Wear Characteristics of Magnetorheological Fluid under Boundary Lubrication

2009 ◽  
Vol 79-82 ◽  
pp. 83-86 ◽  
Author(s):  
Jung Woo Sohn ◽  
Seung Bok Choi ◽  
Chul Hee Lee ◽  
Myeong Woo Cho
Keyword(s):  
Boundary Lubrication ◽  
Normal Load ◽  
Wear Test ◽  
Mr Fluid ◽  
Wear Characteristics ◽  
Equipment Wear ◽  
Pin On Disk ◽  
Worn Surface ◽  
Sliding Distance ◽  
Microscopic Surface

This experimental investigation presents wear characteristics of magnetorheoloigcal (MR) fluid under boundary lubrication contact condition. Three different specimens; aluminum, copper and steel pins are prepared and wear test is performed under consideration of several operational factors such as normal load, sliding distance, and sliding speed by using pin-on-disk test equipment. Wear rate and friction coefficients of the MR fluid are experimentally evaluated with respect to the sliding ranges. Microscopic surface and roughness changes of the worn surface of pin specimens are also analyzed by using the scanning electron microscope (SEM). In addition, Energy Dispersive X-ray Spectroscopy (EDS) analysis is conducted and chemical changes are investigated.

Investigation on Wear Behavior at High Temperature of Smooth and Bionic Non-Smooth Samples

2012 ◽  
Vol 157-158 ◽  
pp. 1628-1631
Author(s):  
Xiao Dong Yang ◽  
Zhuo Juan Yang ◽  
You Quan Chen
Keyword(s):  
High Temperature ◽  
Wear Mechanism ◽  
High Speed ◽  
Room Temperature ◽  
Wear Behavior ◽  
High Speed Steel ◽  
Wear Test ◽  
Test Method ◽  
Wear Characteristics ◽  
Pin On Disk

By using pin-on-disk wear test method, the wear behavior of W9Gr4V high speed steel with smooth and non-smooth concave samples which treated by laser texturing technology was investigated between room temperature and 500 . It was found that the anti-wear ability of the non-smooth concave samples was increased more than that of the smooth ones and the anti-wear ability of the non-smooth samples was evident than the smooth ones at temperature increasing. In this paper, the anti-wear mechanism of non-smooth concave samples and wear characteristics with smooth and non-smooth samples in high-temperature were analyzed.

Friction and Wear Performance of Double Fraction Palm Olein Lubricant Using Pin-on-Disk Tribometer

2014 ◽  
Vol 554 ◽  
pp. 396-400 ◽  
Author(s):  
Samion Syahrullail ◽  
Noorawzi Nuraliza
Keyword(s):  
Aluminum Alloy ◽  
Wear Rate ◽  
Friction And Wear ◽  
Palm Olein ◽  
Normal Load ◽  
Pure Aluminum ◽  
Wear Performance ◽  
Sliding Speed ◽  
Pin On Disk ◽  
Worn Surface

In the present of analysis, the wear rate and friction coefficient of various material is investigated and it were compared below the result of sliding speed wherever the equipment pin on disk machine has been used. Experiments were carried out with 2 totally different pins fabricated from aluminum alloy (AA5083) and pure aluminum (A1100). Experiments were conducted at normal load in step with according to testing, 10 N with totally different sliding speed 1, 3, 5 m/s ,continuous flow lubricating substance, double fraction palm olein (DFPO). The result shows that the material from pure aluminum higher material compared to the aluminum alloy in sliding condition. The morphology of the worn surface was ascertained using high optical research. The magnitude of the friction constant and wear rate are totally different in material depending on the speeds and additionally material.

scholarly journals Wear Characteristics of 22MnB5 Boron Steel under Friction Micro Pin-on-Disks Test

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Mohd Fairuz Rashid ◽  
◽  
Hadzley Abu Bakar ◽  
Abdul Aziz Adam ◽  
Mohd Basri Ali ◽  
...  
Keyword(s):  
High Strength ◽  
Boron Steel ◽  
Wear Area ◽  
Wear Characteristics ◽  
Friction Resistance ◽  
Low Weight ◽  
Pin On Disc ◽  
Pin On Disk ◽  
Worn Surface ◽  
Hardening Heat Treatment

