Microscopic Analysis of the Surface Morphology of Multilayer Structures of the AluminumAlloy - Silicon Type after Water Jet Cutting

The paper presents the results of an experimental work on the assessment of microscopic morphology of the surfaces obtained as a result of cutting with a Water Jet (WJ) water abrasive beam. During the tests, the following values were taken as input values: feedratevf [mm·min- 1] and mass flow rate of the abrasive material ma [g·s-1]. As constant parameters were assumed: the angle of incidence of the water-abrasive mixture stream on the workpiece material equal to 90°, the type of abrasive (garnet 80 mesh), the pressure value p [MPa] and the distance of the nozzle from the cut material l [mm]. The values disturbing the process were vibrations generated during the cutting process and motion resistance resulting from friction processes in the guides and kinematic gears. The subject of analysis were the interfacial structures of multilayer structures connected in a vulcanization process with the surface of thin-walled parts made of AW-5754 aluminum alloy. As an effect, the results describing the nature of changes in spatial parameters of surface roughness as well as parameters of skewness and kurtosis as a function of WJ technological cutting of composites materials conditions were obtained.