The effect of vibration frequency on shear punch strength and wear resistance of AZ70 magnesium matrix composite manufactured by FSVP

A friction stir vibration processing (FSVP) with different vibration frequencies (20 Hz, 40 Hz, and 80 Hz) was employed for the fabrication of AZ70/ZrO₂–CeO₂ surface composite with the aim of improving mechanical and wear performance. Thus, the influence of vibration frequency as a vital parameter on the microstructure and reinforcement distribution, shear punch strength (SPT), and wear behavior of the composites was investigated. The results indicated that the material flow, agglomeration of particles, and dislocation density were influenced by the increasing vibration frequency that can be contributed to the successive mechanical stirring-assisted plastic deformation/strain and further grain refinement. It was also demonstrated that when vibration frequency was increased, the shear punch strength (by about 34%) and wear resistance (by about 44%) of the developed composites improved.