Effect of Ti reinforcement on the thermal behaviour of AZ91/Ti composites
Despite magnesium's high strength-to-weight ratio and eco-friendly nature, its limited industrial applications due to low corrosion and wear resistance have prompted extensive research into enhancing these properties. Magnesium matrix composites have been developed with various reinforcements, including B4C, SiC, carbon nanotubes, graphite, and titanium (Ti). Among these, Ti is particularly promising as it improves wear resistance while preserving mechanical strength and ductility. In this study, the influence of Ti volume fraction on the thermal properties of AZ91/Ti composites fabricated via powder metallurgy is explored. Results revealed a reduction in thermal conductivity up to 6 % Ti content (6 W/m‧K), attributed to Ti's lower thermal conductivity compared to magnesium. However, the Mg + 8% Ti composite exhibited enhanced thermal conductivity (10.51 W/m‧K), but mechanical properties degraded. After analysis of physical, mechanical, and thermal tests, it is concluded that 6 % Ti volume fraction is the optimum choice for balancing mechanical performance in Mg/Ti composites. This research contributes valuable insights for tailoring Mg/Ti composites to specific engineering needs, offering a potential solution to the challenge of wear resistance in magnesium-based materials.