Welding is a technique by which two or more than two metals and alloys can be joined.There are different types of welding technique like Gas welding.Arc welding.Resistance welding and solid state welding etc, but friction stir welding having a very important application in aerospace and ship building area.Friction stir welding is a type of solid state welding and heat is generated by friction that is used to join any two or more than two metals and alloys.In present work two aluminium alloys viz.AA2011 and AA3003 having 5mm thickness of plates are joined by friction stir.welding using vertical milling machine taking different levels of parameter i.e rotational speed of tool viz.1200, 1950 and 3080 RPM and welding speed viz.15, 25 and 45 mm/min.to find out the maximum hardness (Rockwell hardness) of welded aluminium alloy joint.Further Taguchi method reveals that tool rotational speed is the most significant parameter which contributes to the Rockwell hardness 75.4% subsequently followed by welding speed which contributes 24.6%.
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Kumar et al. (2024) studied this question.
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