Combined friction and wear reduction in a reciprocating contact through laser surface texturing

Looking into a laser textured piston ring-liner contact

“…In order to apply texture effectively in practice, it is vitally important to understand which combinations of these mechanisms occur and under which conditions. Recent work at Imperial College [13,[31][32][33][34][35][36] has investigated a variety of surface texture geometries in a contact closely replicating an automotive piston ring-cylinder liner pair. The relationship between the friction reduction capability of surface texture and lubrication regime was characterised in [13] for a variety of textured shapes, while in [35,37] rules for the optimum pocket width, depth and spacing was established for the best performing shape determined previously (i.e.…”

Nano Diesel Soot Particles Reduce Wear and Friction Performance Using an Oil Additive on a Laser Textured Surface

“…When the GCr15 ball is sliding, the lubricating oil stored in the micro-dimples can quickly add to the contact surface. Direct contact between surfaces can be prevented because of a steady supply of lubricating oil [27]. As is shown in Figure 13b, the Raman spectra exhibits several peaks at 615 and 664 cm −1 , which is the characteristic peak of Fe 2 O 3 and Fe 3 O 4 , respectively.…”

Micro-Bulges Investigation on Laser Modified Tool Steel Surface

“…Surface modification importance to most industrial applications which are surface dependent such as adhesion, friction, corrosion resistance and wettability [1], [3], [4]. Surface roughness plays an important role in controlling friction and wear between two contact areas during processing [3], [5], [6]. Excessive friction between contact surfaces after thousands cycles during processing produces abundant heat resulted in reduced die lifecycle [1], [7].…”

“…In some cases, surface roughness is crucial to enhance adhesion between coating materials and substrate, holding lubricant in machining process and ease component removal from die surface in forming process [1], [5], [8], [9]. Surface texture affects friction by creating resistance that prevented fluid from escaping from surface contact [3], [5]- [7].…”

“…Surface texture affects friction by creating resistance that prevented fluid from escaping from surface contact [3], [5]- [7]. Surface topography and structure influenced friction that between contact surfaces.…”