Effect of Ti6Al4V reinforcement particles on the mechanical, wear, and corrosion properties of AZ91D magnesium matrix composites

Abstract

This study aims to synthesize composite materials using TC4 particles and AZ91D alloy through semi-solid stirring and hot extrusion techniques. The main objective is to investigate the microstructure, mechanical properties, wear resistance, and corrosion behavior of composites comprising a minor volume fraction (0, 2, and 5 vol%) of spherical TC4 particles. The findings showed that the dual synergistic effect of TC4 particles and the β-phase leads to a refinement in the grain size of the composite material. Moreover, the incorporation of TC4 particles enhances the hardness, yield strength (YS), and ultimate tensile strength (UTS) of the magnesium matrix, with almost no reduction observed in ductility. Additionally, the TC4/AZ91D composite displays lower wear rates and friction coefficients compared to the matrix when subjected to forces of 150 N and 300 N. However, the corrosion performance of the composite material deteriorates due to the influence of the galvanic effect between the particles and the matrix.