Underwater friction-stir welding of a stir-cast AA6061-SiC metal matrix composite: optimization of the process parameters, microstructural characterization, and mechanical properties

Abstract It is an underlying fact for the case of joining process especially welding to have optimized parameters achieve joints with outstanding mechanical characteristics. In current article, using stir-cast aluminum-based alloy (Al 6061) Al 6061/5%wt. silicon carbide, 6061/10%wt. and 6061/18%wt. carbide was welded underwater friction-stir process. Optimum [namely, tool rotating speed (N), (S), (SiC)] are investigated analysis variance (ANOVA) response surface methodology (RSM) statistical approaches. High ultimate tensile strength microhardness were set as required characteristics quality welds. Since there two responses objectives, multiple-criteria decision-making approach—response performed alongside ANOVA. Optimal from these approaches converged a 1,736.36 rpm, 11.58 mm/min, SiC 16.67%, respectively. For inquiry, computed 984 MPa 89.9 HV, respectively, values congruent findings effectiveness studies. deduced this study that optimal convergent irrespective used techniques experimental data.