搅拌摩擦加工法制备铝基复合材料组织与性能研究
Investigation on Microstructure and Mechanical Properties of Aluminum Matrix Composite Prepared by Friction Stir Processing
赵 霞, 柯黎明, 徐卫平, 刘鸽平
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作者单位：(南昌航空大学 航空制造工程学院, 江西 南昌 330063)
中文关键字：搅拌摩擦加工； 碳纳米管； 纯铝基复合材料； 显微组织； 硬度
英文关键字：friction stir processing; carbon nano-tubes; aluminum matrix composite; microstructure; hardness
中文摘要：用搅拌摩擦加工法制备碳纳米管增强铝基复合材料，并对其组织及硬度进行了分析。结果表明：搅拌摩擦中心区晶粒尺寸与轴肩变形区相似，晶粒比较细小；搅拌摩擦区边界的晶粒组织发生了明显的塑性变形，晶粒被扭曲拉长。碳纳米管在搅拌摩擦中心区均匀分散，和基体结合良好。碳纳米管对基材有明显的强化作用，搅拌摩擦中心区硬度在55 HV左右，是纯铝的2倍。
英文摘要：Carbon nano-tubes reinforced aluminum matrix composite was prepared by friction stir processing. The microstructure and properties of the composite were analyzed. The results show that, in the shoulder deformation zone, the fine grain is similar to that of the center of friction stir zone. On the edge of friction stir zone, the material has obvious plastic deformation and the grains are distorted and elongated. The carbon nano-tubes uniformly distribute in the centre of friction stir zone, and have good combination with aluminum matrix. The carbon nano-tubes obviously enhance the strength of matrix. The hardness of the center of friction stir zone is 55 HV, which is 2 times as high as Al matrix.