Computer aided cooling curve analysis for Al-5Si and Al-11Si alloys

Abstract

The effect of grain refiner, modifier, and combination of grain refiner cum modifier was studied on Al-5Si and Al-11Si alloys using computer aided cooling curve analysis. For combined grain refinement and modification effect, Al-Ti-B-Sr single master alloy was developed that acted as both grain refiner and modifier. For thermal analysis, the temperature throughout the solidification range was recorded. The resultant plot of temperature versus time was thermal analysis. The computer aided cooling curve analysis studies shows that the extent of undercooling ΔT_α-Al was reduced significantly after the addition of grain refiner to the melt. It also indicates that the eutectic temperature was suppressed on the addition of modifier to the melt.