Influence of Slip and Lubrication Regime on the Formation of White Etching Cracks on a Two-Disc Test Rig

Guzmán, Francisco Gutiérrez; Oezel, M.; Jacobs, Georg; Burghardt, Gero; Broeckmann, Christoph; Janitzky, T.

doi:10.3390/lubricants6010008

Cited by 10 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A short explanation of these failure modes can be found in previous work (Cornel et al, 2018). In addition, the following literature is recommended for a more detailed insight (Bongardt, 2015;van Lier, 2015;Gutiérrez Guzmán et al, 2018;Gutiérrez Guzmán et al, 2020).…”

Section: Experimental Methods and Resultsmentioning

confidence: 99%

Condition Monitoring of roller bearings using Acoustic Emission

Cornel¹,

Guzmán²,

Jacobs³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. Roller bearing failures in wind turbines gearboxes lead to long downtimes and high repairing costs, which could be reduced by the implementation of a predictive maintenance strategy. In this paper and within this context an acoustic emission based condition monitoring system is applied to roller bearing test rigs with the aim of identifying critical operating conditions before bearing failures occurs. Furthermore, a comparison regarding detection times is carried out with a traditional vibration based condition monitoring systems, with focus on premature bearing failures such as white etching cracks. The investigations show a sensitivity of the acoustic emission system towards lubricating conditions. In addition, the system has shown, that a damaged surface can be detected at least ~ 4 % (8 hours, regarding the time to failure) earlier than by using the vibration based system. Furthermore, significant deviations from the average acoustic emission signal were detected up to ~ 50 % (130 hours) before the test stop and are possibly related to sub-surface damage initiation and might result in an earlier damage detection in the future.

show abstract

Section: Experimental Methods and Resultsmentioning

confidence: 99%

Condition Monitoring of roller bearings using Acoustic Emission

Cornel¹,

Guzmán²,

Jacobs³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…3 In addition to that, it is reported that more WECs formation is observed in severe boundary lubrication regimes. 20,21 Therefore, all the tests in this work were performed in the dynamic PoD tribometer with severe boundary lubrication conditions at a temperature range of 30 −35°C. This study chooses oils by their base stock without any additives and has similar kinematic viscosity.…”

Section: Experimental Methodologymentioning

confidence: 99%

Lubricant performance against white etching areas (WEAs) formation in AISI 52100 bearing steel under cyclic compressive loading

Linto

Ramkumar

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

Premature bearing failures commonly occur in applications that operate under extreme boundary conditions. The lubrication engineers and tribologists are confronting a key challenge in these bearing failures associated with microstructure decay, such as White Etching Cracks (WECs) and White Etching Areas (WEAs). Lubricant degradation is one of the critical factors for the subsurface decay in the bearing steel. This work evaluates the performance of mineral oil (heavy paraffin oil) and synthetic poly alkyl glycol (PAG) against WEAs formation under pure sliding with cyclic compressive loading. The performance of lubricants was evaluated using Infrared Fourier Transform (FTIR) and Electron Spin Resonance (ESR) spectroscopy. The outcomes reveal that the free radical formation rate is higher for paraffin than PAG. This study found that WEAs formation in the bearing steel is delayed in the PAG tested samples compared to paraffin.

show abstract

“…However, during actual operating conditions of the WTG bearings, SRR would reach up to ±110%, which creates extreme frictional energy accumulation under severe loading conditions. The contact body, which is sliding with lesser surface velocity and traction force acting in the direction of the motion vector, experiences a negative slip [19]. Pure sliding, along with high shear stress, accelerates the formation of WEAs in the bearing subsurface.…”

Section: Samples and Experimental Parametersmentioning

confidence: 99%

Experimental investigation on the performance of AISI 440C martensitic stainless steel against the formation of white etching areas under sliding dynamic loading

Linto

Ramkumar

2021

Tribology - Materials, Surfaces & Interfaces

View full text Add to dashboard Cite

Bearings fail prematurely in transient operating conditions, as a result of flaking that causes changes in subsurface microstructure. In this type of failure, the formation of White Etching Cracks (WECs) is preceded by the formation of White Etching Areas (WEAs). Typically the WEAs are formed due to the dissolution of cementite into the matrix in AISI 52100 bearing steel. This feasibility work investigates the performance of AISI 440C steel against WEAs formation using dynamic load Pin-on-Disc tribometer. Experiments were performed at 4.5 Hz loading frequency, Hertzian pressure 2.02 GPa and sliding velocity of 0.2 ms-1 under the boundary lubrication using Poly Alpha Olefins (PAO). From post-test analysis, it is found that AISI 440C steel trapped more hydrogen than AISI 52100 bearing steel. The comprehensive analysis of materials and lubricants revealed that the performance of AISI 440C stainless steel against WEAs formation is better than that of AISI 52100 bearing steel.

show abstract

Influence of Slip and Lubrication Regime on the Formation of White Etching Cracks on a Two-Disc Test Rig

Cited by 10 publications

References 18 publications

Condition Monitoring of roller bearings using Acoustic Emission

Condition Monitoring of roller bearings using Acoustic Emission

Lubricant performance against white etching areas (WEAs) formation in AISI 52100 bearing steel under cyclic compressive loading

Experimental investigation on the performance of AISI 440C martensitic stainless steel against the formation of white etching areas under sliding dynamic loading

Contact Info

Product

Resources

About