Abstract
This paper studied Al6092/SiCp/β-LiAlSiO4 particle-reinforced aluminum matrix composites as the main object. Different solution aging treatment processes were selected to analyze the microstructure and mechanical properties of the specimens. The effects of solution aging on the microstructure, precipitation phases, and dislocations of the composites were revealed. The results showed that the solution aging treatment improved the stiffness and strength of Al6092/SiCp/β-LiAlSiO4 composites. On the one hand, solution aging promoted the generation of high dislocation density zones and Mg2Si precipitation phases in the samples, which increased the stress required for plastic deformation of the composites. In addition, the high modulus property of micron-sized SiCp can spontaneously carry loads, and the introduction of β-LiAlSiO4 promotes the dispersion of the reinforcing phase. In conclusion, the solution aging treatment and the particle-reinforced phase can jointly improve the deformation resistance of Al6092.
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