On the impact of using alumina nanoparticles and initial aging on the microstructure and mechanical properties of the AA1050/AA2024 nanostructure composite, created by accumulative roll bonding (ARB) method

Abstract

In this research, AA1050/AA2024 layered composites were created through six cycles of the ARB process. In this direction, the effect of using the reinforcing nanoparticles and the initial aging process on the mechanical properties and microstructure were researched. Two sheets of AA1050 and one sheet of AA2024 alternatively were used to create the composite. Also, 0.005 vol% Al2O3 nanoparticles were used. Moreover, the aging process lasted for 30 min at 190 ᵒC. Once the aging process was completed, the S′ precipitates with less than 100 nm thickness were formed. After six ARB cycles and using reinforcing particles, the equiaxed ultra-fine grain microstructures were created. The grains were about 500 nm in size. The S′ precipitates improved tensile strength. The alumina nanoparticles resulted in 38% and 32% improvements in the AA1050/AA2024 composite's wear resistance to the annealed AA1050 and AA1050/AA2024 composite sheets, respectively.