Fretting wear of a nitrided 316L/304L contact subject to in-phase normal force fluctuation in dry and lithium-boron solution: An R P -friction energy wear approach

In this work, to investigate the role of the third body in the fretting behavior of 690 alloy, the fretting capabilities of 690 alloy against 405 stainless steel have been performed under various experimental conditions. The testing normal force and temperature varied from 10 N to 40 N and from room-temperature (RT) to [Formula: see text]C, respectively, at 5 Hz and 200 [Formula: see text]m. The results demonstrated that the profile shape of wear scar was dependent on the action of the wear particles. Three typical profile shapes were examined in this work: “U” shape, “W” shape and “M” shape. The balance of the formation and ejection of wear particles led to a steady value of the coefficient of friction (COF) and friction energy.

Download Full-text

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

Materials ◽

10.3390/ma14092153 ◽

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.

Download Full-text

Composite Fretting Wear of Aluminum Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.353-358.868 ◽

2007 ◽

Vol 353-358 ◽

pp. 868-873 ◽

Cited By ~ 4

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.

Download Full-text

Evaluation of Fretting Wear Under Oscillating Normal Force

Bench Testing of Industrial Fluid Lubrication and Wear Properties Used in Machinery Applications ◽

10.1520/stp10514s ◽

2008 ◽

pp. 267-267-16

Author(s):

MZ Huq ◽

J-P Celis

Keyword(s):

Normal Force ◽

Fretting Wear

Download Full-text

Fretting wear analysis through a mechanical friction energy approach: Impact of contact loadings and ambient conditions

10.1016/b978-0-12-823765-6.00007-9 ◽

2021 ◽

pp. 131-167

Author(s):

Siegfried Fouvry

Keyword(s):

Energy Approach ◽

Fretting Wear ◽

Ambient Conditions ◽

Wear Analysis ◽

Friction Energy

Download Full-text

An Innovative System for Fretting Wear Testing Under Oscillating Normal Force

Journal of Materials Research ◽

10.1557/jmr.2000.0228 ◽

2000 ◽

Vol 15 (7) ◽

pp. 1591-1599 ◽

Cited By ~ 11

Author(s):

M. Z. Huq ◽

C. Butaye ◽

J-P. Celis

Keyword(s):

Contact Resistance ◽

Normal Force ◽

Electrical Contact ◽

Wear Test ◽

Fretting Wear ◽

Wear Testing ◽

Mode Ii ◽

Test Machine ◽

Electrical Contact Resistance ◽

Wide Range

Material damage caused by fretting wear is of significant concern in many engineering applications. This paper describes the design and performance of a new machine for the laboratory investigation of fretting wear under oscillating normal force (fretting mode II). The test machine uses an electromagnetic actuator to impose an oscillating normal force between the contacting bodies at a constant force amplitude over a wide range of frequencies. The principle of the actuation mechanism and the fretting wear induced with this particular wear test configuration are outlined in detail. Normal force and electrical contact resistance were measured on-line during fretting mode II wear tests. The performance of the wear test machine is illustrated by data obtained for different materials combinations, namely, hard materials, such as high-speed steel and (Ti,Al)N coatings oscillating against alumina ball counterbodies, and soft materials, such as a tin coating oscillating against the same. In general, wearing of the counterbodies was observed in the slip region. It has been observed that hard coatings and bulk ceramics are prone to fretting fatigue cracking. The evolution of electrical contact resistance in the case of the self-mated soft tin coatings tested under fretting mode II conditions is also reported.

Download Full-text