Background/Objectives: Fsw process that doesn't require the filler material for joining the pieces. However, it is well established that adding a filler material to several welding techniques increases weld grade, joint durability, andother constructional qualities.

Methods/Statistical analysis: FSW is a modern technique which overcomes many demerits of conventional welding processes like generation of harmful gases and requirement of high energy input. TRS 800rpm, 1000rpm,or 1200rpm, and TTS 20, 30, or 40 (in mm/ min) are considered to see the effect on hardness of weld joints under Taguchi L9 and ANOVA.

Findings: In research, using tool rotation speeds of 800rpm, 1000rpm, or 1200rpm & tts of 20, 30, or 40 (in mm/ min). As tool rotation speed is increased, the hardness is predicted to climb for 1200 rpm with 30 mm/ min. Design of Experiment has been prepared by Taguchi's orthogonal system which helps to take better results with optimum number of experiments.

Improvements/Applications: FSW finds its applications in the field of manufacturing industry; like in ship building, aerospace, production of automobiles and used extensively in fabrication of aluminium plates/sheets, and materials like steel, magnesium.

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