Abstract
IC engines are subjected to constant heat and friction when the engine is running at full capacity and maximum load. In the piston head, the part known as the combustion bowl often is exposed to massive pressure and high heat temperatures, which can lead to crack openings in it eventually leading to engine breakdown.Hence, this experiment was conducted to study the grain structures of the materials used in the combustion bowl, to study its refinement and also find the hardness of the material. H13 3000 series Aluminum and SS304 steel were the materials chosen to do the experiments. Six welding samples was processed in which two are of Aluminum-Aluminum, two are Steel-Steel and two are Steel-Aluminum. A rotary friction welding machine was used for the experiment. The objectives of the experiment were to study the porous structure of the welded region, to find the grain refinement in all of the six experiments performed in all of the cases, and to study the microstructure by performing the Vickers hardness test to inspect the hardness of the welded region in all six cases.Upon inspection it was found that there is a significant increase in percentage of hardness in the welded zones of steel samples when compared to aluminium samples.
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