Friction and wear behavior of surface nanocrystallized aluminium alloy under dry sliding condition

The study on vulcanization fouling behavior of nanocrystalline layer

“…4 shows the variation of friction coefficient as a function of sliding time. The friction coefficient of both samples decreases initially and tends to a steady‐state value, however, the steady‐state value for the as‐treated sample is much lower than the original which may result from the increase of hardness of the nanocrystalline surface and this trend is consistent with other reports 9, 11, 25. This low‐frication coefficient surface is expected to exhibit good release performance when the vulcanized rubber compound is fished out from mold by preventing/decreasing the scratching of rubber compounds and reducing the initial knockout press.…”

“…Surface nanocrystallization is one of the techniques of surface modification which generates a nanocrystalline surface layer so that the overall properties and performance of the materials are significantly improved without changing the chemical composition. Low carbon steel,9 pure copper10 and aluminium alloys11 show a decrease in friction coefficient and improvement in wear resistance. Stainless steel, after surface nanocrystallization modification, shows an enhanced resistance of corrosion as well as wear,12 and a reduced adherence to biofilms 13.…”

Fretting wear behavior of fine grain structured aluminium alloy formed by oil jet peening process under dry sliding condition

“…The fretting wear behavior of shot peened Ti-6Al-4V showed a beneficial effect on the crack initiation and propagation [12]. The reciprocating sliding wear [6,13] and fretting wear behavior [14] of the nanocrystalline surface layer showed reduction in coefficient of friction and high wear resistance compared to coarse grain polycrystalline materials. Nanocrystalline nickel on a copper substrate produced using direct and pulse current electrodeposition showed improved tribological properties than that of the coarse grain polycrystalline nickel [15].…”

“…Fretting process involves the effects of running conditions, environmental conditions and material properties. Increasing the surface strength of the metallic materials by application of surface modification methods is expected to be the unique solution to improve the resistance against fretting and dry sliding wear behavior [6,7]. Surface strengthening can be achieved by severe surface deformation processes such as shot peening, water jet peening, laser shock peening, deep rolling, low plasticity burnishing, oil jet peening, controlled ball impact peening and ultrasonic shot peening Oil jet peening, a new surface enhancement technique is developed for inducing compressive residual stresses on the surface of the metallic materials along with the formation of ultrafine grain structure at the surface [8][9][10].…”

Research on Surface Nanocrystallization of Surfacing Layer by Pre-loading Rolling Technology

“…The material fatigue and wear is very sensitive to the surface structure and properties of the materials. The overall performance and service behavior of the materials can be improved by optimizing surface structure [3][4][5][6][7][8]. In this paper, a nanostructured surface layer was fabricated on surfacing layer by pre-load rolling technology (PLRT).…”