scholarly journals Fretting Wear Behavior of Three Kinds of Rubbers under Sphere-On-Flat Contact

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2153
Author(s):  
Tengfei Zhang ◽  
Jie Su ◽  
Yuanjie Shu ◽  
Fei Shen ◽  
Liaoliang Ke
Keyword(s):  
Normal Force ◽  
Wear Behavior ◽  
Displacement Amplitude ◽  
Fretting Wear ◽  
Butadiene Rubber ◽  
Force Frequency ◽  
Sealing Performance ◽  
Rubber Surface ◽  
Sealing Materials ◽  
Flat Contact

Rubbers are widely used in various fields as the important sealing materials, such as window seal, door seal, valve, pump seal, etc. The fretting wear behavior of rubbers has an important effect on their sealing performance. This paper presents an experimental study on the fretting wear behavior of rubbers against the steel ball under air conditions (room temperature at 20 ± 2 °C and humidity at 40%). Three kinds of rubbers, including EPDM (ethylene propylene diene monomer), FPM (fluororubber), and NBR (nitrile–butadiene rubber), are considered in experiments. The sphere-on-flat contact pattern is used as the contact model. The influences of the displacement amplitude, normal force, frequency, and rubber hardness on the fretting wear behavior are discussed in detail. White light profiler and scanning electron microscope (SEM) are used to analyze the wear mechanism of the rubber surface. The fretting wear performances of three rubbers are compared by considering the effect of the displacement amplitude, normal force, frequency, and rubber hardness. The results show that NBR has the most stable friction coefficient and the best wear resistance among the three rubbers.

scholarly journals Experimental Studies on Fretting Wear Behavior of PVDF Piezoelectric Thin Films

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 734
Author(s):  
Yuanjie Shu ◽  
Liaoliang Ke ◽  
Jie Su ◽  
Fei Shen
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Applied Voltage ◽  
Polyvinylidene Fluoride ◽  
Normal Force ◽  
Wear Behavior ◽  
Experimental Studies ◽  
Displacement Amplitude ◽  
Fretting Wear ◽  
Wear Volume

This paper discusses an in-depth experimental study on the fretting wear behavior of PVDF (polyvinylidene fluoride) piezoelectric thin film against a Si3N4 ceramic sphere under air conditions. A fretting wear device with a ball-on-plate contact configuration was applied. The changes of displacement amplitude, normal force, and applied voltage were taken into account. The friction logs were used to determine the contact state of the PVDF thin film during the fretting test. The 3D topography instrument and scanning electron microscope (SEM) were used to measure the details of the surface morphology and wear volume. The test results of PVDF thin films under different normal force, displacement amplitude, and applied voltage are summarized through the collection and analysis of experimental data. It is shown that the creep and plastic deformation lead to obvious winkles at the contact surface, which may decrease the specific wear rate of PVDF thin films.

Composite Fretting Wear of Aluminum Alloy

2007 ◽  
Vol 353-358 ◽  
pp. 868-873 ◽  
Author(s):  
Min Hao Zhu ◽  
Zhong Rong Zhou
Keyword(s):  
Plastic Deformation ◽  
Aluminum Alloy ◽  
Relative Motion ◽  
Wear Mechanism ◽  
Normal Force ◽  
Fretting Wear ◽  
Test Results ◽  
Contact Configuration ◽  
Inclined Angle ◽  
Flat Contact

A complex relative motion of fretting combined by dual motions of radial and tangential fretting was achieved on a modified fretting tester. The composite fretting motion was induced by the action of an oscillating normal force in a sphere-on-inclined flat contact (52100 steel ball against 2091 aluminum alloy). Two types of inclined angles (45° and 60°) were used in the tests. Variations of veridical force vs displacement have been recorded and analyzed as a function of cycles. Effects of the cyclic normal force and the inclined angle were discussed. The test results showed that wear, cracking and plastic deformation accumulation with a strong dissymmetry in damage morphology was observed. A transformation of fretting mode from composite to radial fretting mode occurred due to a strong modification at local contact configuration. As a conclusion, a physical model for wear mechanism of composite fretting was presented.

