A Pin-On-Disc Study of Airborne Wear Particles from Dry Sliding Wheel-Rail Contacts

2016 ◽  
Author(s):  
H. Liu ◽  
U. Olofsson ◽  
L.T.I. Jonsson ◽  
P.G. Jönsson
Keyword(s):  
Dry Sliding ◽  
Wear Particles ◽  
Pin On Disc

scholarly journals Dry Sliding Behavior of an Aluminum Alloy after Innovative Hard Anodizing Treatments

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3281
Author(s):  
Chiara Soffritti ◽  
Annalisa Fortini ◽  
Anna Nastruzzi ◽  
Ramona Sola ◽  
Mattia Merlin ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Substrate ◽  
Dry Sliding ◽  
Aluminum Oxides ◽  
Wear Rates ◽  
Anodic Aluminum ◽  
Hard Anodizing ◽  
Pin On Disc ◽  
Diffuse Reflectance Infrared ◽  
Wear Tests

This work evaluates the dry sliding behavior of anodic aluminum oxides (AAO) formed during one traditional hard anodizing treatment (HA) and two golden hard anodizing treatments (named G and GP, respectively) on a EN AW-6060 aluminum alloy. Three different thicknesses of AAO layers were selected: 25, 50, and 100 μm. Prior to wear tests, microstructure and mechanical properties were determined by scanning electron microscopy (VPSEM/EDS), X-ray diffractometry, diffuse reflectance infrared Fourier transform (DRIFT-FTIR) spectroscopy, roughness, microhardness, and scratch tests. Wear tests were carried out by a pin-on-disc tribometer using a steel disc as the counterpart material. The friction coefficient was provided by the equipment. Anodized pins were weighed before and after tests to assess the wear rate. Worn surfaces were analyzed by VPSEM/EDS and DRITF-FTIR. Based on the results, the GP-treated surfaces with a thickness of 50 μm exhibit the lowest friction coefficients and wear rates. In any case, a tribofilm is observed on the wear tracks. During sliding, its detachment leads to delamination of the underlying anodic aluminum oxides and to abrasion of the aluminum substrate. Finally, the best tribological performance of G- and GP-treated surfaces may be related to the existence of a thin Ag-rich film at the coating/aluminum substrate interfaces.

Effect of Sliding Speed on Tribological Properties of Microwave Sintered Copper-Graphite Composites

2014 ◽  
Vol 592-594 ◽  
pp. 1305-1309 ◽  
Author(s):  
K. Rajkumar ◽  
S. Aravindan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dry Sliding ◽  
Graphite Layer ◽  
Sliding Speed ◽  
Graphite Content ◽  
Sintered Copper ◽  
Pin On Disc ◽  
Graphite Composites ◽  
Scanning Electron

Effects of graphite content, and sliding speed on the tribological characteristics of copper-graphite composites under dry sliding condition were evaluated using a pin-on-disc tribometer. The worn surfaces of the composites were analyzed through Scanning Electron Microscopy (SEM). The experimental results revealed the improvement in wear resistance with increasing graphite content. The friction coefficient is also gradually decreasing upto 25 vol% graphite. Sliding speed has an effect on copper (5-15 vol%) graphite composites where as sliding speed has no effect in copper-(20-30 vol%) graphite composites. This difference is attributed to availability of self-lubricating graphite layer at the contact zone.

Dry Sliding Wear of Unidirectional Short Castor Oil Fiber Reinforced Epoxy Composite

2019 ◽  
Vol 969 ◽  
pp. 140-145
Author(s):  
G.V. Jagadeesh ◽  
J. Satish ◽  
Egala Rajesh ◽  
Gangi Srinivasu
Keyword(s):  
Castor Oil ◽  
Sliding Wear ◽  
Natural Fiber ◽  
Influential Factor ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Fiber Reinforced ◽  
Application Range ◽  
Pin On Disc ◽  
Full Factorial