22MnB5 Boron Steel can be considered as emerged material for high strength and low weight application. This material potentially used in abrasive condition such as cutting tool or brake pad where high friction resistance applies. In this study, the wear characteristics of 22MnB5 was investigated under the frictional tests via micro pin-on-disk. 22MnB5 Boron Steel was prepared the form of round shape within the size of 2.6 mm thickness and 12 mm diameter by using laser cutting. 4 different samples were tested namely blank (sample A), self-hardening heat treatment (sample B), 60 HRC hot stamped (sample C) and 70 HRC hot stamped (sample D). The results show that Coefficient of Friction (COF) increased as the hardness of 22MnB5 decreased. Low COF of 0.2114 recorded for sample D with 70 HRC hardness. The COF increased to 0.24, 0.29 and 0.3 when sample C (60 HRC), sample B (52 HRC) and sample A (45.5 HRC) applied respectively. For pin-on disc test, worn area decreased as the hardness increased. 22MnB5 that prepared with the highest hardness of 70 HRC presented smallest wear area of 700 µm x 2400 µm. It is followed by 800 µm x 2400 µm, 1000 µm x 2400 µm, 1600 µm x 2800 µm, when sample C, B and A were scratched. Observation on the worn surface revealed delamination of 22MnB5 surface in the form of fragmented flaking debris.

The Effects of Load and Velocity on Friction and Interface Temperature of CGRP Sliding Against Smooth Stainless Steel

2006 ◽  
Author(s):  
B. F. Yousif ◽  
N. S. El-Tayeb ◽  
T. F. Yusaf
Keyword(s):  
Stainless Steel ◽  
Experimental Tests ◽  
Interface Temperature ◽  
Direction Parallel ◽  
Friction Forces ◽  
Temperature Characteristics ◽  
Chopped Strand Mat ◽  
Pin On Disk ◽  
Worn Surface ◽  
Sliding Distance

This paper presents an experimental investigation to study friction and interface temperature characteristics of chopped strand mat fiberglass (type-R) reinforced polyester (CGRP) sliding against smooth stainless steel. Pin-on-disk (POD) apparatus is used to perform the experimental tests under dry sliding condition at room temperature. Several parameters are considered, namely load (30, 60 & 90N), sliding velocity (2.8, 3.52 & 3.9m/s) and sliding distance (0–2.51km). Three different orientations of chopped strand mat with respect to sliding direction, Parallel (P), Anti-parallel (AP) and Normal orientations (N) are investigated. Continuous measurements of friction forces using strain gauges, and interface temperatures using infrared thermometer are performed. In addition, Scanning electron microscopy (SEM) is used to study the worn surface to verify the results. Experimental results show that specimen’s orientations and the tested parameters play a major role in controlling friction and interface temperature characteristics of the CGRP/stainless steel. Maximum friction coefficient was taken place in AP orientation at 3.5 m/s and 2.5km, which was about 0.6. Although, AP-orientation had higher friction interface temperature in comparing to P and N-orientations, which was about 48°C at 3.9m/s and 2.5km.

Wear Characteristics of Metals Using Disk on Disk Type Wear Test Rig

2005 ◽  
Author(s):  
K. Hiratsuka ◽  
T. Yoshida
Keyword(s):  
Contact Time ◽  
Adhesive Wear ◽  
Wear Test ◽  
Test Rig ◽  
Wear Characteristics ◽  
Dissimilar Metal ◽  
Emery Paper ◽  
Type Test ◽  
Pin On Disk ◽  
Disk Test

Wear of metals is influenced by many factors such as material, surrounding atmosphere and sliding conditions. Besides these factors, type of the wear test also has a significant effect on wear results. For example, when pin on disk test rig is used, wear of disk is usually more than that of pin [1]. This is because the contact time of each specimen is asymmetric. In this case, the transfer particle at the tip of the pin protects pin against wear. So the wear of dissimilar metals depends on the pin-disk combination. In order to fully characterize the adhesive wear, we have developed a disk on disk type test rig [2]. In this rig, the circumferential surfaces of the two identical disks are in sliding contact thereby resulting in a symmetrical contact. In this paper, the wear characteristics of ten different metals sliding against emery paper as well as against themselves have been presented along with the wear of 43 dissimilar metal combinations.

