New applications of the Rehbinder effect in tribology. A review

Савенко, В. И.; Shchukin, E. D.

doi:10.1016/0043-1648(95)06789-2

Cited by 31 publications

(4 citation statements)

References 5 publications

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“…This is because the CCESL technique has the possibility of forming a soft contact area on the metal surface in contact due to the plasticizing action of the negatively charged lubricant droplets [57]. Thus, real contact area is greater and more adhesion actions are possible.…”

Section: Lubrication Mechanism Of the Ccesl Techniquementioning

confidence: 99%

Tribological Performance and Lubrication Mechanism of Contact-Charged Electrostatic Spray Lubrication Technique

Huang

Yao

et al. 2015

Tribol Lett

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To minimize friction at the chip-tool interface and the amount of lubricant usage, a new near-dry machining technique called ''contact-charged electrostatic spray lubrication (CCESL) technique'' was proposed. The chargeability, penetrability, and wettability of lubricant droplets under CCESL condition were analyzed. The atomization and tribological performance of the CCESL technique were compared with those of the existing minimal quantity lubrication (MQL) technique under different testing conditions. The experimental results suggest that the CCESL technique considerably improves the anti-wear and anti-friction properties compared with the existing MQL technique. In addition, to understand its lubrication mechanism, the morphology and main elements of the worn surface were characterized using an optical microscope and X-ray photoelectron spectroscopy, respectively. In the CCESL technique, an ordered molecule layer which provides effective lubrication is formed on the rubbing surface as polar functional groups in the lubricant molecule are oriented. The enhanced tribological performance is attributed to the fact that the technique can provide more abundant lubricant and oxygen for the interface of frictional pairs to promote the formation of an abundant lubricating layer comprising adsorption and oxide films, which improve the worn surface quality.

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Section: Lubrication Mechanism Of the Ccesl Techniquementioning

confidence: 99%

Tribological Performance and Lubrication Mechanism of Contact-Charged Electrostatic Spray Lubrication Technique

Huang

Yao

et al. 2015

Tribol Lett

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“…As per the Rehbinder effect, active substances can diffuse in to the microcracks at the newly machined surface and prevent re-welding [33]. Smith et al [34] The literature [31,32] associates that effective cooling on the free surface of the chip can improve the chip up-curling and separation at the chip-tool interface due to the Rehbinder effect. As per the Rehbinder effect, active substances can diffuse in to the micro-cracks at the newly machined surface and prevent re-welding [33].…”

Section: Minimum Quantity Cooling Lubrication Mechanismsmentioning

confidence: 99%

Implementation of Sustainable Vegetable-Oil-Based Minimum Quantity Cooling Lubrication (MQCL) Machining of Titanium Alloy with Coated Tools

et al. 2022

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The lubrication capacity and penetration ability of the minimum quantity cooling lubrication-based strategy is linked with lubrication specific parameters (oil flow rates and air pressure), cutting conditions, and chip formation. It points out the complex selection involved in the MQCL-assisted strategy to attain optimal machining performance. Lubrication during metal cutting operations is a complex phenomenon, as it is a strong function of the cutting conditions. In addition, it also depends on the physical properties of the lubricant and chemical interactions. Minimum Quantity Lubrication (MQL) has been criticized due to the absence of cooling parts; MQCL is a modified version where a cooling part in the form of sub-zero temperatures is provided. The aim of this paper was to investigate the influence of different lubrication flow parameters under minimum quantity cooling lubrication (MQCL) when machining aeronautic titanium alloy (Ti6Al4V) using Titanium Aluminum Nitride – Physical Vapor Deposition (TiAlN-PVD) coated cutting inserts. The machining experiments on the MQCL system were performed with different levels of oil flow rates (70, 90, and 100 mL/h) and the performance was compared with the conventional dry cutting and flood cooling settings. A generic trend was observed that increasing the oil flow rate from 70—mL/h to 100 h/h improved the surface finish and reduced thermal softening at a low feed of 0.1 mm/rev. The results revealed that many tool-wear mechanisms such as adhesion, micro-abrasion, edge chipping, notch wear, built-up edge (BUE), and built-up layer (BUL) existed.

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“…(a) viscosity variation of the BO induces variation of the EHL film thickness [6][7][8]; (b) if the lubricant enters the crack, this modifies the RCF behaviour [9][10][11][12]; (c) hydrogen originated from hydrocarbon species embrittles the steel especially at the crack tip [13]; (d) the Rehbinder effect [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of lubricant additives in rolling contact fatigue

Meheux

Minfray

Ville

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part J:

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International audienceLubricant formulations for manual gear box applications are optimized for gear contacts although rolling element bearings are lubricated with the same fully formulated oil. This may cause fatigue-related damage to these bearings. Several explanations can be considered, but this work focuses on the effect of additives contained in the lubricant. Rolling contact fatigue tests were performed on a twin-disc machine. Artificial dents generated by a Rockwell penetrator were made on the faster surface in order to accelerate the fatigue phenomena. Then, pure rolling and 6.7 per cent slip (slide-to-roll ratio (SRR)) tests were performed with different lubricants (pure base oil, fully formulated oil, and base oil with detergent and anti-foam). Fatigue life results and spalling morphologies are compared. For the sample obtained with the fully formulated oil and 6.7 per cent of SRR, crack analysis was performed. Using focus-ion-beam technique, a spalled sample was milled to reveal a cross-section of a crack. Secondary electron microscopy (SEM) images were taken and energy-dispersive X-ray spectrometry (EDX) analyses along the crack were performed. Additive elements are detected up to the crack tip. Auger electron spectroscopy depth profiling was also performed in the tribofilm generated on the disc surface. The role of additives in rolling contact fatigue is discussed in the light of these results

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New applications of the Rehbinder effect in tribology. A review

Cited by 31 publications

References 5 publications

Tribological Performance and Lubrication Mechanism of Contact-Charged Electrostatic Spray Lubrication Technique

Tribological Performance and Lubrication Mechanism of Contact-Charged Electrostatic Spray Lubrication Technique

Implementation of Sustainable Vegetable-Oil-Based Minimum Quantity Cooling Lubrication (MQCL) Machining of Titanium Alloy with Coated Tools

Effect of lubricant additives in rolling contact fatigue

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