摘要
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.
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%。
基金
supported by the National Natural Science Foundation of China(No.51965040)。
