Friction Stir Welding Process Parameter Optimization for AZ31 and AZ91 Magnesium Alloy Material using Design of Experiments and Taguchi Approach
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Abstract
As a welding process is key aspect for any fabrication work; which joint dissimilar or similar material with or without application of pressure as per necessity. In a welding process base metal turns to a plasticized form which lead to joining of metals. Friction Stir Welding (FSW) is a one type of welding process mostly employ by an industry with a application of weld tool and desired pressure. In this research article, two alloys of magnesium, AZ31 and AZ91 are used as base material and by adopting FSW method to obtain process parameter with the help of optimization tool. Different mechanical properties like ultimate tensile strength, percentage of elongation along with microstructure behavior of welded specimen are observed to comment on best possible process parameter for magnesium alloy. In this research work base material are prepared from the sheet of 5000 series magnesium alloy with 150 mm in length, 50 mm in width and 5 mm in thickness dimension prior to perform the welding process. Using the Design of Experiment (DOE) and Taguchi approach as an optimization tool along with the universal testing machine for the evaluation of different process parameter of welded structure.
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