Investigation of the effect of CuO and AL₂O₃ nanolubricants on the surface roughness in the forging process of aluminum alloy

Abstract

Lubrication is an essential factor in the metal forming processes such as forging, since it leads to reducing friction at contact surfaces and increasing the surface quality of the forged parts. In order to create desirable tribological properties in the base lubricants, various metal oxide nanoparticles are mostly used as additives. In the present study, the effects of the nanolubricants made by copper oxide (CuO) and alumina (AL2O3) nanoparticles on the surface quality of the forging process have been investigated. The effects of the nanolubricants have been compared with the graphite as a conventional lubricant. Upsetting forging operation of a ring shape workpiece was used for evaluating the lubricants. Experiments were designed and analyzed using Taguchi method and analysis of variance. Results show that the nanolubricants cause a significant improvement on the surface roughness compared to conventional lubricants. Best condition is obtained when 0.8 wt% of CuO nanoparticles is added in paraffin lubricant. Compared with the case of base lubricants with no additives, roughness reduced by 41% and 33% for paraffin and oil10, respectively. Also, the surface roughness decreased by 496% and 235% compared with dry graphite powder and paraffin with 25% graphite, correspondingly.

Inorganic nanomaterial lubricant additives for base fluids, to improve tribological performance: Recent developments

“…In this process, nanoparticles are deposited on the worn friction surface and fill the scars and grooves to decrease wear. A study into how CuO and Al 2 O 3 nanoparticle-based nano-lubricants affect the surface quality during the formation process found that nano-lubricants can better improve the surface roughness than traditional lubricants [154]. Suspensions of surface-modified CuO nanoparticles in bio-based lubricants exhibit considerable extremepressure properties in terms of the load wear index and low-cylinder liner wear, owing to their surfacerepairing effect [145].…”

Performance Comparative of Modified Jatropha Based Nanofluids in Orthogonal Cutting Process

“…8, SE observed the longest tool-chip length (376.8 µm) as compared to the other studied MJOs. This situation was described by the shorter length of the carbon chain hence, resulted in a weaker adsorption durability between the interfaces of the tool and chip 35) . This condition was confirmed that the lubricant film of SE was completely broken and could not sustain the force acting between the tool and chip.…”

Metal-containing nanomaterials as lubricant additives: State-of-the-art and future development

“…The study of the effects of the nanolubricants made of CuO and Al 2 O 3 NPs on the surface quality of the forging process demonstrated that nanolubricants significantly improve surface roughness compared to conventional lubricants [198]. Suspensions of surfacemodified CuO NPs in bio-based lubricant exhibited high EP characteristics in terms of load wear index and low cylinder liner wear owing to the surface mending effect of NPs [185].…”