Stir casted SiC-Gr/Al6061 hybrid composite tribological and mechanical properties

Abstract

The improvement in the mechanical properties of composites is always an essential requirement for technological development. In this work, hybrid aluminum matrix composites fabricated using the stir casting technique. Silicon carbide and graphite used as reinforcement to improve the mechanical properties. AMCs produced by adding various volume fraction of SiC (5%, 10% and 15%) whereas fixed volume fraction (10%) of the graphite used in composites. The fabricated AMC samples were tested to determine the tensile strength, hardness and wear rate. The wear rate was determined under the different loads (10 N, 20 N, 30 N and 40 N) and sliding velocities (0.4 m/s, 0.8 m/s, 1.2 m/s and 1.6 m/s). Mechanical properties of fabricated AMCs are evaluated and compared with Al6061 alloy. The results discovered that the tensile strength and hardness increased from 490 to 710 MPa and 65VHN to 85VHN respectively with the addition of silicon carbide and graphite particles. The wear rate also increased with the increase of applied load. However, for sliding velocity it surges till 1.2 m/s then decreased steeply.

Impact of Prolonged Exposure of Eleven Years to Hot Seawater on the Degradation of a Thermoset Composite

“…The reduction percentages are 8.2%, 29.7%, and 54.4%, respectively. These results show that exposure to seawater at elevated temperatures caused a higher reduction in the tensile strength than immersion in seawater at 23 °C [ 3 , 31 , 46 , 47 , 48 , 49 , 50 , 51 ]. The graph demonstrates that the tensile strength reduced by 46.6% after exposure for 5 years.…”

Effect of the Stirring Velocity and the SiO2 Precursor Particles Feeding Rate on the Microstructure of the Al2O3/SiO2/Al Composites Prepared via Stir Casting Process

“…The AMCs like SiC/Al, [ 9 ] Al 2 O 3 /Al, [ 10 ] and SiO 2 /Al [ 11 ] are popular in the industry. It is noticed that the SiO 2 possesses high hardness, low coefficient of thermal expansion and abundant availability.…”

Impact of AlN-SiC Nanoparticle Reinforcement on the Mechanical Behavior of Al 6061-Based Hybrid Composite Developed by the Stir Casting Route

“…ese materials are used in a variety of structural applications in a variety of sectors, including marine, aircraft, and automobiles [1,2]. Rail coaches, towers, pylons, military and commercial bridges, aerospace applications, shipbuilding operations rivets, truck frames, and transportation are just a few of the heavy-duty structural uses for aluminium alloy 6061 [3]. Al 6061 is the repeatedly utilized matrix material owing to its low density and electrical resistance, high and good strength, superior corrosion resistance, and greater machinability [4].…”