article · Alexandria Engineering Journal
Accumulative roll bonding can be used to manufacture dual-matrix aluminium-nickel composites reinforced with silicon carbide particles. Processing the material through up to seven bonding cycles achieves a homogenous dispersion of the three constituent phases. Incorporating a nickel layer between the aluminium matrix and the silicon carbide particles improves particle dispersion, which directly boosts the mechanical strength of the resulting material. Across trials testing particle concentrations of one, three, and five weight percent, composites containing three percent silicon carbide delivered the highest tensile strength, reaching 257 MPa compared to 37.2 MPa for base AA1050 aluminium. Adding higher amounts of silicon carbide diminishes interlayer adhesion and lowers elasticity. At five percent silicon carbide, strength declines after three cycles because stress concentrations around the ceramic particles crack the nickel layer. Hardness steadily increases with particle loading, reaching its peak in the five percent composite.
Aluminium is lightweight but often lacks the strength required for demanding engineering tasks. By combining aluminium with nickel and hard ceramic particles through accumulative roll bonding, structural properties can be substantially enhanced. Identifying the optimal ceramic content ensures that materials gain significant tensile strength and hardness without suffering premature internal cracking or excessive loss of ductility.
This work represents early-stage materials research exploring manufacturing parameters for reinforced metal composites. The resulting dual-matrix composites offer high tensile strength and increased hardness, which may interest manufacturers seeking lightweight structural materials. However, the abstract does not specify target commercial products or industrial partners, indicating that the technology remains at an experimental laboratory level.
AI-generated from the published abstract. Always read the original work before citing.
This article discusses the correlation between the microstructural and mechanical changes in the dual-matrix Al-Ni/SiC composites processed by Accumulative Roll Bonding (ARB) technique. Three different SiC concentrations, 1, 3, and 5% were considered to reinforce Al and Al-Ni dual-matrix composites. ARB process was applied up to 7 cycles to manufacture a composite with homogenous dispersion of the three phases. The results showed that the presence of Ni layer between Al and SiC particles enhanced the dispersion of SiC in the matrix, which positively affect the mechanical strength. The maximum tensile achieved was 257 MPa for composite containing 3 % SiC after 7 ARB cycles compared to 37.2 MPa for the AA1050. Increasing SiC content reduces the adhesion between Al and Ni layers, which reduces the elasticity of the composites. However, for the composites with 5% SiC, after 3 ARB cycles, the strength was reduced due to the cracking of the Ni layer caused by the stress concentration around the SiC particles. The hardness values of the ARBed AA1050, AA1050-Ni, and AA1050-Ni/5 wt% SiC are 85.5, 93.5, and 109.7, respectively, after 7 ARB cycles. In terms of strength, the samples with 3% SiC content showed the optimum stress enhancement with minimum reduction in the elongation, which achieve a compromised response for many applications.
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DOI: 10.1016/j.aej.2023.07.030
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