Experimental evaluation of MoS2 nanoparticles in jet MQL grinding with different types of vegetable oil as base oil

2015 ◽  
Vol 87 ◽  
pp. 930-940 ◽  
Author(s):  
Yanbin Zhang ◽  
Changhe Li ◽  
Dongzhou Jia ◽  
Dongkun Zhang ◽  
Xiaowei Zhang
Keyword(s):  
Vegetable Oil ◽  
Experimental Evaluation ◽  
Base Oil ◽  
Mql Grinding ◽  
Different Types ◽  
Mos2 Nanoparticles

Experimental evaluation of MoS2 nanosheets as lubricant additive in different types of base oil for magnesium alloy/steel pairs

2019 ◽  
Vol 6 (6) ◽  
pp. 066575 ◽  
Author(s):  
Xie Hongmei ◽  
Jiang Bin ◽  
Tang Changping ◽  
Dai Jiahong ◽  
Quan Xin ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Alloy Steel ◽  
Experimental Evaluation ◽  
Lubricant Additive ◽  
Mos2 Nanosheets ◽  
Base Oil ◽  
Different Types

Experimental Evaluation of the Lubrication Properties of the Wheel/Workpiece Interface in MQL Grinding Using Vegetable Oils

2020 ◽  
pp. 249-274
Keyword(s):  
Vegetable Oils ◽  
Experimental Evaluation ◽  
Castor Oil ◽  
Saturated Fatty Acids ◽  
Minimum Quantity Lubrication ◽  
Grinding Wheel ◽  
Workpiece Material ◽  
Base Oil ◽  
Mql Grinding ◽  
Urgent Task

Given the increasing attention to environmental and health problems caused by machining, the development of an environmentally friendly grinding fluid has become an urgent task. In this study, seven typical vegetable oils (i.e., soybean, peanut, maize, rapeseed, palm, castor, and sunflower oil) were used as the minimum quantity lubrication (MQL) base oil to conduct an experimental evaluation of the friction properties of the grinding wheel/workpiece interface. With nickel-based alloy GH4169 as workpiece material, the flood grinding and MQL grinding were selected. Experimental results indicated that castor oil MQL grinding had a friction coefficient and specific grinding energy of 0.30 and 73.47 J/mm3, which decreased by 50.1% and 49.4%, respectively, compared with flood grinding. Moreover, maize oil had the highest G-ratio of 29.15. Peanut, sunflower, and soybean oil with more saturated fatty acids, castor oil with more castor acids, and palm oil with numerous palmitic acids were suitable as lubricating fluids.

scholarly journals Comparative Study on Mechanical Properties of Sealing Grease Composed of Different Base Oils for Shield Tunnel

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 692 ◽  
Author(s):  
Xiangqian Li ◽  
Yuyou Yang ◽  
Fan Li
Keyword(s):  
Mechanical Properties ◽  
Vegetable Oil ◽  
Exponential Function ◽  
Flow Rate ◽  
Temperature Sensitivity ◽  
Mineral Oil ◽  
Shield Tunnel ◽  
Fixed Temperature ◽  
Base Oil ◽  
Base Oils

This study proposes a novel sealing grease with improved mechanical properties and environmental performance. A series of sealing grease samples were made with different base oils, including mineral oil and renewable oil (vegetable oil and lard). In this study, thermogravimetric analysis (TGA) was conducted to study the adsorption capacity of the thickener to the base oil. The fluidity of the sealing grease was also tested at different temperatures. Furthermore, an exponential function was proposed for the flow rate of the sealing grease and the temperature. Moreover, a cone penetration test was conducted to study the consistency of the sealing grease. The results indicated that the capacity of the thickener to adsorb vegetable oil was greater than that of mineral oil, but less than that of lard. Additionally, the flow rate of the sealing grease increased with an increase in temperature. At a fixed temperature, the flow rate of the sealing grease increased with the base oil content. According to the exponential function, the composition of the base oil is the key factor that determines the temperature sensitivity of the sealing grease. In addition, the sealing grease made of vegetable oil has the minimum temperature sensitivity coefficient.

Effects of a thickener structure on grease elastohydrodynamic lubrication films

2000 ◽  
Vol 214 (4) ◽  
pp. 327-336 ◽  
Author(s):  
M Kaneta ◽  
T Ogata ◽  
Y Takubo ◽  
M Naka
Keyword(s):  
Film Thickness ◽  
Direct Observation ◽  
Film Formation ◽  
Elastohydrodynamic Lubrication ◽  
Rolling Speed ◽  
Molecular Structures ◽  
Optimum Temperature ◽  
Oil Viscosity ◽  
Base Oil ◽  
Different Types

The effects of the thickener structure and base oil viscosity on the grease film formation in rolling point elastohydrodynamic contacts have been discussed on the basis of direct observation using the optical interferometry technique. Three different types of diurea greases without additives have been used as test greases. As the base oils three kinds of ether-type synthetic oils having similar molecular structures but different viscosities were used. The film behaviour of fresh greases has also been compared with that of the degraded greases. It has been found that the behaviour of grease elastohydrodynamic lubrication films is basically influenced by the thickener structure and base oil viscosity. The adhesion or deposition of the thickener on the contacting surfaces and oil starvation which affect film formation depend on the thickener structure, base oil viscosity and rolling speed. Furthermore, it has been suggested that there is an optimum temperature which gives a maximum film thickness according to the consistency of the grease.

Tribological Investigation of Nanographite Platelets as Additive in Anti-Wear Lubricant: A Top-Down Approach

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Flavio A. C. Vidal ◽  
Antonio F. Ávila
Keyword(s):  
Friction Coefficient ◽  
Friction Reduction ◽  
Wear Properties ◽  
Top Down ◽  
Base Oil ◽  
Graphene Layers ◽  
Sliding Mechanism ◽  
Wear And Friction ◽  
Different Types ◽  
Mineral Base

A top-down approach is employed to investigate the tribological effect of adding nanographite platelets (NGPs) to mineral base oil (MBO). The performance of the NGP-modified MBO was evaluated by examining the friction and anti-wear properties. Four different types of NGPs produced by two different processes were employed. The optimal NGP-modified MBO attained a significant wear and friction reduction when compared with the MBO without NGPs. The process used to exfoliate the graphite nanoplatelet samples provided better wear properties because of the graphene layers' smoother sliding mechanism. Graphene layers seeped inside the groove marks to keep the friction coefficient low.

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