The application range of natural fiber composites are increasing rapidly in several engineering areas. Unidirectional short castor oil fiber reinforced epoxy composites are fabricated using hand layup process with 40 vol% and 5mm length. Dry sliding wear tests are conducted using pin on disc tribometer. Applied loads are 15, 30 & 45N and track diameters were kept at 100, 110 and 120mm to achieve sliding distances of 1000, 2000 and 3000m respectively with adjustment of running times 6.5, 12 and 16 minutes at speed of 500 RPM. Full factorial DoE is employed and influence of each parameter on amount of wear, CoF and temperature are studied using ANOVA. It is found that load is the highly influential factor affecting amount of wear, CoF and temperature followed by sliding distance and other factors. Also, regression models are developed with good fit. The developed models predicted the results with 0-8 % error.

Study of Dry Sliding Wear and Immersion Corrosion on Al 5083 Reinforced With MWCNT, MoB, and Ni

2020 ◽  
Vol 8 (2) ◽  
pp. 38-51
Author(s):  
Sajeeb Rahiman ◽  
Robinson Smart
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Multiwalled Carbon ◽  
Immersion Corrosion ◽  
Alloy Material ◽  
Molybdenum Boride ◽  
Pin On Disc ◽  
Corrosion Behaviors

Dry sliding wear and immersion corrosion behaviors of Al 5083-based hybrid composite reinforced with multiwalled carbon nanotube (MWCNT), Molybdenum boride (MoB) and nickel (Ni) are studied with different weight percentages. The reinforcement weight percentages of MWCNT ranges from 0 to 1.5, that of MoB from 1 to 4 and for Ni from 2 to 8. Dry sliding wear behavior at room temperature is studied using Pin on Disc by varying the sliding distances from 500 to 2000m, load from 10 to 40 N and sliding velocity from 0.25 to 1.75m/s. The wear studies revealed that there is a considerable decrease in wear rate for composites than the alloy material with increase in %wt of reinforcements for all test parameters. The worn surface analysis revealed that there are two types of wear mechanisms namely abrasive and adhesive. The uniform immersion corrosion tests also showed decreasing rate with increase in reinforcements.

A pin-on-disc simulation of airborne wear particles from disc brakes

Wear ◽  
2010 ◽  
Vol 268 (5-6) ◽  
pp. 763-769 ◽  
Author(s):  
Jens Wahlström ◽  
Anders Söderberg ◽  
Lars Olander ◽  
Anders Jansson ◽  
Ulf Olofsson
Keyword(s):  
Wear Particles ◽  
Disc Brakes ◽  
Pin On Disc

The effect of ceramic tribo-elements on friction and wear of smooth steel surfaces

2018 ◽  
Vol 233 (3) ◽  
pp. 456-465
Author(s):  
Andrzej Dzierwa ◽  
Pawel Pawlus ◽  
Rafal Reizer
Keyword(s):  
White Light ◽  
Wear Debris ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Volume ◽  
Dry Sliding ◽  
Pin On Disc ◽  
Optical Profilometer ◽  
42Crmo4 Steel ◽  
Steel Surfaces

The pin-on-disc dry sliding friction and wear experiments have been made on 42CrMo4 steel in contact with Si3N4, SiC, WC, Al2O3, and ZrO2 ceramic balls. The tests were carried out at sliding speeds of 0.16 m/s, 0.24 m/s, and 0.32 m/s. During the tests, the friction force was monitored as a function of time. Discs and balls wear was measured after the tests using a white light interferometer Talysurf CCI Lite and Altisurf 520 optical profilometer with a CL1 confocal probe. To decrease variations in the experimental results, during the tests, wear debris was continuously removed from the disc surfaces. It was found out that with Al2O3 counterpart the wear volume of the steel discs was the largest. However, the largest wear volume of the balls was observed for Si3N4 ceramic balls.

