Experimental Study on Mechanical Characteristics of PTFE Material

2019 ◽  
Vol 895 ◽  
pp. 224-229
Author(s):  
T. Nagaraju ◽  
K.S. Abhinanadhan ◽  
C. Anilkumar ◽  
S. Sathyanarayan
Keyword(s):  
Shape Parameter ◽  
Wear Test ◽  
Hardness Test ◽  
Wear Volume ◽  
Wear And Friction ◽  
Pin On Disc ◽  
Friction Performance ◽  
Two Parameters ◽  
Sliding Distance ◽  
Test Result

The present work is aimed to experimentally determine the mechanical properties such as Rockwell Hardness Number (RHN), tensile strength and two parameters of Weibull distribution curve (i.e. Weibull shape and characteristic life parameters) of fatigue life for the Poly Tetra Fluoro Ethylene (PTFE) material. The ultimate stress of PTFE specimen is determined using tensometer and its shape parameter and characteristic life are determined from rotary test bending machine. The PTFE specimen is also tested for wear and friction performance on pin-on-disc test rig. Based on the hardness test, RHN of PTFE was found to be 57 and its ultimate engineering stress was observed to be 20.5N/mm2. The Weibull shape parameter and characteristic life of PTFE specimen were observed to be 13.33 and 6734.5 cycles respectively. From the wear test result the sliding speed was found to have maximum influence on wear volume followed by sliding distance where as the load has least influence. .

scholarly journals Effect of Nano B4C on the Tribological Behaviour of Magnesium Alloy Prepared Through Powder Metallurgy

2020 ◽  
Vol 26 (4) ◽  
pp. 392-400
Author(s):  
Sankar CHINTHAMANI ◽  
Gangatharan KANNAN ◽  
Glan Devadhas GEORGE ◽  
Christopher Ezhil Singh SREEDHARAN ◽  
Krishna Sharma RAJAGOPAL
Keyword(s):  
Powder Metallurgy ◽  
Magnesium Alloy ◽  
Wear Test ◽  
Hardness Test ◽  
High Energy ◽  
Dry Sliding Wear ◽  
Tribological Behaviour ◽  
Ball Mills ◽  
Pin On Disc ◽  
B4c Particles

In this present study, the particle size of as received magnesium alloy (AZ91) and B4C powders was reduced through high energy ball mills. The combination of AZ91 (both 10 µm and 60 µm) reinforced with nano B4C particles were fabricated by powder metallurgy technique. The incorporation of nano B4C particles to the Mg matrix was done at various weight % such as 5, 10, 15 and 20. The AZ91 composites were fabricated in a suitable die set assembly and the green compacts were sintered in an electric muffle furnace at 500 °C with argon atmosphere for a dwell time of 1 h. The density of the composites was estimated using Archimedes principle. Micro hardness test was carried out for the prepared specimens and dry sliding wear test was conducted by using pin-on-disc apparatus at room temperature with varying loads and sliding velocities by keeping a constant Sliding Distance (SD). Among the various specimens, the composite with 10 µm size attained a higher Vickers hardness value as well as better wear resistant property. Worn surface analysis of the prepared composites was studied using Scanning Electron Microscope (SEM).

Plasma Sprayed Self-Lubricating Cr2O3-CaF2 Coatings: Friction and Wear Properties

1998 ◽  
Author(s):  
F. Vos ◽  
L. Delaey ◽  
M. De Bonte ◽  
L. Froyen
Keyword(s):  
Friction And Wear ◽  
Solid Lubricant ◽  
Composite Coatings ◽  
Substrate Surface ◽  
Wear Test ◽  
Ceramic Coatings ◽  
Wear Volume ◽  
Wear Properties ◽  
Wear And Friction ◽  
Friction And Wear Properties

