industry. In this work, the RE element is tried as pure La, pure Ce and a mixture of La and Ce of different ratios. The effect of trace Si addition into the AE44 alloy system is studied via investigating the variation of the cast ingot microstructure. It is found that 0.1% Si managed to modify La contained intermetallic in the Mg-4Al-4La system. The solidification mechanism of the Si modified AE44 alloy is discussed based on the calculated thermodynamic assisted by ThermoCalc.