Evaluation of mechanical and tribological properties of AL7075 hybrid metal matrix composite reinforced with fly ash and graphite

The study focuses on fabricating the Composites where Al 7075 as matrix material, Fly Ash and Graphite as reinforcement material by using Stir Casting arrangement with proper distribution of ash particles all over the specimen. Fly-ash can be used for preparing MMC's which can turn industrial waste into industrial wealth. This can also solve the problem of storage and disposal of fly ash. The composition of the casted specimen is 90 wt% Al7075 alloy which has to be kept as constant, and varying the type of the solid lubricants: graphite, and Fly ash. The samples of Al7075 were fabricated with different weight percentages of (0, 3, 6, and 9 wt%). Al7075 composites are successfully fabricated through the stir casting process. The casted specimens are machined for the necessary testing as per the ASTM standards. The mechanical properties like tensile strength, compression strength, and hardness of the fabricated composites are evaluated by conducting experimental tests while the wear properties were evaluated via the pin-on-disc method. (C) 2020 Elsevier Ltd. All rights reserved.