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Research Paper | Mechanical Engineering | India | Volume 4 Issue 2, February 2015 | Popularity: 5.1 / 10

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Impact of Hard Material Surface Morphology on Friction and Transfer Layer Formation

M. Basavaraju, Shivakumar N V

Abstract: In manufacturing, metal is shaped both hot and cold to make technical parts. The surface quality of engineering components is determined by a variety of factors, including the state of the dies used in various manufacturing processes. The surface finish of engineering components is heavily impacted by the tribological phenomena at the die - component contact. Lubrication, die surface shape, and hardness have all been found to influence product surface finish. In this study, a pin - on - plate sliding tester was used to determine the influence of surface morphology, lubrication, and hardness on the coefficient of friction and transfer layer, which describe tribological behavior. The morphology of mild steel (EN8) plate surfaces was changed using three different surface modification methods: grinding (silicon carbide wheel polishing), shot blasting, and electric discharge machining. The surface roughness characteristics that characterize the morphology of the steel plates were measured with a three - dimensional optical profilometer. The role of hardness is investigated by sliding lead, copper, and aluminum (Al6082) pins against steel plates. Experiments were done with plate inclination angles of 1, 1.5, 2, and 2.5 degrees. The normal load was changed from 1 to 150N during the testing. Experiments were carried out in a lubricated ambient environment. A scanning electron microscope was used to investigate the creation of transfer layers on plate and pin surfaces. The coefficient of friction and the generation of transfer layers were shown to be dependent on the surface shape of the tougher surface under lubricated conditions. The quantity of transfer layer generation on surfaces appears to increase with surface roughness.

Keywords: Friction, lubrication, hardness, surface morphology and transfer layer formation

Edition: Volume 4 Issue 2, February 2015

Pages: 2482 - 2486

DOI: https://www.doi.org/10.21275/ES24318175506

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