Effect of Stirring Friction Machining on the Properties and Process of Silicon Carbide Aluminum Composite Materials
Study the preparation of silicon carbide aluminum composite materials using different stir friction machining processes,with the aim of utilizing the solid state forming technology of stir friction machining to solve the problem of non dense and uneven distribution of silicon carbide particles in the aluminum matrix.Using different feed rates,stir friction machining was performed on silicon carbide aluminum composite materials to prepare silicon carbide aluminum composite materials with a silicon carbide content of 15％.The microstructure and performance of the samples were observed and tested.The experimental results show that at a feed rate of 600mm/min,a dense internal structure,uniform distribution of silicon aluminum carbide,a density of 2.85g/cm3,and thermal expansion coefficient of was obtained 19.6×10-6～23.0×l0-6K-1,a silicon carbide aluminum composite material with a maximum tensile strength of 78MPa and an elongation of 18％after fracture.The increase in feed rate is not conducive to the dense and uniform distribution of silicon carbide particles in the aluminum matrix,but also increases the thermal expansion coefficient of the composite material.The fracture morphology of silicon carbide aluminum composite material exhibits the characteristics of ductile fracture and has strong plastic deformation ability.
stirring friction machiningsilicon aluminum carbidemicrostructurecoefficient of thermal expansion
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NSTL
万方数据
维普