Effect of the content of silane-functionalized boron carbide on the mechanical and wear performance of B4C reinforced epoxy composites

2021 ◽  
pp. 095400832110311
Author(s):  
Sunny Bhatia ◽  
Sabah Khan ◽  
Surjit Angra
Keyword(s):  
Wear Resistance ◽  
Boron Carbide ◽  
Compression Strength ◽  
Normal Load ◽  
Impact Resistance ◽  
Wear Test ◽  
Fracture Mechanisms ◽  
Friction Behavior ◽  
Pull Out ◽  
Sliding Distance

This article presents the mechanical, physical, and tribological properties of the boron carbide (B4C) reinforced epoxy matrix composites (BEMCs). The BEMC samples were prepared with various B4C concentration of 0%, 1%, 2%, 3%, and 5%. B4C particles were treated with a silane coupling agent to ensure efficient adhesion with epoxy. The influence of a range of parameters (particle loading, sliding speed, sliding distance, and normal load) on the wear and friction behavior of BEMCs were evaluated by conducting wear tests under dry sliding conditions on a pin-on-disc wear test set-up. The addition of B4C to the epoxy polymer improved the wear resistance of the composites. Maximum wear resistance and coefficient of friction were observed for the composite with the highest percentage of B4C (5%). The specific wear rate was reduced on increasing load and sliding distance and increased with the sliding velocity. Mechanical properties including compression strength, flexural strength, and impact energy, along with physical properties such as density and hardness, were also evaluated. B4C particles improved the hardness, density, flexural and compression strength, and impact resistance of the composites. Scanning electron microscope (SEM) analysis of the worn-out surfaces and flexural fractured surfaces was carried out to predict the possible wear and fracture mechanisms. Micro-ploughing, abrasion, and adhesion were the wear mechanisms in BEMCs. Under the flexural loads, particulate de-bonding, pull-out, and brittle fracture of the matrix were the governing failure mechanisms.

Friction and Wear Characteristics of SiC and Si3N4 Ceramics Against ZrO2 Ceramic under Dry Friction

2007 ◽  
Vol 280-283 ◽  
pp. 1319-1322 ◽  
Author(s):  
X. Tian ◽  
Bin Lin ◽  
W.L. Zhang
Keyword(s):  
Dry Friction ◽  
Friction And Wear ◽  
Normal Load ◽  
Test Duration ◽  
Wear Characteristics ◽  
Wear Rates ◽  
The Coefficient Of Friction ◽  
Pin On Disk ◽  
Wear Maps ◽  
Friction And Wear Characteristics

The friction and wear of the silicon carbide (SiC) and hot pressed silicon nitride (Si3N4) against zirconia (Y–TZP) sliding under dry friction and room temperature conditions were investigated with pin-on-disk tribometer at sliding speed of 0.56 m·s-1 and normal load of 50 N, 80 N and 120 N, respectively. It was found that, the coefficient of friction and wear rate are dependent on the test duration as well as the normal load. Through analyzing and comparing, the wear rates of the two frictional couples both are in the 10-6 mm3 (N·m)-1. Based on the variety regulation of the wear maps, the wear mechanisms of the two couples were analyzed. Between the two couples, the friction and wear characteristics of the SiC/ZrO2 couple are better than the Si3N4/ZrO2 couple’s.

