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

Uyama, Hideyuki; Yamada, Hiroki; Hidaka, Hideyuki; Mitamura, Nobuaki

doi:10.2474/trol.6.123

Cited by 80 publications

(80 citation statements)

References 26 publications

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“…This will cause serious problems in critical components such as bearings [4][5][6][10][11][12][13][14][15][16]. Uyama et al [6] and Ciruna et al [3] observed that hydrogen content in the AISI 52100 bearing steel is one of the prime reasons for reduced bearing life. They found that fatigue life of AISI 52100 bearing steel ball is inversely related to the hydrogen content in the steel.…”

Section: Introductionmentioning

confidence: 99%

“…They correlated the reduction of fatigue life of the bearing steel (from 10 6 to 10 3 revolutions) with presence of 4 ppm hydrogen in the steel. Uyama et al [6] proved that increasing hydrogen content in the steel from 0.03 mass-ppm to 1.2 mass-ppm, decreases steel fatigue life more than one order of magnitude. They pointed out that the shorter life of hydrogen-charged samples is due to the acceleration of the localised microstructural changes under rolling contact fatigue tests.…”

Section: Introductionmentioning

confidence: 99%

“…Steel alloys are susceptible to a loss in steel ductility and premature failure at lower stress concentrations in the presence of hydrogen. It has been demonstrated by several investigators that the steel fatigue life significantly shortens due to the presence of hydrogen [2][3][4][5][6]. Hydrogen atoms can easily penetrate into the steel due to their extremely small size.…”

Section: Introductionmentioning

confidence: 99%

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Development of a novel in-situ technique for hydrogen uptake evaluation from a lubricated tribocontact

Esfahani

Morina

Han³

et al. 2017

Tribology International

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Development of a novel in-situ technique for hydrogen uptake evaluation from a lubricated tribocontact, Tribiology International, http://dx.doi.org/10. 1016/j.triboint.2017.01.019 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of a novel in-situ technique for hydrogen uptake evaluation from a lubricated tribocontact

Esfahani

Morina

Han³

et al. 2017

Tribology International

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“…However, the mechanical properties of SUJ2 were reported to deteriorate due to rolling contact fatigue induced by hydrogen. 1,2) A white etching area (WEA) was observed on the fracture surface due to rolling contact fatigue, which was presumably associated with hydrogen embrittlement. In experiments to reproduce WEA in rolling contact fatigue tests, it was reported that WEA formation was associated with phase transformation of the retained austenite phase (γ R ), with the result that a number of voids were formed on the interfaces between martensite and γ R .…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Embrittlement and Local Characterization at Crack Initiation Associated with Phase Transformation of High-strength Steel Containing Retained Austenite

et al. 2018

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States of hydrogen present in high-strength steels for use as bearing steel SUJ2 and hydrogen embrittlement susceptibility were examined using thermal desorption analysis (TDA) and tensile tests. SUJ2 specimens containing the retained austenite phase (γ R ) in the martensitic phase exhibited three hydrogen desorption peaks in the TDA profile. Two of the peaks desorbed at higher temperatures decreased with a decreasing amount of γ R , indicating they corresponded to desorption associated with γ R . Fracture strength in the presence of hydrogen increased with a decreasing amount of γ R and with an increasing strain rate. For the specimens containing γ R and hydrogen, a flat facet at the crack initiation site and a quasi-cleavage (QC) fracture in the initial crack propagation area were observed on the fracture surface. Local characterization using electron back-scattered diffraction (EBSD) revealed that the flat facet on the fracture surface corresponded not to γ R but to strain-induced martensite. In addition, the facet was on the {112} plane of martensite, which is the slip plane or deformation twin plane of body-centered-cubic metals. The reason for high hydrogen embrittlement susceptibility of the specimens containing γ R was attributed to the straininduced phase transformation at the crack initiation site of the flat facet and in the initial crack propagation area of the QC fracture. Furthermore, the strain rate dependency of hydrogen embrittlement susceptibility is presumably ascribable to local plastic deformation, i.e., the interaction between dislocations and hydrogen.