Abstract An alternative production route to obtain thermally sprayed self-lubricating ceramic coatings is proposed and microstructural, friction and wear properties of these coatings are discussed. A preliminary powder treatment shows to induce a higher degree of homogeneity compared to conventionally deposited composite coatings, offering some perspectives for a further improvement of the lubricating and wear properties. This approach is illustrated using CaF2 as a solid lubricant dispersed in a Cr2O3 matrix, where the high melting point of the latter (Tm{Cr2O3} =2460°C) necessitates plasma spraying as deposition technique. The microstructure of the coatings is evaluated by a metallographic study of sections perpendicular and parallel to the substrate surface. Wear and friction behaviour is evaluated using reciprocating wear test Wear tracks are analysed by means of laser profilometry. The results are discussed in relation to test and production parameters. Test temperature as well as solid lubricant concentration predominantly affects the wear and friction properties. Using a surface temperature of 400°C a friction coefficient of 0.25 and a wear volume of 37*103 µm3 after 10.000 cycles are obtained for a coating containing 16 vol.% of CaF2.

scholarly journals In-Situ Formed Al3Zr Compounds Reinforced Al Composites and Tribological Application

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 227
Author(s):  
Junko Umeda ◽  
Nodoka Nishimura ◽  
Hiroko Fujii ◽  
Lei Jia ◽  
Katsuyoshi Kondoh
Keyword(s):  
Wear Test ◽  
Wear Volume ◽  
Metal Powders ◽  
Tribological Application ◽  
Uniform Dispersion ◽  
Pin On Disc ◽  
Metallurgical Bond ◽  
Al Matrix Composite ◽  
Al Matrix

An Al3Zr-reinforced Al matrix composite using metal powders was fabricated via in-situ synthesis in vacuum; these were subjected to a pin-on-disc wear test with a SUS304 disc specimen under oil lubrication. The elemental mixture of Al and ZrH2 particles was sintered in vacuum for the in-situ-formed Al3Zr. ZrH2 particles were thermally decomposed in the reaction with the Al matrix to form hard Al3Zr intermetallic compounds. The friction coefficient and wear volume values of the Al–Al3Zr composites were significantly lower than those of the pure Al specimen. This is attributed to the uniform dispersion of Al3Zr particles in the Al matrix, which prevented the metallurgical bond from falling and blocked the direct contact between the Al matrix and SUS304 disc.

Research on Friction Property of Pin on Disc and Analysis of Wear Mechanism Based on MMW-1A Friction and Wear Testing Machine

2018 ◽  
Vol 764 ◽  
pp. 86-92
Author(s):  
Zhi Peng Chen ◽  
Xiao Yi Jin ◽  
Chun Yun Ji ◽  
Chuan Wang ◽  
Jian Liu Zhu
Keyword(s):  
Friction Factor ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Mechanical Design ◽  
Testing Machine ◽  
Wear Test ◽  
Wear Testing ◽  
Wear Volume ◽  
Test Machine ◽  
Pin On Disc

Friction and wear are very important in mechanical design. This paper studies the friction and wear characteristics of 45 steel under oil lubrication. The sliding friction and wear experiment was carried out with the pin plate friction pairs on the MMW-1A friction and wear test machine. Researching the influence of velocity on friction factor under the same load, the relation between wear and load and wear analysis under the same speed different loads. The results showed that under the same load and with the increase of velocity, the friction factor had a gradually decreasing trend. When some of the parameters were certain, the wear volume and the loading force was roughly linear relation. Pitting occurred when the load increased.

ABRASIVE WEAR BEHAVIOUR OF COPPER-SiC AND COPPER-SiO2 COMPOSITES

2013 ◽  
Vol 22 ◽  
pp. 416-423 ◽  
Author(s):  
TEJAS UMALE ◽  
AMARJIT SINGH ◽  
Y. REDDY ◽  
R. K. KHATITRKAR ◽  
S. G. SAPATE
Keyword(s):  
Abrasive Wear ◽  
Wear Debris ◽  
Copper Matrix ◽  
Wear Behaviour ◽  
Wear Volume ◽  
Matrix Composites ◽  
Debris Particles ◽  
Pin On Disc ◽  
Abrasive Wear Behaviour ◽  
Sliding Distance