Effect of Linear Sliding Speed on Wear Behavior of Al2O3/TiC Ceramic Composite and Diamond Slicing Blade

2014 ◽  
Vol 1025-1026 ◽  
pp. 292-297
Author(s):  
Witsarut Penglao ◽  
Luangvaranunt Tachai ◽  
Boonrat Lohwongwatana
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Wear Behavior ◽  
Specific Wear Rate ◽  
Initial State ◽  
Sliding Speed ◽  
Pin On Disk ◽  
Worn Surface ◽  
Sliding Distance

Pin-on-disk technique was used as a tool to study the tribological properties of contacting surfaces of alumina-titanium carbide composite material and diamond slicing blade. Conditions for testing are linear sliding speed between 0.2 and 0.4 m/s under applied load of 10 N and sliding distance up to 5000 m. The physical properties of both specimens which are mass loss, surface roughness and morphology of worn surface are investigated. The effect of linear sliding speed is analyzed in term of friction coefficient, surface roughness, and specific wear rate. It was found that, at initial state of wear, when sliding distant is less than 1000 m, the wear is severe, as seen by high values of specific wear rate and large fluctuation of friction coefficient. Worn surface of AlTiC is rougher than as-received condition. For a longer sliding distant, milder abrasion is found, as seen by the lower specific wear rate, and less fluctuation of friction coefficient, which produces worn AlTiC surface which is smoother than the as-received condition.

Wear Loss and Elution of C.P.Ti and Titanium Alloys in Simulated Body Fluids

2005 ◽  
Vol 475-479 ◽  
pp. 2333-2336 ◽  
Author(s):  
Kyosuke Ueda ◽  
Takayuki Narushima ◽  
Chiaki Ouchi ◽  
Yasutaka Iguchi
Keyword(s):  
Titanium Alloys ◽  
Wear Behavior ◽  
Wear Test ◽  
Body Fluids ◽  
Wear Testing ◽  
Wear Loss ◽  
Simulated Body Fluids ◽  
Average Size ◽  
Pin On Disk ◽  
Sliding Distance

Wear behavior of titanium materials such as C.P.Ti, Ti-6Al-4V and Ti-6Al-7Nb, was studied in simulated body fluids by means of the pin-on-disk type wear testing. The mass loss in wear testing increased with increasing the sliding distance. The a+b type titanium alloys, Ti-6Al-4V and Ti-6Al-7Nb, exhibited higher wear resistance than the C.P.Ti. Average size of the wear debris was 4.5 µm and 3.7 µm for C.P.Ti and the a+b type titanium alloys, respectively. The elution of metallic constituents into 1 mass% lactic acid solution was detected after the wear test.

Prediction of Wear Coefficient of Manganese Phosphate Coated AISI D2 Steel with Oil Lubricant

2013 ◽  
Vol 315 ◽  
pp. 117-120
Author(s):  
S. Ilaiyavel ◽  
S. Jegannathan ◽  
K. Ravichandran ◽  
A. Venkatesan
Keyword(s):  
Normal Load ◽  
Wear Test ◽  
Material Design ◽  
Wear Loss ◽  
Wear Coefficient ◽  
Manganese Phosphate ◽  
Average Wear ◽  
Pin On Disc ◽  
Aisi D2 ◽  
Pin On Disk

Today, in the area of material design conversion coatings play an important role in applications where temperature, corrosion, oxidation and wear come in to play. Manganese Phosphate is used to reduce friction and improve lubrication in sliding components. In this study, Prediction of wear coefficient of uncoated, Manganese Phosphate coated, Manganese Phosphate with oil lubricant AISI D2 steels was investigated using Archards equation. The Surface morphology of Manganese Phosphate coatings was examined by scanning electron microscope (SEM) and Energy dispersive X-ray Spectroscopy (EDX) .The wear tests were performed in a pin on disk apparatus as per ASTM G-99 Standard. The wear loss and wear coefficient were evaluated through pin on disc test using a sliding velocity of 0.35 m/s under normal load of 10 to60 N and controlled condition of temperature and humidity. Based on the results of the wear test, the Manganese Phosphate with lubricant exhibited the lowest average wear coefficient of1.24 X10-10 and the lowest wear loss 0.37 mm3 under 60 N load.

Sign in / Sign up

Export Citation Format

Share Document