Experimental Investigations of Microstructural and Mechanical Behaviour of Aluminium Alloy 7075 Hybrid Nanocomposites
K L. Kishore, K. T. Balaram Padal, D. Ranga Raju
Quarterly No. 4, 2023 pages 226-234
DOI: https://doi.org/10.62753/ctp.2023.07.4.4
keywords: aluminium 7075 alloys, hybrid metal matrix composites, micro hardness, compressive strength, microstructure
abstract In this paper, the microstructural and mechanical characterisation of hybrid composites with a metal matrix was conducted. Al2O3 nanoparticles and CNTs were added to strengthen an aluminium alloy (AA 7075) using solid-state powder metallurgy. Utilizing XRD analysis and scanning electron microscope (SEM), microstructural characterization was carried out. Uniaxial compression and microhardness testing were performed to determine how the hybrid composites behaved mechanically. The microstructural research revealed that the nanoparticle dispersion in the matrix is uniform. The XRD plots and the Williamson-Hall equation were used to evaluate the crystallite size, lattice strain and dislocation density. In comparison to the base alloy, the composites have better strength and microhardness.