. Standard friction stir welding process parameters have a considerable impact on the
quality of functional parts produced by underwater friction stir welding (UWFSW) with
additive water. Hybrid statistical techniques may be used to optimize operating parameters in
order to improve the aim function. The tensile strength (UTS)of parts fabricated with UWFSW
by Al 6063 material in accordance with ASTMD638-14 tests is investigated in this study. In
the construction of test specimens, three parameters were varied: rotational speed from 1000 to
1800 rpm, travel speed from 4 to 10 mm/s, and shoulder diameter from 10 to 20 mm. The
response surface methodology (RSM) based central composite design (CCD) matrix for the
parametric combination was constructed using a second-order polynomial fitting model. The
maximum UTS of testing samples on the 201T universal testing machine (UTM) was 208.27
MPa. These process parameters are also optimized using hybrid optimization approaches such as response surface methodology- genetic algorithm (RSM-GA). RSM-GA had the highest
precision of 98.99 percent, which resulted in optimal characteristics such as rotating speed
1800 rpm, travelling speed 4 mm/s, and shoulder diameter 15 mm, which resulted in a maximum tensile strength of 199.0212 MPa. |
