Influence of hydrogen content and microstructure on the fatigue behaviour of steel SAE 52100 in the VHCF regime

Karsch, Torben; Bomas, H.; Zoch, H.‐W.; Mändl, S.

doi:10.1016/j.ijfatigue.2013.09.006

Cited by 33 publications

(25 citation statements)

References 25 publications

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“…155) This applies also to fatigue initiated at oxide inclusions. 156,157) Therefore, inclusions that are weakly bonded to the steel and at the same time initiate fracture because of their size, are not suitable as deliberate hydrogen traps. As emphasised in the introduction, it is the benign traps such as the semi-coherent carbides that should be exploited in this context.…”

Section: Efficacy Of Trapsmentioning

confidence: 99%

Prevention of Hydrogen Embrittlement in Steels

2016

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The essential facts about the nature of the hydrogen embrittlement of steels have now been known for 140 years. It is diffusible hydrogen that is harmful to the toughness of iron. It follows, therefore, that the harmful influence of diffusible hydrogen can be mitigated by preventing its entry into steel or by rendering it immobile once it penetrates the material. This review deals with the methods that might be implemented to design steels and components that resist hydrogen embrittlement by reducing the intake of hydrogen or rendering it innocuous when it does penetrate the steel.

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Section: Efficacy Of Trapsmentioning

confidence: 99%

Prevention of Hydrogen Embrittlement in Steels

2016

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“…Of course, this behavior is directly correlated with the relative changes in hardness after nitrogen insertion. While a direct calculation of the stress distribution is possible for spherical indenters (42) , a clear definition of the onset of fatigue on a nanoscopic scale is much more difficult, if not impossible, whereas the macroscopic failure -in contrast -for conventional bulk material is much more easily to observe and analyze (43) . Here, the direct observation of the onset of fatigue would require detecting a crack within a volume or surface area close to zero or as small as the initial contact area as the stress distribution is highly inhomogeneous.…”

Section: Resultsmentioning

confidence: 99%

Effects of plasma immersion ion implantation on fatigue properties of titanium alloy surfaces

Souza

Fernandes²,

Mändl³

et al. 2018

RBAV

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“…gas chromatography (GC) or hot carrier gas extraction [32]), TDA coupled with a mass spectrometer (TDMS) [10,14,29,33,34] and secondary ion mass spectrometry (SIMS), used to measure the local concentration of hydrogen in specimens and at defects such as inclusions [35,36]. The primary method for measuring hydrogen in weld steels under the BS ISO 3690 [32] has been the mercury method; however, due to the health hazards when using mercury and the long analysis times involved other methods for measuring hydrogen have been exploited.…”

Section: Introductionmentioning

confidence: 99%

Thermal Desorption Analysis of Hydrogen in Non-hydrogen-Charged Rolling Contact Fatigue-Tested 100Cr6 Steel

et al. 2017

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Hydrogen diffusion during rolling contact fatigue (RCF) is considered a potential root cause or accelerator of white etching cracks (WECs) in wind turbine gearbox bearing steels. Hydrogen entry into the bearing steel during operation is thought to occur either through the contact surface itself or through cracks that breach the contact surface, in both cases by the decomposition of lubricant through catalytic reactions and/or tribochemical reactions of water. Thermal desorption analysis (TDA) using two experimental set-ups has been used to measure the hydrogen concentration in non-hydrogen-charged bearings over increasing RCF test durations for the first time. TDA on both instruments revealed that hydrogen diffused into the rolling elements, increasing concentrations being measured for longer test durations, with numerous WECs having formed. On the other hand, across all test durations, negligible concentrations of hydrogen were measured in the raceways, and correspondingly no WECs formed. Evidence for a relationship between hydrogen concentration and either the formation or the acceleration of WECs is shown in the rollers, as WECs increased in number and severity with increasing test duration. It is assumed that hydrogen diffusion occurred at wear-induced nascent surfaces or areas of heterogeneous/patchy tribofilm, since most WECs did not breach the contact surface, and those that did only had very small crack volumes for entry of lubricant to have occurred.

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Influence of hydrogen content and microstructure on the fatigue behaviour of steel SAE 52100 in the VHCF regime

Cited by 33 publications

References 25 publications

Prevention of Hydrogen Embrittlement in Steels

Prevention of Hydrogen Embrittlement in Steels

Effects of plasma immersion ion implantation on fatigue properties of titanium alloy surfaces

Thermal Desorption Analysis of Hydrogen in Non-hydrogen-Charged Rolling Contact Fatigue-Tested 100Cr6 Steel

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