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“…Undoubtedly, previous studies have showed the RCF would reduce the life and reliability of many useful components, such as gears, rolling bearings [4][5][6]. Nagao M find the stiffness of an inclusion and its location have a significant effect on the RCF life, stiffer inclusions and inclusions located at the depth of maximum shear stress reversal are more detrimental to the RCF life [7].T.Karsch studied the effects of hydrogen content and microstructure on fatigue behavior of steel GCr15 in the VHCF regime [8],and it is found that increased hydrogen content in bearing steel at 5 ppm (by weight) will significantly promote bearing spalling failure [9,10]. Shigeo shmizu's studies show that the bearing fatigue life is directly related to the instantaneous contact time, with the increase of the instantaneous contact time, the fatigue life is also increased [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of banded carbide structure on the rolling contact fatigue of GCr15 bearing steel

Li¹,

Zhang²

2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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In this paper, the influence of banded carbide structure on Rolling Contact Fatigue (RCF) of GCr15 bearing steel was investigated by using MMS-2A double-roller wear tester under dry friction at room temperature. Surface damage was characterized using SEM and OM. The results showed that with the increase of banded carbide grade, wear rate and friction coefficient were obviously increased and contact fatigue performance was deteriorated. For the high grade of banded carbide, the main failure form is fatigue pits and surface cracks. On the contrary, for the low grade of banded carbide, the main failure form is flaking off. Besides, with the increment of banded carbide grade, the thickness of plastic deformation layer increase. The fatigue cracks easy propagated in the plastic deformation layer along the rolling direction. Therefore, by reducing the banded carbide grade can effectively improve the rolling contact fatigue properties of bearing steel. Key words: GCr15 bearing steel; banded carbide; RCF 1.IntroductionBearing balls and rolling-element bearings experience subsurface initiated fatigue failures due to RCF.The bearings used in practical applications are designed to operate at nominal stress levels well below the yield strengths of the materials. However, the presence of imperfections and non-metallic inclusions introduces heterogeneity at the microstructural level [1].With increasing in number of cycles, the ratcheting strain accrues, and therefore it can serve as a meaningful parameter to quantify the evolution of a material damage due to RCF [2,3].Once this damage reaches a critical value, a fatigue crack nucleates in the subsurface of a material. Since this local plastic strain accumulation takes place in the vicinity of carbides, it is important to understand their role towards ratcheting under RCF loading conditions. Generally, the influence factors of RCF failure of bearing steel is non-metallic inclusion, distribution of carbide and purity of steel. Undoubtedly, previous studies have showed the RCF would reduce the life and reliability of many useful components, such as gears, rolling bearings [4][5][6]. Nagao M find the stiffness of an inclusion and its location have a significant effect on the RCF life, stiffer inclusions and inclusions located at the depth of maximum shear stress reversal are more detrimental to the RCF life [7].T.Karsch studied the effects of hydrogen content and microstructure on fatigue behavior of steel GCr15 in the VHCF regime [8],and it is found that increased hydrogen content in bearing steel at 5 ppm (by weight) will significantly promote bearing spalling failure [9,10]. Shigeo shmizu's studies show that the bearing fatigue life is directly related to the instantaneous contact time, with the increase of the instantaneous contact time, the fatigue life is also increased [11]. O.P.Datsyshyn introduced the mechanism of fatigue crack propagation in metallic materials [12]. G.John put forward the using of bearing steel under normal conditions, due

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

Cited by 80 publications

References 26 publications

Development of a novel in-situ technique for hydrogen uptake evaluation from a lubricated tribocontact

Development of a novel in-situ technique for hydrogen uptake evaluation from a lubricated tribocontact

Hydrogen Embrittlement and Local Characterization at Crack Initiation Associated with Phase Transformation of High-strength Steel Containing Retained Austenite

Effect of banded carbide structure on the rolling contact fatigue of GCr15 bearing steel

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