Fretting Wear Behavior and Mechanism of Inconel 690 Alloy Related to the Displacement Amplitude

2016 ◽  
Vol 60 (5) ◽  
pp. 913-922 ◽  
Author(s):  
L. Xin ◽  
Z. H. Wang ◽  
J. Li ◽  
Y. H. Lu ◽  
T. Shoji
Keyword(s):  
Wear Behavior ◽  
Displacement Amplitude ◽  
Fretting Wear ◽  
Inconel 690

scholarly journals The roles of contact conformity, temperature and displacement amplitude on the lubricated fretting wear of a steel-on-steel contact

2016 ◽  
Vol 3 (10) ◽  
pp. 150637 ◽  
Author(s):  
A. R. Warmuth ◽  
W. Sun ◽  
P. H. Shipway
Keyword(s):  
Contact Pressure ◽  
Displacement Amplitude ◽  
Fretting Wear ◽  
Wear Behaviour ◽  
Physical Parameters ◽  
Chemical Effects ◽  
Experimental Parameters ◽  
The Relationship ◽  
Lubricant Viscosity ◽  
Flat Contact

This paper investigates the effect of contact geometry, temperature and displacement amplitude on the fretting behaviour of an aero-turbo oil lubricated cylinder-on-flat contact. To be effective, the lubricant needed both to penetrate the contact and then offer protection. Lubricant penetration into the fretting contact is found to be controlled by two physical parameters, namely (i) the width of the contact that remains covered throughout the fretting test and (ii) the lubricant viscosity. The protection offered by the lubricant (assuming that it has successfully penetrated the contact) is influenced by four physical parameters, namely (i) lubricant viscosity, (ii) traverse velocity, (iii) nominal contact pressure, and (iv) chemical effects. The relationship between the three experimental parameters which were varied in the programme of work (temperature, fretting displacement and cylinder radius) and physical parameters which influence the protection offered by the lubricant film can be competing, and therefore complex wear behaviour is observed. The roles of the various parameters in controlling the wear behaviour are presented in a coherent physical framework.

Wear Behavior and Mechanical Properties of TiO2 Coating Deposited Electrophoretically on 316 L Stainless Steel

2017 ◽  
Vol 140 (3) ◽  
Author(s):  
Hafedh Dhiflaoui ◽  
Khlifi Kaouther ◽  
Ahmed Ben Cheikh Larbi
Keyword(s):  
Mechanical Properties ◽  
Normal Force ◽  
Wear Behavior ◽  
Close Relation ◽  
Fretting Wear ◽  
Sliding Velocity ◽  
Wear Coefficient ◽  
Wear Performance ◽  
Characterization Methods ◽  
316 L Stainless Steel

In this work, the TiO2 coatings were synthesized by electrophoretic deposition (EPD) of nanosized powder in order to improve the tribological properties. Several characterization methods were applied to the coated substrates. The surface topography of the EPD layers, their morphology, composition, and mechanical properties were investigated. The influence of heat treatment, which results in calcination, on the wear performance of coated films was also examined. It was noticed that the effect of the normal force and sliding velocity on the coefficients of instantaneous and stabilized friction was not the same in treated coatings and untreated ones. Moreover, the treated and uncoated films showed a close relation between the dissipated accumulated energy and the worn volume. The energetic wear coefficients of fretting wear were also studied. As expected, the treated coating reduced the energetic wear coefficient, which enhanced the resistance to fretting wear.

scholarly journals The Effect of Displacement Amplitude on Fretting Wear Behavior and Damage Mechanism of Alloy 690 in Different Gaseous Atmospheres

