Article ID Journal Published Year Pages File Type
1690399 Vacuum 2013 4 Pages PDF
Abstract
To realize the effect of surface topography on tribological behaviour in microforming, the surface of a copper thin sheet was modified using ion beam irradiation equipment to change the micro-topography of the surface. The surface quality was evaluated by the surface roughness using SEM and AFM. A serial of strip drawing experiments were carried out to analyse the effect of surface modification on the tribological behaviour. Then, the modified specimens were applied to micro-cup deep drawing process of 1.1 mm in diameter. The results show that the surface roughness (Ra) decreases and many nano-crystals are induced by ion beam irradiation. The surface with many nano-crystals is helpful for storage of lubricant oil to bear high pressure. With the modified specimen, the punch load in micro-deep drawing process is lower than that with original sheet. This can be analysed by the hypothesis of the Wanheim/Bay model. The results indicate that surface modification using ion beams can be used to decrease friction in small contact area.
Related Topics
Physical Sciences and Engineering Materials Science Surfaces, Coatings and Films
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