【摘要】 采用超声波振动铸造法制备石墨烯纳米片(GNPs)增强A380复合材料(GNPs/A380复合材料)。研究复合材料的显微组织、时效行为和力学性能。研究发现，GNPs可缩短GNPs/A380复合材料的峰值时效时间，GNPs-Al界面可作为析出相更稳定的成核点。通过GNPs的桥接，基体的协调变形增加，GNPs/A380复合材料的断裂面上出现更大韧窝。由于细晶粒强化、载荷传递和沉淀强化机制，GNPs/A380复合材料的屈服强度比A380合金提高了28.1%。更多还原

【Abstract】 Graphene nanoplatelets(GNPs) reinforced A380 composites(GNPs/A380 composites) were prepared by ultrasonic vibration casting method. The microstructure, aging behavior and mechanical properties of the composites were investigated. It was found that the peak aging time of GNPs/A380 composites could be decreased by GNPs. The GNPs-Al interface could serve as a more stable nucleation site for the precipitated phases. With bridging GNPs, the coordinated deformation of the matrix is increased and larger dimples appear on the fracture surface of GNPs/A380 composites. The yield strength of the GNPs/A380 composites increased by 28.1% compared with that of the A380 alloy due to the fine grain strengthening, load transfer and precipitation strengthening mechanisms.更多还原