|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||The Effect of Manganese and Strontium on Iron Intermetallics in Recycled Al-7% Si Alloy
||James Mathew, Prakash Srirangam
|On-Site Speaker (Planned)
The present work deals with the effect of strontium and manganese on modification of iron intermetallics in Al-7% Si alloy. Alloys were prepared with 1% and 2% Fe in Al-7%Si. In order to study the modification effect, Mn and Sr were added to Al-Si-Fe alloys. Microstructure and mechanical properties were studied using optical microscope, SEM and tensile testing of modified and unmodified alloys. Results show that addition of 0.5% Mn results in modification of needle like β-Al5FeSi intermetallics to Chinese script morphology. However, Mn addition above 0.5% resulted in formation of much coarser α-phase intermetallics in the alloy. Most of these α-phase compounds were identified as Al15 (Fe,Mn)3Si2. Further, addition of strontium to Al-7Si-2Fe-1Mn alloy showed modification of eutectic silicon, but no significant modification of iron intermetallics in the alloy. Tensile test results show that the combination of Mn and Sr additions improved the strength properties of Al-7Si -2Fe alloy.
||Planned: Light Metals