Effects of Ti reinforced particles on mechanical properties and wear properties of Mg-9Gd-4Y-2Mn-1Zn composites

In the research of magnesium-based composites, the plasticity and strength of the materials are the most critical factors affecting their applications. In this paper, Ti particle-reinforced Mg-9Gd-4Y-2Mn-1Zn matrix composites were prepared by semi-solid stirring and hot extrusion processes. The main objective is to study the effects of different contents of spherical Ti particles (0, 3, and 5wt%) on the microstructure, mechanical properties and wear resistance of the composites. The results show that the addition of Ti particles can form a good interface bond with the matrix, and refine the undeformed coarse grains in the material, which has a certain increase in the hardness, yield strength (YS), ultimate tensile strength (UTS) and elongation (EL) of the material. In addition, when subjected to friction grinding under a force of 100 N, compared with the matrix, the composite material reinforced with Ti particles shows a lower wear rate and friction coefficient, demonstrates higher wear resistance, and can be applied in more fields.