This work explored the influence and the strengthening mechanism of reinforcement with graphene nanoplatelets (GNPs) on the mechanical properties of 2024 aluminium alloy. AA2024 composites with GNPs (0, 1, 2, 3 and 4 wt%) were prepared by mechanical alloying and spark plasma sintering. GNPs were distributed on the surface of AA2024 particles, which reduced the oxidation effect after ball milling. An increase in GNPs prevented Al₂Cu phase precipitation in the SPS process. Co-existence of the Al₂Cu phase and GNPs affected the mechanical properties of the composites. The strengthening mechanism of GNPs on AA2024 was investigated based on load transfer, grain refinement strengthening and dislocation strengthening. The yield strength of 2% GNP composites reached 229.8 MP due to the synergistic strengthening effect of Al₂Cu and GNPs.

本工作探讨了石墨烯纳米片 (GNPs) 增强对 2024 铝合金力学性能的影响和强化机制。通过机械合金化和放电等离子烧结制备具有 GNP（0、1、2、3 和 4 wt%）的 AA2024 复合材料。GNPs分布在AA2024颗粒表面，降低了球磨后的氧化效果。GNP 的增加阻止了 SPS 过程中的 Al ₂ Cu 相沉淀。_{Al 2}的共存Cu相和GNPs影响复合材料的力学性能。基于载荷传递、晶粒细化强化和位错强化研究了 GNPs 在 AA2024 上的强化机制。由于Al ₂ Cu和GNP的协同强化作用，2% GNP复合材料的屈服强度达到229.8 MP。