The Effect of Lubricant Composition on White Etching Crack Failures
Abstract
White etching cracks (WECs) are the dominant mode of failure for wind turbine gearbox bearings. These failures are characterized by subsurface initiation and local region of microstructural alterations adjacent to the crack faces. The definitive cause of WECs within the field is unknown, because of this laboratory replication has proved difficult. At a benchtop scale, specific lubricant formulations referred to as bad reference oils (BROs) are often employed to aid in the formation of WECs; however, exactly how these lubricants induce WECs is unknown. The present work intends to elucidate how these lubricants facilitate the formation of WECs by systematically varying the additives which are found in BROs and studying the effect that these additive combinations have on time until failure, as well as tribofilm development. It was found that the lubricant containing Zinc dialkyldithiophosphate alone led to the formation of WECs sooner than any lubricant studied. It was also documented that a lubricants frictional characteristics play a more dominant role than the tribofilm characteristics.
- Authors:
-
[1];
- Argonne National Lab. (ANL), Argonne, IL (United States). Applied Materials Division
- Afton Chemical Corporation, Richmond, VA (United States)
- Afton Chemical Ltd, Bracknell (United Kingdom)
- Ingram Tribology Ltd, Carmarthen (United Kingdom)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
- OSTI Identifier:
- 1496824
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Tribology Letters
- Additional Journal Information:
- Journal Volume: 67; Journal Issue: 1; Journal ID: ISSN 1023-8883
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; bearing failures; microstructural alterations; premature fatigue; white etching cracks
Citation Formats
Gould, Benjamin, Demas, Nicholaos G., Pollard, Grant, Rydel, Jakub Jelita, Ingram, Marc, and Greco, Aaron C. The Effect of Lubricant Composition on White Etching Crack Failures. United States: N. p., 2018.
Web. doi:10.1007/s11249-018-1106-y.
Gould, Benjamin, Demas, Nicholaos G., Pollard, Grant, Rydel, Jakub Jelita, Ingram, Marc, & Greco, Aaron C. The Effect of Lubricant Composition on White Etching Crack Failures. United States. https://doi.org/10.1007/s11249-018-1106-y
Gould, Benjamin, Demas, Nicholaos G., Pollard, Grant, Rydel, Jakub Jelita, Ingram, Marc, and Greco, Aaron C. Thu .
"The Effect of Lubricant Composition on White Etching Crack Failures". United States. https://doi.org/10.1007/s11249-018-1106-y. https://www.osti.gov/servlets/purl/1496824.
@article{osti_1496824,
title = {The Effect of Lubricant Composition on White Etching Crack Failures},
author = {Gould, Benjamin and Demas, Nicholaos G. and Pollard, Grant and Rydel, Jakub Jelita and Ingram, Marc and Greco, Aaron C.},
abstractNote = {White etching cracks (WECs) are the dominant mode of failure for wind turbine gearbox bearings. These failures are characterized by subsurface initiation and local region of microstructural alterations adjacent to the crack faces. The definitive cause of WECs within the field is unknown, because of this laboratory replication has proved difficult. At a benchtop scale, specific lubricant formulations referred to as bad reference oils (BROs) are often employed to aid in the formation of WECs; however, exactly how these lubricants induce WECs is unknown. The present work intends to elucidate how these lubricants facilitate the formation of WECs by systematically varying the additives which are found in BROs and studying the effect that these additive combinations have on time until failure, as well as tribofilm development. It was found that the lubricant containing Zinc dialkyldithiophosphate alone led to the formation of WECs sooner than any lubricant studied. It was also documented that a lubricants frictional characteristics play a more dominant role than the tribofilm characteristics.},
doi = {10.1007/s11249-018-1106-y},
journal = {Tribology Letters},
number = 1,
volume = 67,
place = {United States},
year = {Thu Nov 29 00:00:00 EST 2018},
month = {Thu Nov 29 00:00:00 EST 2018}
}
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Works referencing / citing this record:
Tribochemical degradation of vacuum‐stable lubricants: A comparative study between multialkylated cyclopentane and perfluoropolyether in a vacuum ball‐on‐disc and full‐bearing tests
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