Fabrication of a dimple structure using a machining process on a metallic surface
by Jaharah A. Ghani; Sharudin Hassan; Mohd Nor Azam Bin Mohd Dali; Che Hassan Che Haron
World Review of Science, Technology and Sustainable Development (WRSTSD), Vol. 14, No. 2/3, 2018

Abstract: A surface texture, such as a dimple structure, can be produced through various processes like electrochemistry, electrolysis, laser and machining processes. This paper presents the fabrication of a dimple structure on an aluminium alloy 6061-T6 metallic surface using a machining process comprised of turning and milling. This fabrication was enabled with the aid of a newly-developed dynamic assisted tool for the tuning and milling processes respectively. The dynamic assisted tool that was developed was able to produce a dimple structure of various shapes and geometries in the turning process (spherical, short drop and long drop), whereas for the milling process, only a circular shape could be produced. The ranges that could be produced for the dimple structures were width of 153-999 µm, length of 964-3,261 µm; diameter of 15-30 µm; depth of 37 µm-155 µm and area ratio of 2.7-13.8%. These ranges in the size, depth, area ratio and array produced were within the ranges obtained by previous researchers to minimise friction and wear for sliding mechanical components.

Online publication date: Sat, 14-Jul-2018

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