Papers by Keyword: SiCp/Al Composite

Abstract: As the typical particle-reinforced aluminum matrix composite, SiCp/Al composite has low density, high elastic modulus and high thermal conductivity, and is one of the most competitive metal matrix composites. Grinding is the main processing technique of SiCp/Al composite, energy consumption of the grinding process provides guidance for the energy saving, which is the aim of green manufacturing. In this paper, grinding experiments were designed and conducted to obtain the energy consumption of the grinding machine tool. The Particle Swarm Optimization (PSO) BP neural network prediction model was applied in the energy consumption prediction model of SiCp/Al composite in grinding. It showed that the Particle Swarm Optimization (PSO) BP neural network prediction model has high prediction accuracy. The prediction model of energy consumption based on PSO-BP neural network is helpful in energy saving, which contributes to greening manufacturing.

Abstract: SiCp/Al composite is widely used in the aerospace, electronics and automobile industries due to its ultrahigh strength and wear resistance. Surface integrity in the machining process can be influenced by tool corner radius. A finite element model is developed by DEFORM-2D to study on the effect of tool corner radius on residual stresses, cutting force and temperature in machining SiCp/Al composite process. The results show the large corner radius can improve cutting force, but hardly influence cutting temperature. Meanwhile, value of residual stresses is influenced by tool corner radius, but distribution of residual stress is not. The larger corner radius is, the greater the curve fluctuation of residual stresses is. And the large tool corner radius can effectively improve surface residual compressive stress.

Abstract: In this paper, high volume fraction SiCp/Al composite was fabricated by pressureless technique with silicon carbide porous preform which fabricated through gel casting process. The effects of solid loading on the rheological properties of SiC slurry were discussed. High solid loading SiC slurry of 65vol% with low viscosity and high stability was fabricated. Also microstructure, flexural strength of the SiC preform and SiCp/Al composite were studied, the results showed gel casting process and pressureless infiltration technique were suitable for fabricating high volume fraction, homogeneous structure and high performance SiCp/Al composite.

Abstract: Silicon carbide particles reinforced aluminum matrix composite (abbreviated as SiCp/Al) offers excellent performance such as high specific strength and stiffness, which make it widely used in aerospace, automobile and other fields, but it is hard to be manufactured. An aluminum matrix composite reinforced with 45% volume fraction of 5μm silicon carbide particles in an A12 aluminum matrix was experimental studied by ultrasonic vibration-assisted scratch (UVAS) and traditional scratch. Cutting forces and surface topography were measured by Kistler dynamometer and SEM. The experimental results showed that the cutting forces fluctuated obviously and the axial force was larger than the tangential force during both UVAS process and traditional scratch process. Average cutting forces of UVAS process were less than those of traditional scratch process. At the same time, small chips of SiC and high surface quality were observed in the scratch surface of UVAS. These indicate that ultrasonic vibration-assisted method plays an important and effective role in reducing cutting forces and improving surface quality.