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Title: 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:
ORCiD logo [1];  [1];  [2];  [3];  [4];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Applied Materials Division
  2. Afton Chemical Corporation, Richmond, VA (United States)
  3. Afton Chemical Ltd, Bracknell (United Kingdom)
  4. 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), Wind Energy Technologies Office (EE-4WE)
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. doi: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. doi:10.1007/s11249-018-1106-y.
@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 = {2018},
month = {11}
}

Journal Article:
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Works referenced in this record:

Serial sectioning investigation of butterfly and white etching crack (WEC) formation in wind turbine gearbox bearings
journal, April 2013


Solute redistribution in the nanocrystalline structure formed in bearing steels
journal, October 2013


Investigating the Process of White Etching Crack Initiation in Bearing Steel
journal, April 2016


EBSD investigation of the crack initiation and TEM/FIB analyses of the microstructural changes around the cracks formed under Rolling Contact Fatigue (RCF)
journal, March 2010


The Influence of Sliding and Contact Severity on the Generation of White Etching Cracks
journal, October 2015