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Title: An analysis of premature cracking associated with microstructural alterations in an AISI 52100 failed wind turbine bearing using X-ray tomography

Abstract

Crack surrounded by local areas of microstructural alteration deemed "White etching cracks" (WECs) lead to unpredictable and premature failures within a multitude of applications including wind turbine gearbox bearings. While the exact cause of these failures remains unknown, a large number of hypotheses exist as to how and why these cracks form. The aim of the current work is to elucidate some of these hypotheses by mapping WEC networks within failed wind turbine bearings using high energy X-ray tomography, in an attempt to determine the location of WEC initiation, and the role of defects within the steel, such as inclusions or carbide clusters. Four completely subsurface WECs were found throughout the presented analysis, thereby confirming subsurface initiation as method of WEC formation. Additionally, a multitude of small butterfly like cracks were found around inclusions in the steel, however further analysis is needed to verify if these inclusions are initiation sites for WECs. (C) 2017 Elsevier Ltd. All rights reserved.

Authors:
ORCiD logo; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Wind and Water Power Technolgoies (WWPTO)
OSTI Identifier:
1411157
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Materials & Design
Additional Journal Information:
Journal Volume: 117; Journal Issue: C; Journal ID: ISSN 0264-1275
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; X-ray tomography; Bearing failures; Microstructural alterations; Premature fatigue; White etching cracks

Citation Formats

Gould, Benjamin, Greco, Aaron, Stadler, Kenred, and Xiao, Xianghui. An analysis of premature cracking associated with microstructural alterations in an AISI 52100 failed wind turbine bearing using X-ray tomography. United States: N. p., 2017. Web. doi:10.1016/j.matdes.2016.12.089.
Gould, Benjamin, Greco, Aaron, Stadler, Kenred, & Xiao, Xianghui. An analysis of premature cracking associated with microstructural alterations in an AISI 52100 failed wind turbine bearing using X-ray tomography. United States. doi:10.1016/j.matdes.2016.12.089.
Gould, Benjamin, Greco, Aaron, Stadler, Kenred, and Xiao, Xianghui. Wed . "An analysis of premature cracking associated with microstructural alterations in an AISI 52100 failed wind turbine bearing using X-ray tomography". United States. doi:10.1016/j.matdes.2016.12.089.
@article{osti_1411157,
title = {An analysis of premature cracking associated with microstructural alterations in an AISI 52100 failed wind turbine bearing using X-ray tomography},
author = {Gould, Benjamin and Greco, Aaron and Stadler, Kenred and Xiao, Xianghui},
abstractNote = {Crack surrounded by local areas of microstructural alteration deemed "White etching cracks" (WECs) lead to unpredictable and premature failures within a multitude of applications including wind turbine gearbox bearings. While the exact cause of these failures remains unknown, a large number of hypotheses exist as to how and why these cracks form. The aim of the current work is to elucidate some of these hypotheses by mapping WEC networks within failed wind turbine bearings using high energy X-ray tomography, in an attempt to determine the location of WEC initiation, and the role of defects within the steel, such as inclusions or carbide clusters. Four completely subsurface WECs were found throughout the presented analysis, thereby confirming subsurface initiation as method of WEC formation. Additionally, a multitude of small butterfly like cracks were found around inclusions in the steel, however further analysis is needed to verify if these inclusions are initiation sites for WECs. (C) 2017 Elsevier Ltd. All rights reserved.},
doi = {10.1016/j.matdes.2016.12.089},
journal = {Materials & Design},
issn = {0264-1275},
number = C,
volume = 117,
place = {United States},
year = {2017},
month = {3}
}