Effect of Reinforcements on the Ultraprecision Performance of SiC Reinforced Aluminium Matrix Composites

Abstract:

The experiments on ultraprecision turning of SiC reinforced aluminium composites have been done by using polycrystalloid diamond (PCD) tool with the three-dimensional cutting forces measured with a Kistler dynamometer, the quality of the machined surfaces was examined under Atom Force Microscope (AFM) and Scanning Electron Microscope (SEM) and the roughness of the machined surfaces was measured with roughometer of Talysurf-6. The experimental results show that the quality of the machined surfaces of SiC reinforced aluminium composites is predominantly controlled by the deformation mechanisms of SiC reinforcements, and the quality of the machined surfaces is better when reinforcements deform in the form of direct cutoff than in the form of pullout. The higher the volume fraction of SiC reinforcements, the worse the quality of the machined surfaces and the greater the amplitude of vibration and the average value of the cutting forces. On the same condition of volume fraction and cutting, the quality of the machined surfaces of SiC whiskers reinforced aluminium matrix composites is better than that of SiC particles reinforced aluminium matrix composites.

• Periodical: Advanced Materials Research (Volumes 154-155)
• Pages: 1342-1347
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.154-155.1342
• Online since: October 2010
• Authors: Da Zhen Wang, Pei Feng Feng, Ling You
• Keywords: Aluminum Matrix Composite (AMC), Deformation Mechanism, SiC Reinforcements, Surface Roughness (SR), Ultra-Precision Machining

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