Production of AA2024 matrix Al2O3-SiC reinforced hybrid nanocomposites using T/M method and investigation of ballistic performance

In this thesis, the microstructures and mechanical properties of AA2024 matrix Al2O3 and SiC reinforced hybrid nanocomposites with 63μm particle size obtained using Powder Metallurgy (T/M) method, which is one of the production methods, were investigated. Powder mixtures of AA2024/Al2O3, AA2024/SiC and AA2024/Al2O3-SiC were prepared in different proportions and kept at 560 ºC for 120 minutes. It was produced by hot pressing method at 500 MPa pressure in time. In order to determine the microstructure and mechanical properties of the produced samples, microhardness, density, tensile, corrosion and ballistic tests were performed using SEM, EDX and XRD images. The results revealed that the best tensile test result in all AA2024/Al2O3, AA2024/SiC and AA2024/Al2O3-SiC nano composite materials was obtained from 2% reinforced composite materials. It was determined that one of the most important parameters affecting the tensile strength was the amount of Al2Cu interphase formed. The hardness values increased with the increasing reinforcement ratio. Corrosion rates increased with increasing reinforcement ratio of materials, but corrosion rates decreased continuously after 2% reinforcement ratio. The lowest corrosion rates were found in 5% reinforced composite materials. As a result of ballistic test, 2% reinforced composite materials provided the highest value. After 2% reinforcement rate, ballistic test values decreased.