Simulation of bio-fiber based polymer composites for frictional and specific wear rate

Sliding wear performance of thermal spray WC-based coatings has been widely studied. However, there is no systematic investigation on the influence of test conditions on wear behaviour of these coatings. In order to have a good understanding of the effect of test parameters on sliding wear test performance of HVAF-sprayed WC–CoCr coatings, ball-on-disc tests were conducted under varying test conditions, including different angular velocities, loads and sliding distances. Under normal load of 20 N and sliding distance of 5 km (used as ‘reference’ conditions), it was shown that, despite changes in angular velocity (from 1333 rpm up to 2400 rpm), specific wear rate values experienced no major variation. No major change was observed in specific wear rate values even upon increasing the load from 20 N to 40 N and sliding distance from 5 km to 10 km, and no significant change was noted in the prevailing wear mechanism, either. Results suggest that no dramatic changes in applicable wear regime occur over the window of test parameters investigated. Consequently, the findings of this study inspire confidence in utilizing test conditions within the above range to rank different WC-based coatings.

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Innovative approach to evaluate the wearing of nano TiO2 doped alumina ceramics in the light of image modelling

Journal of Tribology ◽

10.1115/1.4051904 ◽

2021 ◽

pp. 1-17

Author(s):

Partha Haldar ◽

Alok Mukherjee ◽

Tapas Kumar Bhattacharya ◽

Nipu Modak

Keyword(s):

Wear Rate ◽

Wear Track ◽

Specific Wear Rate ◽

Edge Density ◽

Alumina Ceramics ◽

Nano Tio2 ◽

Image Histogram ◽

Wide Range ◽

Density Index ◽

Sobel Edge Detection

Abstract The present research is emphasized on the microscopic observation of post wear surface of nano TiO2 doped alumina ceramics to accesses wearing by promising image processing algorithms viz. entropy analysis, Sobel edge detection technique and entropy filtered image histogram analysis in relation to the extent of doping. The experimental results of specific wear rate showed an indicator with the extent of micro fracturing of grains, ploughing of materials and debris formation on the wear track after a long wear cycles in terms of entropy level, edge density index, entropy filtered image and the nature of histogram at different doping level. The lowest value of entropy level and edge density index is shown at the level of 1 wt.% TiO2 doped alumina ceramics due to the presence of low number of granularity and microfracture grains on the wear track causes the lowering of specific wear rate. The histogram of entropy filtered image for 1 wt.% doping is more uniformly distributed with the highest frequency and lowest skewness factor over a wide range of intensity values for 1 wt.% doping.

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Tribological and thermomechanical analysis of CaO (quicklime) particulates filled ZA-27 alloy composites for bearing application

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/1464420715609196 ◽

2015 ◽

Vol 232 (1) ◽

pp. 20-34 ◽

Cited By ~ 1

Author(s):

Swati Gangwar ◽

Amar Patnaik ◽

IK Bhat

Keyword(s):

Wear Rate ◽

Normal Load ◽

Energy Dispersive Spectrometer ◽

Thermo Gravimetric Analysis ◽

Research Work ◽

Surface Profile ◽

Specific Wear Rate ◽

Gravimetric Analysis ◽

Load Range ◽

Environment Temperature

This research work investigates friction and wears behaviour of CaO filler / particulate reinforced ZA-27 alloy composites. Pin-on-disk tribometer confining to ASTM G 99 standard with EN-31 hardened steel disc was used to simulate the tribological performance experimentally. The tribological parameters were evaluated over a normal load range of 5–45 N, sliding velocity of 1.047–5.235 m/s., sliding distance of 500–2500 m, environment temperature of 25–45℃ and filler content range of 0–10 wt%. The various alloy composites were fabricated under vacuum environment by high-temperature gravity casting technique. The steady-state specific wear rate and coefficient of friction were evaluated under different boundary conditions and thereafter Taguchi design of experiment methodology was adopted to compute the experimental specific wear rate of the proposed alloy composites. The dynamic mechanical analysis and thermo-gravimetric analysis study were also performed in order to observe the thermal characteristics of the composites at higher temperature. Finally, the surface morphology of the worn samples was performed using field-emission scanning electron microscope to understand the wear mechanism prevailed at rubbing surfaces and then atomic force microscopy analysis was studied to evaluate the surface profile of the worn sample. At the end, energy-dispersive spectrometer analysis was also performed to find out the elemental compositions of the worn alloy composites.

