Shivaprasad, C.G.Kiran Aithal, K.Narendranath, S.Desai, V.Mukunda, P.G.2026-02-052015International Journal of Microstructure and Materials Properties, 2015, 10, 46115, pp. 274-28417418410https://doi.org/10.1504/IJMMP.2015.072921https://idr.nitk.ac.in/handle/123456789/26374The effect of melt treatment owing to the combined addition of grain refiner and modifier on the microstructure and mechanical properties of Al-Si alloys having 7% (hypoeutectic), 12% (eutectic) and 15% silicon (hypereutectic) is studied. 1 wt. % of Al-1Ti-3B Master alloy was used as grain refiner. For modification of eutectic Si, 0.2 wt. % of Al-10Sr Master alloy was added to hypoeutectic alloy and 0.4 wt. % is added to eutectic alloy as well as hypereutectic alloy. Furthermore, refinement of primary Si in hypereutectic alloy was achieved by addition of 0.04 wt. % of phosphorus. The goal of this investigation is to determine the influence of combined addition of grain refiner and modifier on mechanical properties and qualitatively correlate with the microstructural changes. © 2015 Inderscience Enterprises Ltd.Aluminum alloysBinary alloysEutecticsGrain refinementGrain size and shapeHardnessMechanical propertiesMicrostructureRefiningStrontium alloysTitanium alloysWear of materialsAl-Si alloyEutectic alloysHypereutectic Al-Si alloysHypereutectic alloyHypoeutectic alloysMicrostructural changesMicrostructure and mechanical propertiesModificationSilicon alloys