The present paper reports abrasive wear behaviour of copper matrix composites reinforced with silicon carbide and silica particles. Copper – SiC (12%) and Copper-SiO2 (9%) composites were prepared by powder metallurgical technique. Metallography, image analysis and hardness studies were carried out on copper composites. The abrasive wear experiments were carried out using pin on disc apparatus. The effect of sliding distance and load was studied on Copper – SiC (12%) and Copper-SiO2 (9%) composites. The abrasive wear volume loss increased with sliding distance in both the composites although the magnitude of increase was different in each case. Copper – SiC (12%) composites exhibited relatively better abrasion resistance as compared to and Copper-SiO2 (9%) composites. The abraded surfaces were observed under scanning electron microscope to study the morphology of abraded surfaces and operating wear mechanism. The analysis of wear debris particles was also carried out to substantiate the findings of the investigation.

scholarly journals SLIDING WEAR AND FRICTION BEHAVIOR OF FUEL ROD MATERIAL IN WATER AND DRY STATE

2012 ◽  
Vol 06 ◽  
pp. 479-484
Author(s):  
JIN MOO PARK ◽  
JAE HOON KIM ◽  
KYEONG LAK JEON ◽  
JUN KYU PARK
Keyword(s):  
Zirconium Alloy ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Wear Volume ◽  
Surface Zone ◽  
Friction Behavior ◽  
Fuel Rod ◽  
Heat Treated ◽  
Pin On Disc ◽  
Sliding Distance

In water cooled reactors, the friction between spacer grid and fuel rod can lead to severe wear and it is an important topic to study. In the present study, sliding wear behavior of zirconium alloy was investigated in water and dry state using the pin-on-disc sliding wear tester. Sliding wear resistance of zirconium alloy against heat treated inconel alloy was examined at room temperature. The parameters in this study were sliding velocity, axial load and sliding distance. The wear characteristics of zirconium alloy was evaluated by friction coefficient, specific wear rate and wear volume. The micro-mechanisms responsible for wear in zirconium alloy were identified to be micro-cutting, micro-pitting, delamination and micro-cracking of deformed surface zone.

EFFECT OF WATER AS LUBRICANT ON FRICTION AND WEAR PROPERTIES OF CGRP COMPOSITE EVALUATED BY POD AND BOR TECHNIQUES

2007 ◽  
Vol 14 (02) ◽  
pp. 185-191 ◽  
Author(s):  
B. F. YOUSIF ◽  
N. S. M. EL-TAYEB
Keyword(s):  
Experimental Tests ◽  
Test Duration ◽  
Wear Properties ◽  
Test Technique ◽  
Friction Characteristics ◽  
Wear Rates ◽  
Wear And Friction ◽  
Pin On Disc ◽  
Dry Conditions ◽  
Friction Performance

In the current decade, introducing water as a lubricant for tribo-engineering materials has become a concern for many researchers. In the present study, the wear and friction characteristics of a polyester (CGRP) composite reinforced with a chopped glass mat (CSM) 450 g/m2 was investigated under dry and wet conditions against a polished, stainless steel counterface. Two techniques known as Pin on Disc (POD) and Block on Ring (BOR) were used to perform the experimental tests. The tests were conducted on a newly developed machine that could carry out both techniques. The effects of the applied load (30, 50, 70, 100 N ), sliding velocity (2.8 and 3.9 m/s), and test duration (5–30 min) on wear rates and the coefficients of friction were investigated. Under dry conditions, the temperature of the interface was measured with an infrared thermometer. Worn surface morphologies of the composite were observed with a scanning electron microscopy (SEM) and damage features were characterized. The results showed that the test technique and conditions had significant influences on the wear and friction performance of the CGRP composite. The presence of water as a lubricant enhanced the wear and friction characteristics of the composite as determined by both POD and BOR, and the SEM micrographs demonstrated several damage features under dry/wet conditions, e.g., deformation, as well as fiber peeling, cracking, and cutting.