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5778
Author(s):  
Long Xin ◽  
Lanzheng Kang ◽  
Weiwei Bian ◽  
Mengyang Zhang ◽  
Qinglei Jiang ◽  
...  
Keyword(s):  
Wear Behavior ◽  
Displacement Amplitude ◽  
Fretting Wear ◽  
Partial Slip ◽  
Wear Volume ◽  
Stick Slip ◽  
Slip Regime ◽  
Mixed Regime ◽  
Alloy 690 ◽  
Strong Adhesion

The effect of displacement amplitude on fretting wear behavior and damage mechanisms of alloy 690 in air and nitrogen atmospheres was investigated in detail. The results showed that in air, the friction coefficient gradually increased with the increase in displacement amplitude which conformed to the universal law. In nitrogen, however, it had the highest point at the displacement amplitude of 60 μm due to very strong adhesion. Whether in air or nitrogen, the wear volume gradually increased with the increase in displacement amplitude. The wear volume in air was larger than that in nitrogen except at 30 μm. At 30 μm, the wear volume in air was slightly smaller. With an increase in displacement amplitude, a transformation of fretting running status between partial slip, mixed stick-slip, and final gross slip occurred along with the change of Ft-D curves from linear, to elliptic, to, finally, parallelogrammical. Correspondingly, the fretting regime changed from a partial slip regime to a mixed regime to a gross slip regime. With the increase in displacement amplitude, the transition from partial slip to gross slip in nitrogen was delayed as compared with in air due to the strong adhesion actuated by low oxygen content in a reducing environment. Whether in air or nitrogen, the competitive relation between fretting-induced fatigue and fretting-induced wear was prominent. The cracking velocity was more rapid than the wear. Fretting-induced fatigue dominated at 30 μm in air but at 30–60 μm in nitrogen. Fretting-induced wear won the competition at 45–90 μm in air but at 75–90 μm in nitrogen.

scholarly journals Abrasive Slurry Erosion Behavior of Nitrile-Butadiene Rubber with Different Acrylonitrile Contents

2019 ◽  
Vol 26 (1) ◽  
pp. 71-76
Author(s):  
Rui NIE ◽  
Shijie WANG ◽  
Shuyuan SONG
Keyword(s):  
Erosion Rate ◽  
Wear Behavior ◽  
Butadiene Rubber ◽  
Slurry Erosion ◽  
Erosion Testing ◽  
Nitrile Butadiene Rubber ◽  
Dynamic Swelling ◽  
Rubber Surface ◽  
Swelling Mechanism ◽  
Erosion Test

Nitrile-butadiene rubber (NBR) with different acrylonitrile contents were eroded by quartz slurry using a self-made erosion testing apparatus to study the erosion wear behavior. Quartz slurry with a concentration of 33 wt.% was used to impact the specimen surface at 45° sample angle. The experimental data, such as erosion rate, hardness and swelling increment were compared and analyzed. The morphologies of worn surfaces were characterized using the field emission scanning electron microscopy to reveal the wear mechanism. The results showed that the acrylonitrile content in the molecular chains had a significant effect on the erosion performance of NBR. Furthermore, a static swelling test was conducted as a contrast experiment to investigate the effect of erosion on the swelling behavior of rubber surface. By comparing the results it could be found that the dynamic swelling increment during the erosion test was almost four or five times larger than that of static swelling. Mechanism of the interaction between swelling and erosion was also discussed.

Fretting wear behavior of acrylonitrile–butadiene rubber (NBR) for mechanical seal applications

2016 ◽  
Vol 93 ◽  
pp. 419-428 ◽  
Author(s):  
Ming-xue Shen ◽  
Xu-dong Peng ◽  
Xiang-kai Meng ◽  
Jin-peng Zheng ◽  
Min-hao Zhu
Keyword(s):  
Wear Behavior ◽  
Fretting Wear ◽  
Butadiene Rubber ◽  
Mechanical Seal ◽  
Acrylonitrile Butadiene Rubber
Sign in / Sign up

Export Citation Format

Share Document