Abstract
AbstractCorrosion plays a very important role in the modern world, and there are many causes for the corrosion, in which welded joint is one of the cruiser parts, where the material undergoes corrosion. Current investigation focuses on the study of the corrosion behaviour of welded and unwelded zone in hybrid aluminium metal matrix composite. Aluminium 7075 alloy is known for its high strength and good corrosion resistance property; thus, it has a wide range of applications in building bridges, aerospace, industries, defence equipment, transport industries, railway transports and aircraft industries. An attempt is made to study the corrosion behaviour of hybrid composite aluminium alloy 7075 metal matrix prepared with fine greenish SiC of 7% along with chopped E-glass fibre and AA7075 of about 90% was produced by stir casting method with the help of graphite crucible furnace. Then the process was followed by (FSW) friction stir welding process for joining, where two hybrid MMC metals are joined with the help of a cylindrical tapered tool, with different welding parameters like transverse speed and tool spindle rotational speed of about 600, 900, 1200 rpm and feed rate is about 40, 80, 120 mm/min. Impetus gives normal force, effects of torque and the transverse force which is affecting the plate while welding. The corrosion is mainly contingent on environmental conditions, and thus the test followed by the specimen was placed in sodium chloride solution for 24 h, the flow of the election was determined between the standard electrons and sample metal piece concerning corrosion rate. The main objective is to study and evaluate the result compared with a hybrid MMC plate with aluminium 7075 base metal and weld zone. We observed that the corrosion resistance of welded composite material exhibits very high resistance to corrosion because of the uniform distribution of atoms and the compaction of atoms at the welding zone. When compared to base material welded zone exhibits a better corrosion resistance property and also changes in grain size and grain shape the effects of corrosion behaviour of a welded joint by FSW process when compared to aluminium 7075 base material.KeywordsCorrosionFSWStir castingSilicon carbideE-glass fibre
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