Abstract
The present investigation is used to analyze the strain hardening behaviour of friction stir welded magnesium alloy. Hot rolling process is involved in strain hardening of magnesium alloy. The alloy is operated at above the recrystallization temperature. Titanium zirconium molybdenum (TZM) and cubic boron nitride (CBN) tool tip is considered for friction stir welding process (FSW). Vicker hardness tester is used to evaluate the hardness after strain hardening process. In FSW process, tool rotational speed, welding speed and feed is considered to evaluate the hardness. Hardness is measured and compared with tool tip materials. The optimal hardness is attained by taguchi method. Surface plot is used to analyze the correlation between input and output constrains. Liquid penetrant inspection is utilized to found the defects in welded joints. Optimal hardness was achieved at tool rotational speed of 1500 rpm, welding speed of 50 mm/min and feed of 15 mm/min.
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