Abstract
In this paper, the optimization of the FSW tool pin profile and shoulder-to-pin ratio is carried out to achieve high tensile strength and hardness for dissimilar Al and Mg alloys. The FSW experiment with Al and Mg alloys is designed according to Taguchi's L9 orthogonal array by varying the tool pin profile and shoulder-to-pin diameter ratio. Grey relation analysis is a multiple response optimization method used to optimize the result of the experiment. The results show that the optimum tool pin profile is a cylindrical threaded pin profile tool, and the optimum shoulder-to-pin diameter ratio is 3. The maximum tensile strength, yield strength and hardness achieved in this experiment is 147 MPa, 139 MPa, and 96 HV respectively.
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