Study of changes in the aging process, microstructure, and mechanical properties of AA2024-AA1050 nanocomposites created by the accumulative roll bonding process, with the addition of 0.005 vol.% of alumina nanoparticles

Abstract

Abstract We created AA2024-AA1050 and AA2024-AA1050/0.005 vol.% Al2O3 nanocomposites by six accumulative roll bonding (ARB) process stages. AA2024 and AA1050 sheets with a thickness of 0.7 mm were used to create a composite. Also, plate-shaped alumina nanoparticles were used in the composites. The two AA1050 and one AA2024 sheets (among the two AA1050 sheets) were ARB-ed up to six cycles with and without adding alumina nanoparticles. Also, a sample of the AA1050 without composite making was ARB-ed up to six cycles. Some composites were aged after the ARB process in the furnace at 110, 150, and 190°C. SEM, TEM, and EDS-MAP analyses, tensile strength, microhardness, and Pin-on-Disc tests were performed to study the ARB-ed sheets. The results of the tensile tests showed that the tensile strength of AA2024-AA1050 created by the six stages ARB process was two times more than primary AA1050. Also, the wear resistance of this composite was 74% more than six cycles ARB-ed the AA1050. Using 0.005 vol.% alumina nanoparticles in AA2024-AA1050 composite improved its wear resistance by 30%. In the following, the aging process caused to improvement in tensile strength and total elongation of AA2024-AA1050/Al2O3 nanocomposites.