Wear Characteristics of Ni-WC Powder Deposited by Using a Microwave Route on Mild Steel

2020 ◽  
Vol 8 (1) ◽  
pp. 44-54
Author(s):  
Hitesh Vasudev
Keyword(s):  
Mild Steel ◽  
Deposition Time ◽  
Research Work ◽  
Base Material ◽  
Wear Test ◽  
Hardness Test ◽  
Microscopy Technique ◽  
Pin On Disc ◽  
Testing Techniques ◽  
Microwave Applicator

In the present research work, Ni-WC powder was deposited on mild steel using a microwave applicator. Deposited clad has a thickness of 0.5 mm and deposition time taken for coating was 15 minutes for each sample size. The developed layer on the substrate was analysed through several testing techniques include mechanical characterization by the Vickers hardness test and a wear test on the Pin-on disc apparatus according to ASTM-G99 standard. Furthermore, micro structural characterization was done by using scanning electron microscopy technique and it has shown proper bonding between powder and substrate. Coating showed excellent results in terms of hardness and wear resistance as compared to base material mils steel. The pullout, scoring and abrasion were the responsible wear mechanisms in the substrate and clad.

scholarly journals Tribological Properties on P91 Alloy Steel Treated with Normalizing & Carburizing Process

2019 ◽  
Vol 9 (1) ◽  
pp. 2078-2082 ◽  
Keyword(s):  
Heat Treatment ◽  
Wear Test ◽  
High Hardness ◽  
Hardness Test ◽  
Variable Load ◽  
X Ray Diffraction ◽  
P91 Steel ◽  
Treatment Processes ◽  
Pin On Disc ◽  
Alloy Steels

An Experimental analysis was undertaken to analyze the changes in the Mechanical Properties and Microstructure of P91 steel, subjected to Normalizing and Carburizing heat treatment Processes keeping in mind the potential capabilities of P91 steel as the base metal due to its wide applications in Boilers manufacturing. P91 is a type of alloy steels having high hardness and wear resistance suface. The heat treatment processes were carried out in the present experimental procedure at constant temperature and for different timings like 60 minutes, 90 minutes and 120 minutes. Hardness of the specimen was tested by using Rockwell Hardness test. A pin on disc machine was used to conduct the wear test. Wear test was carried out on treated P91 steel on various parameters like variable load and constant speed. The Microstructural results are concluded with SEM (Scanning Electron Microscope) and XRD (X-Ray diffraction) techniques

scholarly journals Friction Performance of Aged T-BFRP Composite for Bearing Applications

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1066 ◽  
Author(s):  
Umar Nirmal
Keyword(s):  
Stainless Steel ◽  
Friction Coefficient ◽  
Wear Test ◽  
Test Rig ◽  
Microscopy Imaging ◽  
Friction Coefficients ◽  
Aisi 304 ◽  
Pin On Disc ◽  
Optical Microscopy Imaging ◽  
Friction Performance

The current work is an attempt to reduce friction coefficient of the treated betelnut fibre reinforced polyester (T-BFRP) composites by aging them in twelve different solutions with different kinematic viscosities. The test will be performed on a pin on disc (POD) wear test rig using different applied loads (5–30 N), different sliding distances (0–6.72 km) at sliding speed of 2.8 m/s subjected to a smooth stainless steel counterface (AISI-304). Different orientations of the fibre mats such as anti-parallel (AP) and parallel (P) orientations subjected to the rotating counterface will be considered. The worn surfaces were examined through optical microscopy imaging and it was found that the aged specimens had significantly lower damages as compared to neat polyester (NP) and the unaged samples. Besides, P-O samples revealed lower friction coefficients as compared to AP-O, i.e., reduction was about 24.71%. Interestingly, aging solutions with lower kinematic viscosities revealed lower friction coefficients of the aged T-BFRP composites when compared to the ones aged in higher kinematic viscosities.

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