Effect of shot peening on rolling contact fatigue and lubricant film thickness within mixed lubricated non-conformal rolling/sliding contacts

Vrbka, Martin; Křupka, Ivan; Svoboda, Petr; Šperka, Petr; Návrat, Tomáš; Hartl, Martin; Nohava, Jiří

doi:10.1016/j.triboint.2011.06.019

Cited by 44 publications

(25 citation statements)

References 17 publications

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“…Conversely, other experimental works have reported an improvement in the durability of shot peened specimens tested at low pressure values, and a reduction in life when high pressures were applied . Finally, in some cases, shot peening has shown no substantial positive or detrimental effect on the contact fatigue life of discs. Possible negative effects are generally attributed to an increase of roughness caused by the treatment .…”

Section: Test Resultsmentioning

confidence: 98%

“…Finally, in some cases, shot peening has shown no substantial positive or detrimental effect on the contact fatigue life of discs. Possible negative effects are generally attributed to an increase of roughness caused by the treatment . Indeed, a roughness measurement performed on 3 shot‐peened and 3 un‐peened discs in the present work showed average Ra values of 0.70 and 0.57 μm, respectively.…”

Section: Test Resultsmentioning

confidence: 98%

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A comparison of rolling contact fatigue behaviour of 17NiCrMo6‐4 case‐hardened disc specimens and gears

Terrin

Meneghetti

2018

Fatigue Fract Eng Mat Struct

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A two‐disc test rig employed to assess the contact fatigue performance of gear materials is presented. Tests were performed on both shot‐peened and un‐peened 17NiCrMo6‐4 discs, designed to recreate the meshing conditions between the sun and planet gears of planetary gear sets in the wheel hubs of off‐highway vehicles. The mechanisms leading to pitting damage in disc specimens are discussed. Disc specimens with the same slide‐to‐roll ratio as that of the sun gears exhibited similar crater morphology but had 44% higher capacity in terms of contact pressure. This difference was attributed to changes in the disc geometry due to wear and micropitting during the tests, which enhanced the conformity between the contact surfaces and thus reduced the contact pressure for a given applied load.

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Section: Test Resultsmentioning

confidence: 98%

Section: Test Resultsmentioning

confidence: 98%

A comparison of rolling contact fatigue behaviour of 17NiCrMo6‐4 case‐hardened disc specimens and gears

Terrin

Meneghetti

2018

Fatigue Fract Eng Mat Struct

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“…Similarly, Sharma et al [31] reported that SP lowered the contact fatigue life of ADI by 60%. Also, Vrbka et al [46] report an 82% decrease in life of steel specimens following rolling contact fatigue tests. In the current study, austempering at 360°C resulted in a hardness of 370 HV, while SP increased the surface hardness to approximately 530 HV.…”

Section: Rolling Contact Fatigue Resistance Of Shot-peened Cu-ni Adimentioning

confidence: 97%

Shot Peening of Austempered Ductile Iron

Zammit¹

2018

Advanced Surface Engineering Research

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Austempered ductile iron (ADI) is a type of heat-treated cast iron, which offers numerous positive advantages including: good combination of mechanical properties and damping characteristics, lower density than steel and the possibility of casting components into near-net shape. However, surface engineering techniques are necessary to extend the use and prolong the lifetime of ADI engineering components. One such treatment for improving the bending fatigue strength of ADI is shot peening. This treatment creates compressive residual stresses and high dislocation densities at the surface of the treated components. However, the shot peening process is not always beneficial in improving the tribological characteristics of ADI. Its behaviour depends on the type of wear mechanism, applied loads, lubrication, heat treatment process parameters and the resulting surface finish of the components. This chapter will look into the effect of shot peening on ADI in more detail and will delve into a case study, which was carried out to analyse the bending fatigue resistance and tribological characteristics of Cu-Ni-alloyed ADI.

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“…Other authors studied aspects of friction [13,14], effects on pressure [15,16] and contact fatigue [17][18][19][20][21][22][23][24][25][26][27]. During recent years several review papers dealing with surface texturing have been published.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Shallow Indentation Effects in a Rolling-Sliding EHL Contact Based on Amplitude Attenuation Theory

et al. 2017

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In this paper amplitude attenuation theory is used to predict film thickness variations caused by shallow indentation inside a rolling-sliding elastohydrodynamic (EHL) contact. The model providing a complete analytical description of roughness passage through the contact is considered. The estimation model is compared with film thickness measurement obtained by optical interferometry. The in-contact effects for several shapes of indentation were simulated. It is clearly shown that optimal indentation profile should have smooth shape with large diameter and small depth. The results were generally explained on theoretical curves which bring a clear insight into the transient phenomenon and can be used as a rapid engineering tool.

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Effect of shot peening on rolling contact fatigue and lubricant film thickness within mixed lubricated non-conformal rolling/sliding contacts

Cited by 44 publications

References 17 publications

A comparison of rolling contact fatigue behaviour of 17NiCrMo6‐4 case‐hardened disc specimens and gears

A comparison of rolling contact fatigue behaviour of 17NiCrMo6‐4 case‐hardened disc specimens and gears

Shot Peening of Austempered Ductile Iron

Prediction of Shallow Indentation Effects in a Rolling-Sliding EHL Contact Based on Amplitude Attenuation Theory

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