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Water Absorption, Friction and Wear Behaviors of Polypropylene Composites Filled with Hydroxyapatite

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.733.60 ◽

2017 ◽

Vol 733 ◽

pp. 60-64

Author(s):

Munir Tasdemir ◽

Ozkan Gulsoy

Keyword(s):

Friction Coefficient ◽

Wear Rate ◽

Water Absorption ◽

Polymer Composites ◽

Friction And Wear ◽

Wear Properties ◽

Polypropylene Composites ◽

Friction And Wear Properties

In the present work, the friction and wear properties of Polypropylene (PP) based composites filled with Hydroxyapatite (HA) particles were studied. Fillers contents in the PP were 10, 20, and 30 wt%. The effects of hydroxyapatite ratio on the water absorption, friction and wear properties of the polymer composites is presented. The result showed that the addition of HA to the composite changed the water absorption, friction coefficient and wear rate.

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Desirability of Tribo-Performance of Natural Based Thermoset and Thermoplastic Composites: A Concise Review

Applied Science and Engineering Progress ◽

10.14416/j.asep.2021.07.001 ◽

2021 ◽

Author(s):

Aravind Dhandapani ◽

Senthilkumar Krishnasamy ◽

Thitinun Ungtrakul ◽

Senthil Muthu Kumar Thiagamani ◽

Rajini Nagarajan ◽

...

Keyword(s):

Friction Coefficient ◽

Wear Rate ◽

Relative Motion ◽

Operating Temperature ◽

Natural Fibers ◽

Specific Wear Rate ◽

Thermoplastic Composites ◽

Sliding Velocity ◽

Concise Review ◽

Sliding Distance

Tribology, which may be defined as an interdisciplinary subject, deals with relative motion between two or more bodies, i.e., surfaces that are interacting relatively. Thus, tribology is a science covering three vital classes, namely, 1) wear, 2) friction, and 3) lubrication. The focus of this article is to bring out the elements that are influencing the wear-resisting behavior of thermosetting and thermoplastic composites with natural-based constituents. It was also identified from the literature sources that 1) the treatments on the natural fibers acting as reinforcement and 2) the addition of fillers in resin acting as matrix could improve the wear-resisting behavior of the composites. Additionally, other conditions such as 1) sliding speed, 2) sliding velocity, 3) sliding distance, and 4) operating temperature could also influence the friction coefficient and specific wear rate of the natural-based composites.

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Investigation of the Wear Behavior of AA6082 Against Different Counterparts

10.52460/issc.2021.045 ◽

2021 ◽

Author(s):

Safiye İpek Ayvaz ◽

Mehmet Ayvaz

Keyword(s):

Wear Resistance ◽

Aluminum Alloy ◽

Wear Rate ◽

Abrasive Wear ◽

Wear Behavior ◽

Specific Wear Rate ◽

Pin On Disk ◽

Disk Method ◽

Sliding Distance ◽

Oxidation Wear

In this study, the effect of different counterparts on the wear resistance of AA6082 aluminum alloy was investigated. In tests using pin-on-disk method, 6 mm diameter Al2O3, 100Cr6 and WC-6Co balls were used as counterparts. The tests were carried out using 500 m sliding distance and 5N load. The lowest specific wear rate was measured as 7.58x10-4 mm3/Nm in WC-6Co / AA6082 couple, and the highest value was measured as 9.71x10-4 mm3/Nm in 100Cr6/AA6082 couple. In the Al2O3/AA6082 couple, the specific wear rate of the AA6082-T6 sample was determined as 8.23x10-4 mm3/Nm.While it was observed that the dominant wear type in the 100Cr6/AA6082 pair was abrasive wear, oxidation wear and oxide tribofilm were detected in the WC-6Co/AA6082 and Al2O3/AA6082 couple besides the abrasive wear.

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Specific Wear Rate of Kenaf Epoxy Composite and Oil Palm Empty Fruit Bunch (OPEFB) Epoxy Composite in Dry Sliding

Jurnal Teknologi ◽

10.11113/jt.v58.1554 ◽

2012 ◽

Vol 58 (2) ◽

Cited By ~ 5

Author(s):

Salmiah Kasolang ◽

Mohamad Ali Ahmad ◽

Mimi Azlina Abu Bakar ◽

Ahmad Hussein Abdul Hamid

Keyword(s):

Wear Rate ◽

Oil Palm ◽

Epoxy Composite ◽

Fibre Composite ◽

Specific Wear Rate ◽

Dry Sliding ◽

Empty Fruit Bunch ◽

Sliding Velocity ◽

Fiber Size ◽

Wear Tests

This paper presents an experimental investigation carried out to compare specific wear rate and surface morphology between two types of natural fibres namely kenaf and oil palm empty fruit bunch (OPEFB). Kenaf fibres were received in long fiber size and OPEFB in different sizes (100, 125, 180 and 250 μm). Both materials were mixed with the epoxy resin to produce epoxy composites. Wear tests were carried out using Abrasion Resistance Tester in dry sliding condition. These tests were performed at room temperature for different loads and at a constant sliding velocity of 1.4m/s. Based on the results, the specific wear rate of Kenaf Fibre composite starts to converge to one similar value beyond 6km distance. In the case of OPEFB epoxy composite, it was found the fiber size of 100 um has produced the highest specific wear rate.

