Importance of pin number on mechanical properties and wear performance during manufacturing of AA6061/316 surface composite via FSP

Abstract

• Manufacturing of AA6061/316 stainless steel composite via FSP technique. • Particle refinement and homogenized dispersion were enhanced by changing the tool from single pin to double pin. • Using a double pin remarkably increased wear resistance of composite. The primary aim of this investigation was to fabricate AA6061/316 surface composites using single and double pin tools through the Friction Stir Processing (FSP) technique. Results depicted that increasing the number of pins from 1 pin to 2 pins remarkably affected the dispersion of reinforcement particles and as a result decreased the size of reinforcement particles from 44.69 to 35.04 µm that can be attributed to the drastic plastic/strain deformation, dynamic recrystallization (DRX), and pinning effect of reinforcement particles.