The influence of atmospheric humidity on the friction and wear of carbon steels

Oh, Hung-Kuk; Yeon, Kyu-Hyun; Kim, Hak Yun

doi:10.1016/s0924-0136(99)00259-9

Cited by 32 publications

(15 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The friction and wear of mild and carbon steels were shown to decrease with increasing RH in pin-on-disk experiments when tested over the range of 60%80% RH, although lower RH values were not investigated and mechanism was not reported [23,24]. Pin-on-disk studies between carbon steels with varying carbon contents found a transition from severe wear to mild wear at intermediate RH (40%-50%), with mild wear being attributed to shear occurring on a surface oxide layer [25]. The same trend was observed in pin-on-disk tests using AISI 304 stainless steel [26,27].…”

Section: Environmental Effect On Friction and Wear Of Metalsmentioning

confidence: 99%

Vapors in the ambient—A complication in tribological studies or an engineering solution of tribological problems?

et al. 2015

View full text Add to dashboard Cite

Tribology involves not only two-body contacts of two solid materials-a substrate and a counter-surface; it often involves three-body contacts whether the third body is intentionally introduced or inevitably added during the sliding or rubbing. The intentionally added third body could be lubricant oil or engineered nanomaterial used to mitigate the friction and wear of the sliding contact. The inevitably added third body could be wear debris created from the substrate or the counter surface during sliding. Even in the absence of any solid third-body between the sliding surfaces, molecular adsorption of water or organic vapors from the surrounding environment can dramatically alter the friction and wear behavior of solid surfaces tested in the absence of lubricant oils. This review article covers the last case: the effects of molecular adsorption on sliding solid surfaces both inevitably occurring due to the ambient test and intentionally introduced as a solution for engineering problems. We will review how adsorbed molecules can change the course of wear and friction, as well as the mechanical and chemical behavior, of a wide range of materials under sliding conditions.

show abstract

Section: Environmental Effect On Friction and Wear Of Metalsmentioning

confidence: 99%

Vapors in the ambient—A complication in tribological studies or an engineering solution of tribological problems?

et al. 2015

View full text Add to dashboard Cite

show abstract

“…12 A transition occurring at low values of normal load or sliding velocity was called T 1 by Welsh 12 and has been observed by varying the surface roughness, 3 the atmospheric temperature, 14,15 the materials hardness 16 and the relative humidity. 17,18 In an earlier work, we found the T 1 transition from mild to severe wear when the hardness of the harder body was diminished. 5 This result showed that not only the hardness of the softer body influences the tribological behaviour but also the hardness of the harder body.…”

Section: Introductionmentioning

confidence: 73%

“…This transition has been observed with the change of normal load, the addition of oxide particles and the removal of wear debris . A transition occurring at low values of normal load or sliding velocity was called T 1 by Welsh and has been observed by varying the surface roughness, the atmospheric temperature, the materials hardness and the relative humidity …”

Section: Introductionmentioning

confidence: 99%

The effect of hardness of sliding bodies on the wear regime transition of steels

Viáfara

Sinatora

2012

Lubrication Science

View full text Add to dashboard Cite

This paper aims to investigate the effect of varying the hardness of both sliding bodies on the operating wear regime. Unlubricated sliding wear tests were performed using a pin‐on‐disc configuration. The friction coefficient was monitored during the wear tests, and the variation of mass loss of bodies as a function of sliding distance was obtained to estimate the steady‐state wear rate. The results showed that the operation of mild and severe wear regimes was influenced by the initial hardness of materials. Under the high pin hardness conditions, a decrease in the disc hardness promoted the severe wear regime operation prior to the action of a mild wear regime. Under the low pin hardness conditions, a severe wear regime was established. When the harder disc was tested, a mild wear regime was observed. Copyright © 2012 John Wiley & Sons, Ltd.

show abstract

“…One observes that the mean wear rate displays a maximum w max at a certain relative humidity denoted RH max . Occurrence of RH max can be explained through the processes related to amount of oxygen and water adsorbed into the surface, in correlation with the adhesive wear [9][10][11][12][13][14][15][16][17]. For RH below RH max during a dry oxidative process, repeatedly formation and breakdown of the surface oxide film leads to generation of very small wear particles, which are not hard enough to produce abrasive wear, but acts as a lubricating powder to reduce the adhesive fretting wear.…”

Section: Relationship Between the Mean Dynamic Frictionmentioning

confidence: 99%

“…Depending on the loading conditions, material properties and environment, fretting can cause fretting wear, which combines all four basic mechanisms (oxidative, adhesive, surface fatigue and abrasive), or fretting fatigue, which combines surface and bulk fatigue [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Fretting wear and fatigue severely decrease the life of machine elements (e.g., rolling element bearings, screw and rivet assemblies, etc.)…”

Section: Introductionmentioning

confidence: 99%

On the Necessary but Sufficient Amount of Grease to Obtain Fully Lubricated Fretting Regime in Moist Air for SUJ2 Bearing Steel against S15C Carbon Steel

2013

View full text Add to dashboard Cite

Influence of the moist air humidity (10-70%) on the fretting characteristics of steels under grease lubrication is experimentally investigated. Ball (bearing steel, JIS SUJ2) on disk (carbon steel, JIS S15C) type fretting tests for 0-20 mg of grease supplied before each test at the punctual contact between ball and disk were conducted at 50 µm slip amplitude and 6.7 Hz frequency. From the shape of the friction hysteresis one calculates the slip index, and based on it, determines the type of fretting regime against the number of fretting cycles. Influence of the grease amount and relative humidity on the friction coefficient, slip index and wear rate is interpreted based on the occurrence of the grease film breakdown. Fretting wear rate appears as unaffected by variation of the environmental humidity for an amount of grease exceeding 3 mg, this representing the minimum amount necessary to avoid the grease film breakdown. Results obtained are useful to find the amount of grease necessary but sufficient for proper lubrication, and hence to protect the environment by grease saving. In order to generalize the results obtained for ball-bearings, screws, joints, guide-ways, etc., a tribological analysis based on the Stribeck curve was performed and then, the amount of grease necessary but sufficient to obtain fully lubricated fretting regime in moist air for ball bearings was discussed in detail.

show abstract

The influence of atmospheric humidity on the friction and wear of carbon steels

Cited by 32 publications

References 8 publications

Vapors in the ambient—A complication in tribological studies or an engineering solution of tribological problems?

Vapors in the ambient—A complication in tribological studies or an engineering solution of tribological problems?

The effect of hardness of sliding bodies on the wear regime transition of steels

On the Necessary but Sufficient Amount of Grease to Obtain Fully Lubricated Fretting Regime in Moist Air for SUJ2 Bearing Steel against S15C Carbon Steel

Contact Info

Product

Resources

About