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Dry Slide Wear Behavior of Graphite and SiC, TiO2 Filled the Unidirectional Glass-Epoxy Composites

Polymers and Polymer Composites ◽

10.1177/096739111702500302 ◽

2017 ◽

Vol 25 (3) ◽

pp. 193-198 ◽

Cited By ~ 1

Author(s):

A. Madhanagopal ◽

S. Gopalakannan

Keyword(s):

Wear Rate ◽

Coefficient Of Friction ◽

Wear Behavior ◽

Specific Wear Rate ◽

Dry Sliding ◽

Testing Time ◽

Time Duration ◽

Sem Images ◽

Unidirectional Glass ◽

The Coefficient Of Friction

This study determines the friction and the wear properties of the unidirectional glass epoxy composite with Gr, SiC TiO2 powder by using pin on disk apparatus. This tribological data is obtained in dry sliding condition for a constant sliding time of 30 minutes. Test specimens are prepared using hand lay-up process and by varying the different (2, 5, 7) percentage each of graphite and SiC, TiO2 particles addition for the combination of fiber and matrix. The tests are performed by varying the operating parameters of contact pressure (p) and velocity (v). The composites (2% 5%, and 7%) are worn by dry sliding at the steel counter face under ambient conditions. The coefficient of friction reaches maximum of 0.78 at 2 kg load, 2 m/s velocity with testing time duration of 24 min. whereas 5%, 7% sample shows the coefficient of friction 0.28, 0.25 respectively. The specific wear rate value drops to 0.79 (mm3/N-m×10−6) at 2 kg load at 2 m/s velocity for the 5% specimen. The maximum reduction in the specific wear rate at 3 kg load, 1m/s velocity is 32.7 percentages, 5.63 percentages for the 5,7 percentage specimen compared to 2% specimen for the graphite and SiC, TiO2 particle filled composite specimen respectively. The SEM images are also taken to support the results.

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Mechanical and Tribological Studies of SU-8 Composites Filled With UHMWPE and Gum Acacia Under Dry and Bovine Serum Albumin Lubricated Conditions

Journal of Tribology ◽

10.1115/1.4047585 ◽

2020 ◽

Vol 143 (1) ◽

Author(s):

Jaswant K. Hirwani ◽

Sujeet K. Sinha

Keyword(s):

Bovine Serum Albumin ◽

Wear Rate ◽

Serum Albumin ◽

Bovine Serum ◽

Normal Load ◽

Specific Wear Rate ◽

Fibrillar Structure ◽

Cross Sectional ◽

Microscopy Imaging ◽

Gum Acacia

Abstract SU-8 polymer was mixed with ultrahigh-molecular weight polyethylene (UHMWPE) particles in various weight percentages (wt%) to make composites. Uniform distribution of filler material was confirmed by optical microscopy imaging. Cross-sectional scanning electron microscopy (SEM) analysis showed the formation of fibrillar structure of UHMWPE which helped bind UHMWPE particles with SU-8 matrix. Gum acacia made a coating on the UHMWPE particles and helped in binding with the matrix. The compressive Young’s modulus and strength of the composites were found to decrease with UHMWPE filler addition. The composites were tested in ball-on-disk tribometer using 12 mm diameter stainless steel (grade 304) ball under a normal load of 20 N and sliding speed of 32 mm/s. SU-8 with 25 wt% of UHMWPE showed coefficient of friction of 0.1 and specific wear-rate of 6.27 × 10−5 mm3/Nm which were 52% and 61%, respectively, lower in comparison with those of bulk UHMWPE tested in aqueous solution of bovine serum albumin (BSA). Adding 10 wt% of gum acacia to the SU-8/UHMWPE composite had beneficial effects on the wear-rate as the specific wear-rate of this hybrid composite further dropped to 4.6 × 10−5 mm3/Nm which was 71% lower than that of bulk UHMWPE.

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