Friction and Wear Properties of Sintered Sulfur-Containing High-Speed Steels at Elevated Temperature

In this study, reduced graphene oxide (rGO) nano platelets were used as an additive to enhance friction and wear properties of oil-based lubricants by preparing three samples at 0.01% w/w, 0.05% w/w, and 0.1% w/w concentrations. To analyze the direct effect of rGO nano platelets on tribological properties, 99.9% pure oil was used as a liquid lubricant. A comparative tribological study was done by performing a ball-on-disk wear test in situ under harsh conditions, which was further analyzed using a non-contact 3D optical profilometer. Morphological evaluation of the scar was done using transmission and scanning electron microscopy (TEM, SEM) at micro and nano levels. The lubricants’ physical properties, such as viscosity and oxidation number, were evaluated and compared for all samples including pure oil (control sample) as per ASTM standards. Findings of all these tests show that adding rGO nano platelets at 0.05% w/w showed significant reduction in friction at high speed and in wear up to 51.85%, which is very promising for increasing the life span of moving surfaces in machinery. Oxidation and viscosity tests also proved that adding rGO nano platelets to all samples does not sacrifice the physical properties of the lubricant, while it improves friction and wear properties.

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Comparison of the friction and wear properties of titanium and oxidised titanium in dry sliding against sintered high speed steel HS18-0-1 and against C45 carbon steel

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2005.02.113 ◽

2005 ◽

Vol 164-165 ◽

pp. 868-875 ◽

Cited By ~ 11

Author(s):

S. Król ◽

Z. Zalisz ◽

M. Hepner

Keyword(s):

Carbon Steel ◽

High Speed ◽

Friction And Wear ◽

High Speed Steel ◽

Dry Sliding ◽

Wear Properties ◽

Friction And Wear Properties

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Study on Friction and Wear Properties of Pantograph Strip/Copper Contact Wire for High-Speed Train

The Open Mechanical Engineering Journal ◽

10.2174/1874155x20140501005 ◽

2014 ◽

Vol 8 (1) ◽

pp. 125-128 ◽

Cited By ~ 1

Author(s):

Tao Ding ◽

Wenjing Xuan ◽

Qiudong He ◽

Hao Wu ◽

Wei Xiong

Keyword(s):

Wear Rate ◽

Electric Current ◽

High Speed ◽

Friction And Wear ◽

Optical Microscope ◽

Wear Properties ◽

Contact Wire ◽

Arc Erosion ◽

The Coefficient Of Friction ◽

Friction And Wear Properties

A series of experiments on friction and wear properties of carbon strip rubbing against copper contact wire is performed on high-speed friction and wear tester with electric current. The results show that the friction coefficient is generally maintained between 0.24 and 0.37. In the absence of electric current, the coefficient of friction is higher than that in the presence of electric current. The wear rate of carbon strip materials is generally not more than 0.014g/km. In particular, the wear rate under the electric current of 240 A is 14 times more than that in the absence of electric current. By observing the scar of worn surface with optical microscope, it can be found that there are obvious slip scars and arc erosive pits. The dominated wear mechanisms are abrasive wear and arc erosion in electrical sliding frictional process.

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The Friction and Wear Properties of VC Coating by TD Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.33.61 ◽

2010 ◽

Vol 33 ◽

pp. 61-65 ◽

Cited By ~ 2

Author(s):

Chao Zheng Zhou ◽

De Jun Kong ◽

Yu Feng Yan

Keyword(s):

Crack Growth ◽

Wear Mechanism ◽

High Speed ◽

Friction And Wear ◽

Cold Working ◽

Mutual Influence ◽

Wear Properties ◽

Fatigue Wear ◽

Friction And Wear Properties ◽

Surface Morphologies

VC coating was prepared on the surface of Cr12MoV cold working die steel by TD process, and its friction and wear properties were researched with HSR-2M type high-speed reciprocating friction and wear tester, the effects of load on friction and wear properties were discussed, and the wear surface morphologies were observed with SEM. The experimental results shown that fatigue wear and adhesive wear are mainly wear mechanism of VC coating, and the different parts have an influence on wear mechanism; When cracks occurs, the crack growth is the combined result of mutual influence of elastic-plastic crack growth and fatigue crack growth; There is no relationship between friction coefficient and load, and the wear rate increases with the load.

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Tribological behavior and morphology of PTFE particulate-reinforced POM matrix composites

Journal of Polymer Engineering ◽

10.1515/polyeng-2016-0037 ◽

2017 ◽

Vol 37 (3) ◽

pp. 227-237 ◽

Cited By ~ 1

Author(s):

Qi Liu ◽

Wei Luo ◽

Shengtai Zhou ◽

Huawei Zou ◽

Mei Liang

Keyword(s):

Wear Resistance ◽

High Speed ◽

Friction And Wear ◽

Thermodynamic Characteristics ◽

Special Focus ◽

Wear Properties ◽

Scanning Calorimetry ◽

Sliding Speed ◽

Friction And Wear Properties ◽

Ptfe Composites

Abstract The friction and wear properties of polyoxymethylene/polytetrafluoroethylene (POM/PTFE) composites were investigated by using a block-on-ring friction tester and special focus was paid to the effect of weight average molar mass (Mw) of POM. To study the thermodynamic characteristics and wear mechanism of composites, differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were used. Results showed that friction and wear properties of the composite blends were strongly affected by the Mw of POM and the loading fractions of PTFE. POM/PTFE composites with lower Mw of POM owned better wear resistance abilities under a high-speed sliding regime, which resulted from the effective lubrication of transferred wear debris under a relatively high sliding speed. However, the transfer layer on the counterface could be easily peeled off under the low sliding speed, resulting in higher wear rate of POM/PTFE composites with lower Mw of POM. POM and its composites with high Mw showed comparative high friction levels, related to the strong adhesion between the resin and the steel counterpart. DSC analysis showed that POM with lower Mw had higher crystallinity, which was beneficial to the improvement of wear resistance in a high-speed sliding condition.

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