Influence of MnS inclusion characteristics on generation of white etching cracks in 100Cr6 bearing steel
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in: Wear, Jahrgang 534-535.2023, Nr. 15 December, 205129, 15.12.2023.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Influence of MnS inclusion characteristics on generation of white etching cracks in 100Cr6 bearing steel
AU - Srikakulapu, Kiranbabu
AU - Morsdorf, Lutz
AU - Gonzalez, Ivan
AU - Kölling, Michael
AU - Broß, Christian
AU - Ponge, Dirk
AU - Herbig, Michael
AU - Mayweg, David
N1 - Publisher Copyright: © 2023 Elsevier B.V.
PY - 2023/12/15
Y1 - 2023/12/15
N2 - Wind turbine gearbox (WTGB) bearings suffer from premature failures through white etching cracks (WECs). To investigate causes of this failure mechanism, we tested two types of 100Cr6 bearing steel components. We carried out rolling contact fatigue experiments on standard washers and material extracted from a WTGB bearing. These differed strongly in morphology and orientation of non-metallic inclusions (NMIs) with respect to the raceway, especially of MnS-type. While the standard washer did not exhibit WECs formation, the WTGB bearing did - even under moderate conditions (1.9 GPa Hertzian pressure, 10 7 cycles). We therefore conclude that MnS-inclusions are a key factor in initiation of WECs in WTGB bearings.
AB - Wind turbine gearbox (WTGB) bearings suffer from premature failures through white etching cracks (WECs). To investigate causes of this failure mechanism, we tested two types of 100Cr6 bearing steel components. We carried out rolling contact fatigue experiments on standard washers and material extracted from a WTGB bearing. These differed strongly in morphology and orientation of non-metallic inclusions (NMIs) with respect to the raceway, especially of MnS-type. While the standard washer did not exhibit WECs formation, the WTGB bearing did - even under moderate conditions (1.9 GPa Hertzian pressure, 10 7 cycles). We therefore conclude that MnS-inclusions are a key factor in initiation of WECs in WTGB bearings.
KW - Bearings
KW - Electron microscopy
KW - Rolling contact fatigue
KW - Steel
KW - White etching cracks
UR - http://www.scopus.com/inward/record.url?scp=85171976812&partnerID=8YFLogxK
U2 - 10.1016/j.wear.2023.205129
DO - 10.1016/j.wear.2023.205129
M3 - Article
VL - 534-535.2023
JO - Wear
JF - Wear
SN - 0043-1648
IS - 15 December
M1 - 205129
ER -
