Analysis of the Influence of the Number of Burnishing Passes on the Geometric Structure of Aluminium Composites Surface

Abstract

The paper presents the results of burnishing tests of composites based on AlSi9Mg aluminum alloy matrix, reinforced with Saffil ceramic fibers and silicon carbide particles. The tested material was produced at the Wroclaw University of Science and Technology. The tested materials were turned and then ball burnished. After each subsequent burnishing pass, the surfaces were measured by contact and the roughness parameters were calculated. It has been found that it is possible to obtain the Sa roughness of composites thanks to burnishing at the level of 0.1 µm. The paper shows that for each material there is an optimal and limit number of passes, which guarantees the lowest roughness for a fiber-reinforced composite these are 4 passes, and for a composite reinforced with SiC particles 5 passes. The research showed that the reduction of the roughness peaks of composites after burnishing is definitely greater than that of the valleys. The research presented in the article broadens the knowledge of aluminum composites burnishing.

Dry and Oil Mist Milling of Aluminium Matrix Composite Reinforced With Saffil Fibres

“…In addition, the wide variety of composite materials, which differ in matrix material, reinforcement, reinforcement shape and arrangement, as well as volumetric content of the reinforcement, makes it difficult to compare published research results and relate them to a specific newly designed composite material. The results presented in this paper are a continuation of studies on the machinability of Al/Al2O3f composite presented in [9,23,28].…”