Evolution of microstructure and mechanical properties of graphene oxide-reinforced aluminum alloy (6061) composite fabricated via accumulative roll bonding

• Accumulative roll bonding effectively disperses graphene oxide in Al 6061 matrix, mitigating agglomeration and enhancing interfacial bonding. • The Al 6061/GO composite exhibits a 338.37% increase in yield strength and 86.42% improvement in hardness compared to annealed Al 6061. • Raman spectroscopy and X-ray diffraction confirm strong GO-matrix interaction and increased dislocation density, explaining the mechanical enhancements. • Fracture surface analysis reveals a strength-ductility tradeoff with reduced elongation and deep dimples, underscoring the potential for lightweight structural applications.