Abstract
The replacement of cast iron by recent developed Al-hypereutectic composites are highly impacted to lower down the cost of production and enhances fuel efficiency. Parts like pistons, engine blocks and cylinder heads, brake plates and rocker arms manufactured from Al-hypereutectic composites can reduce and improve vehicle emissions. The present investigation to make the Al-hypereutectic composites reinforced with 1% Al2O3 using the stir casting method at different pouring temperatures. Addition of Al2O3 in Al-alloy which act as nucleating agent and causes for refinement of grain size and the effect of pouring temperature on microstructure as well as wear properties of composites are reported here. The morphology of primary as well as eutectic silicon was emphasized in this paper. The irregular primary silicon and eutectic silicon shapes are changes to fine globular shape of primary Si and fibrous and regular fine shape of eutectic Si. The study of microstructure-property relations are co-related here by means of changing the pouring temperature of the Al-hypereutectic composites.
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