Study on Rolling Contact Fatigue in Hydrogen Atmosphere - Improvement of Rolling Contact Fatigue Life by Formation of Surface Film -

Endo, Toshiaki; Dong, Daming; Imai, Yutaka; Yamamoto, Yasuhiko

doi:10.1016/s0167-8922(05)80036-7

Cited by 21 publications

(26 citation statements)

References 7 publications

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“…Life of rolling element bearings is significantly reduced by the hydrogen induced degradation of steel. Endo et al [1] and Imai et al [2] reported that hydrogen permeated into steel in ambient pressure hydrogen, resulting in reduction of life to one tenth of calculated life. They also suggested that the hydrogen embrittlement occurring in the subsurface of rolling elements promoted the crack propagation and reduced flaking life.…”

Section: Introductionmentioning

confidence: 99%

Effect of Environmental Gas on Surface Initiated Rolling Contact Fatigue

et al. 2013

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This paper describes an exploratory study on the effects of temperature on the formation of oxide film and rolling contact fatigue life in hydrogen, argon and air. Rolling contact fatigue tests were conducted at 333 K and 363 K by using a three-ball-on-disk type apparatus. The rolling contact fatigue life in hydrogen was shorter than that in argon, and life in air was the longest. Relationship was found between fatigue life and hydrogen concentration in steel. Cross sections of the specimens show that iron oxide grew to larger grain size in the subsurface in hydrogen environment, which may have resulted in shorter fatigue life. It was also found that fatigue failure occurs on ball surface in hydrogen at 363 K.

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Section: Introductionmentioning

confidence: 99%

Effect of Environmental Gas on Surface Initiated Rolling Contact Fatigue

et al. 2013

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“…On the effects of hydrogen gas atmosphere, some studies showed that the rolling contact fatigue life decreases with the formation of the white structure 19,20) . It is clear that bearing life becomes shorter and white structure is formed due to hydrogen as mentioned above.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Hydrogen on Microstructural Change and Surface Originated Flaking in Rolling Contact Fatigue

et al. 2011

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The effects of hydrogen on microstructural change and surface originated flaking in rolling contact fatigue were investigated using JIS-SUJ2 bearing steel specimens charged with hydrogen. Under clean lubrication conditions, subsurface originated flaking occurred and the rolling contact fatigue life was reduced and the amounts of the microstructural change called white structure that formed in the specimens increased as the hydrogen content increased. The localized microstructural changes were found in the hydrogen-charged specimens by electron microscope observations. It is supposed that the localization of plasticity was enhanced by hydrogen during the process of rolling contact fatigue. Under contaminated lubrication conditions, which included debris in the lubricating oil, surface originated flaking occurred and the rolling contact fatigue life of the hydrogen-charged specimens became shorter than the uncharged specimens, although white structure was not observed around the flaking. Enhancement of fatigue crack formations due to hydrogen was observed in specimens with artificial dents. It is presumed that hydrogen facilitated the formation of fatigue cracks on the raceway surface.

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“…Previous research has shown that the use of additives which lead to the formation of a tribofilm on the wear track can reduce hydrogen damage. The most studied additives have been the conventional antiwear zinc dialkyldithiophosphate (ZDDP) and extreme pressure trioctyl phosphate (TCP) because of their ability to dynamically generate thick and uniform chemical tribofilms which impede hydrogen generation and permeation while simultaneously preventing excessive wear and seizure in the EHD contacts operating in severe conditions (high pressure and temperature) 1,10,11,[16][17][18] . The novel 2H-WS 2 nanoadditized lubricants were shown to achieve a 30% reduction of hydrogen permeation in bearings compared to the PAO base oil, while also controlling wear and generating smoother wear tracks 19 .…”

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confidence: 99%

Hydrocarbon Lubricants Can Control Hydrogen Embrittlement

Ratoi

Tanaka

Mellor

et al. 2020

Sci Rep

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While it is well known that during Rcf tests the formation of nascent catalytic sites on the wear track can break down hydrocarbon molecules to release atomic hydrogen, the potential of the hydrogen environment in fuel cells to hydrocrack the hydrocarbon lubricant in high pressure rolling contacts has so far been ignored. Here we investigate for the first time the ability of the hydrogen environment to generate a chemical tribofilm on the wear track most likely through lubricant hydrocracking, as compared with argon and air environments. Despite the ability of the hydrogen environment to generate a notably larger amount of atomic hydrogen, the chemical tribofilm significantly prevents the formation of atomic hydrogen and its subsequent diffusion through the lattice of steel rolling element bearings. this is of great importance in the lubrication of hydrogen technology and the prevention of Hydrogen embrittlement (He). An investigation into the prospects of high energy micro-computedtomography (Micro-ct) as a non-destructive technique for sub-surface damage characterisation in Rcf was comparatively performed alongside traditional sectioning methods.

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Study on Rolling Contact Fatigue in Hydrogen Atmosphere - Improvement of Rolling Contact Fatigue Life by Formation of Surface Film -

Cited by 21 publications

References 7 publications

Effect of Environmental Gas on Surface Initiated Rolling Contact Fatigue

Effect of Environmental Gas on Surface Initiated Rolling Contact Fatigue

The Effects of Hydrogen on Microstructural Change and Surface Originated Flaking in Rolling Contact Fatigue

Hydrocarbon Lubricants Can Control Hydrogen Embrittlement

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