Gross slip fretting wear performance of a layered thin W-DLC coating: Damage mechanisms and life modelling

Tobi, Abdul Latif Mohd; Shipway, P.H.; Leen, Seán B.

doi:10.1016/j.wear.2010.12.073

Cited by 27 publications

(20 citation statements)

References 38 publications

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“…4 for different number of cycles. General trends are similar as predicted in [9,10] where compressive stress region is at the leading edge of contact while tensile stress region at the trailing edge of contact. The stress is also predicted to reduce with increasing number of cycle while the location of maximum and minimum stress region is widening due to increasing of contact area due to wear.…”

Section: Resultssupporting

confidence: 85%

Investigation on the Fretting Wear of a Coated Substrate: Interlayer Stress Behaviour

Tobi

Harimon

Ismail

et al. 2014

AMM

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The effect of surface modification due to fretting wear behaviour of coated SCMV (High Strength Alloy Steel) with interlayer is investigated by simulation using ABAQUS Software on a cylinder on flat contact configuration under gross sliding conditions. The effect of interlayer stiffness and the surface modification are analysed with the focus on the interlayer stress failures and its associated stresses behaviour. Tangential stress and shear stress are predicted to reduce with the increase of numbers of wear cycles due to the effect of contact conforming. Stresses in the interlayer are predicted to increase with the interlayer stiffness due to the function of the interlayer as the load bearer.

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Section: Resultssupporting

confidence: 85%

Investigation on the Fretting Wear of a Coated Substrate: Interlayer Stress Behaviour

Tobi

Harimon

Ismail

et al. 2014

AMM

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“…The indentation depth did not exceed 1/10 of the coating thickness d. The evaluation of the measured results was based on the equations according to Oliver and Pharr . In accordance with the literature, a Poisson's ratio ν = 0.25 was assumed for the metal and hydrogen containing DLC coatings. Surface roughness of the coatings was measured in axial direction of the disc with the profile method (measurement length of L t = 4 mm, cut‐off wavelength of λ c = 0.08 mm).…”

Section: Methodsmentioning

confidence: 99%

A contribution to the thermal effects of DLC coatings on fluid friction in EHL contacts

Bobzin

Brögelmann

Kalscheuer

et al. 2018

Lubrication Science

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Diamond‐like carbon (DLC) coatings are commonly used to reduce boundary and mixed friction in tribological contacts. Recent works at the FZG efficiency gear test rig show that the application of the DLC coating ZrCg (a‐C:H:Zr) on gear flanks reduces the mean coefficient of friction in fluid film lubrication regime by up to 39% compared with uncoated gear flanks. A common explanation is the lower heat dissipation of DLC coatings resulting in higher EHL contact temperatures, hence in lower effective lubricant viscosity in the EHL contact. To gain a deeper understanding, discrete ZrxC1−x coatings were deposited on AISI 5115 using physical vapour deposition technology and thermophysical properties were directly measured. The tribological behavior of the coatings was investigated at the FZG twin‐disc test rig by using mineral gear oil. The results clearly prove the strong influence of the thermophysical properties of the DLC coatings on fluid friction in highly loaded EHL contacts.

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“…The standard test‐gear sets of type A were cleaned and coated at Oerlikon Balzers . The tungsten‐containing amorphous hydrogenated carbon (CrN + a–C : H : W), routinely used for the industrial physical vapor deposition coating of gears, was deposited using low‐temperature magnetron sputter technology.…”

Section: Test Gearsmentioning

confidence: 99%

“…Thin solid films have been extensively studied in recent years as a result of their promising tribological performance . In particular, the promising properties of diamond‐like carbon (DLC) coatings have led to a continuously increasing number of industrial applications in recent years.…”

Section: Introductionmentioning

confidence: 99%

Load-carrying capacity of WC/C-coated gears lubricated with a low-viscosity oil

Kržan

2015

Lubr. Sci.

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The application of low-friction coatings on the surfaces of gear teeth is primarily motivated by the increasing demands for load-carrying capacity or the rolling-contact fatigue life. Despite the costs of manufacturing being higher, better performance is an important consideration for many demanding applications. In the present study, we have investigated the load-carrying capacity of WC/C-coated gears that were lubricated with an oil blend that was formulated in-house. A significantly higher load-carrying capacity was found for the WC/C-coated gears lubricated with a tailored, low-viscosity oil in comparison with the case-carburised gears lubricated with a conventional gear oil of a similar viscosity. The carburised gears failed due to scuffing on the pinion tip, while coating thinning on the pinion face and coating fracture in the wheel-root area are the dominant failure mechanisms for WC/C-coated gears. An approximately 40% lower roughness was found on the coated gear flanks.

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Gross slip fretting wear performance of a layered thin W-DLC coating: Damage mechanisms and life modelling

Cited by 27 publications

References 38 publications

Investigation on the Fretting Wear of a Coated Substrate: Interlayer Stress Behaviour

Investigation on the Fretting Wear of a Coated Substrate: Interlayer Stress Behaviour

A contribution to the thermal effects of DLC coatings on fluid friction in EHL contacts

Load-carrying capacity of WC/C-coated gears lubricated with a low-viscosity oil

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