Dry Sliding Friction and Wear Behaviour of Reinforced Hybrid Composites of Uniaxial Glass Fiber with Silicon Carbide, Aluminium Oxide and Graphite

2016 ◽  
Vol 852 ◽  
pp. 411-415
Author(s):  
T. Narendiranath Babu ◽  
Prasham Jain ◽  
Bipin Kumar Sharma
Keyword(s):  
Silicon Carbide ◽  
Glass Fiber ◽  
Glass Fibre ◽  
Hybrid Composite ◽  
Friction And Wear ◽  
Hybrid Composites ◽  
Aluminium Oxide ◽  
Wear Behaviour ◽  
Dry Sliding ◽  
Pin On Disc

In recent years, both industrial and academic world are focussing their attention towards the development of sustainable composites, reinforced with fibres. In particular, among the fibres that can be used as reinforcement, the uniaxial glass fiber ones represent the most interesting for their properties. The aim of this work is to illustrate the results of friction and wear behaviour of uniaxial glass fibers with silicon carbide, aluminium oxide and graphite as the fillers. Moreover, its main manufacturing technologies have been described. The major component of these hybrid composite is uniaxial glass fibre with Epoxy LY556 (Resin). Hardener HY951 is used for hardening and support. Resin + Hardener are mixed in the ratio 10:1 and the mixture made up is called Matrix. Test materials of glass Fibre with varying compositions of 15% Al2O3 + SiC and glass fibre with varying compositions of 15% Graphite + SiC have been prepared by applying the matrix on glass cloth which is wrapped around the mandrel. The samples were tested in a pin-on-disc machine to determine the friction and wear losses. Further, the samples were tested on a pin-on-disc machine and frictional characteristics were monitored by varying speed and loads. Thus, the friction and wear characteristics have also been found out for the two specimens. From the experimental test results, it is observed that Al2O3 +Sic exihibits lower wear loss than SiC + Graphite under dry sliding conditions. Based on the observations, this hybrid composite are recommended to the manufacturing of the aircraft structures.

A pin-on-disc investigation of novel nanoporous composite-based and conventional brake pad materials focussing on airborne wear particles

2011 ◽  
Vol 44 (12) ◽  
pp. 1838-1843 ◽  
Author(s):  
J. Wahlström ◽  
D. Gventsadze ◽  
L. Olander ◽  
E. Kutelia ◽  
L. Gventsadze ◽  
...  
Keyword(s):  
Wear Particles ◽  
Brake Pad ◽  
Pin On Disc

scholarly journals Dry sliding wear performance of AA7075/MoS2 composite materials

2021 ◽  
Vol 9 ◽  
Author(s):  
R. Kousik Kumaar ◽  
◽  
K. Somasundara Vinoth ◽  
Kavitha M ◽  
◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Wear Rate ◽  
Response Surface ◽  
Sliding Wear ◽  
Specific Wear Rate ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Sliding Velocity ◽  
Molybdenum Disulphide ◽  
Pin On Disc

This article aims in exploring the dry sliding wear performances on the aluminum (AA7075) metal matrix composites reinforced with molybdenum disulphide which is a solid lubricant using response surface methodology (RSM). Specific Wear Rate (SWR) for the AA7075 pure alloy, AA7075+2wt% molybdenum disulphide and AA7075+4wt% molybdenum disulphide were measured according to ASTM G99 standards in pin-on-disc apparatus. Design of experiments was selected with changed parameters like the varying percentage of molybdenum disulphide (%), applied load (N), and sliding velocity (m/s) based on Central Composite Design in response surface methodology considering them as continuous factors. Experiments for the specific wear rate of pure alloy and the composites were conducted. The volume loss was measured using the pin-on-disc apparatus from which the specific wear rate value was calculated. The obtained results are analyzed and a mathematical model was formulated using the response surface methodology. The optimum level parameters for the specific wear rate has been identified and the results of the experiment specify that the sliding velocity and molybdenum disulphide percentage have a substantial role in controlling the wear behaviour of composites when compared with the other parameter. The optimum condition for the specific wear rate was identified and experimented with for studying the result.

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