Influence of MnS inclusion characteristics on generation of white etching cracks in 100Cr6 bearing steel
Artikel i vetenskaplig tidskrift, 2023
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, 107 cycles). We therefore conclude that MnS-inclusions are a key factor in initiation of WECs in WTGB bearings.
Electron microscopy
Steel
White etching cracks
Rolling contact fatigue
Bearings
Författare
Srikakulapu Kiranbabu
Montanuniversität Leoben
Max-Planck-Gesellschaft
Lutz Morsdorf
Max-Planck-Gesellschaft
Ivan Gonzalez
Max-Planck-Gesellschaft
Michael Kölling
Max-Planck-Gesellschaft
Christian Broß
Max-Planck-Gesellschaft
Dirk Ponge
Max-Planck-Gesellschaft
Michael Herbig
Max-Planck-Gesellschaft
David Mayweg
Chalmers, Fysik, Mikrostrukturfysik
Max-Planck-Gesellschaft
Wear
0043-1648 (ISSN)
Vol. 534-535 205129Ämneskategorier
Tribologi
Bearbetnings-, yt- och fogningsteknik
Metallurgi och metalliska material
DOI
10.1016/j.wear.2023.205129