Effect of Porosity on the Thermo-Mechanical Behavior of Friction-Stir-Welded Spark-Plasma-Sintered Aluminum Matrix Composites with Bimodal Micro- and Nano-Sized Reinforcing Al2O3 Particles

The thermo-mechanical behavior of nanosized Al2O3 particles reinforcing aluminum was analyzed in the present paper. material prepared by spark plasma sintering and friction stir welding. thermal stresses affecting composite during welding were modeled through COMSOL MultiPhysics, results validated analyses composites’ mechanical properties. spark-plasma-sintered materials presented limited porosity, which taken into account modeling phase. Both model experiments revealed that higher heat input is related to better mixing sound Thermal lead residual close 300 MPa thermo-mechanically affected zone for processing conditions 1900 RPM 37 mm/min. This leads an increase hardness up 72 HV.