The effect of hydrogen and contact pressure on the sequence of microstructural changes during bearing operation has been investigated. The continuation of bearing testing in the presence of microcracks stimulates the formation of (1) white-etching matter (WEM) on the crack surfaces that endure severe surface rubbing, (2) slip bands in the regions that experience higher stress levels due to microcrack formation and (3) engineering bands within the WEM. Engineering bands are a new observation whereby ferrite crystals cross a multitude of fine grains (WEM). The presence of hydrogen and high contact pressure during the bearing tests led to early bearing failure, but with the formation of large crack networks that coexist with slip bands, precursors to WEM and conventional WEM.
TamadaK, TanakaH. Occurrence of brittle flaking on bearings used for automotive electrical instruments and auxiliary devices. Wear. 1996;199:245–252. doi: 10.1016/0043-1648(96)06990-6
2.
TamadaK, TanakaH, TsushimaN. A new type of flaking failure in bearings for electrical instruments of automotive engines, In: Hoo JJC, Green EB, editors. Bearing steels: into the 21st century. Vol. 1327. West Conshohocken (PA): American Society for Testing and Materials; 1998. p. 167–185.
3.
IsoK, YokouchiA, TakemuraH. Research work for clarifying the mechanism of white structure flaking and extending the life of bearings. SAE Technical Papers, 2005, 2005-01-1868. doi: 10.4271/2005-01-1868.
4.
EvansM-H. An updated review: white etching cracks (WECs) and axial cracks in wind turbine gearbox bearings. Mater Sci Technol. 2016;32:1133–1169. doi: 10.1080/02670836.2015.1133022
5.
EvansM-H. White structure flaking (WSF) in wind turbine gearbox bearings: Effects of ‘butterflies’ and white etching cracks (WECs). Mater Sci Technol. 2012;28:3–22. doi: 10.1179/026708311X13135950699254
6.
UyamaH, YamadaH. White structure flaking in rolling bearings for wind turbine gearboxes. Wind Syst. 2014;28:14–25.
7.
StadlerK, LaiJ, VegterRH. A review: the dilemma with premature white etching crack (WEC) bearing failures. In: Beswick JM, editor. Bearing steel technologies: 10th Volume, Advances in steel technologies for rolling bearings. West Conshohocken (PA): ASTM International; 2015, STP 1580, p. 487–508.
8.
BhadeshiaHKDH, Solano-AlvarezW. Critical assessment 13: elimination of white etching matter in bearing steels. Mater Sci Technol. 2015;31:1011–1015. doi: 10.1179/1743284715Y.0000000036
9.
UyamaH, YamadaH, HidakaH, et al. The effects of hydrogen on microstructural change and surface originated flaking in rolling contact fatigue. Tribol Online. 2011;6:123–132. doi: 10.2474/trol.6.123
10.
HanB, ZhouBX, PasaribuR. C-ring hydrogen induced stress corrosion cracking (HISCC) tests in lubricating liquid media. In: Annergren I, editor. European corrosion congress. Stockholm: KIMAB; 2011, Vol. 1, p. 615–623.
11.
KotzalasMN, DollGL. Tribological advancements for reliable wind turbine performance. Philos Trans R Soc A. 2010;368:4829–4850. doi: 10.1098/rsta.2010.0194
12.
CirunaJA, SzieleitHJ. The effect of hydrogen on the rolling contact fatigue life of AISI 52100 and 440C steel balls. Wear. 1973;24:107–118. doi: 10.1016/0043-1648(73)90207-X
13.
VegterRH, SlyckeJT. The role of hydrogen on rolling contact fatigue response of rolling element bearings. J ASTM Int. 2010;7:ID JAI 102543. doi: 10.1520/JAI102543
14.
WestOHE, DiederichsAM, AlimadadiH, et al. Application of complementary techniques for advanced characterization of white etching cracks. Prakt Metallogr/Pract Metallogr. 2013;50:410–431. doi: 10.3139/147.110246
15.
IvanisenkoY, LojkowskiW, ValievRZ, et al. The mechanism of formation of nanostructure and dissolution of cementite in a pearlitic steel during high pressure torsion. Acta Mater. 2003;51:5555–5570. doi: 10.1016/S1359-6454(03)00419-1
16.
HongMH, ReynoldsWTJr., TaruiT, . Atom probe and transmission electron microscopy investigations of heavily drawn pearlitic steel wire. Metall Mater Trans A. 1999;30:717–727. doi: 10.1007/s11661-999-1003-y
17.
OhsakiS, HonoK, HidakaH, et al. Characterization of nanocrystalline ferrite produced by mechanical milling of pearlitic steel. Scr Mater. 2005;52:271–276. doi: 10.1016/j.scriptamat.2004.10.020
18.
EvansM-H, RichardsonAD, WangL, et al. Serial sectioning investigation of butterfly and white etching crack (WEC) formation in wind turbine gearbox bearings. Wear. 2013;302:1573–1582. doi: 10.1016/j.wear.2012.12.031
19.
ErrichelloR, BudnyR, EckertR. Investigations of bearing failures associated with white etching areas (WEAs) in wind turbine gearboxes. Tribol Trans. 2013;56:1069–1076. doi: 10.1080/10402004.2013.823531
20.
HiraokaK, NagaoM, IsomotoT. Study of flaking process in bearings by white etching area generation. J ASTM Int. 2007;3:234–240.
21.
AndersonPM, FleckNA, JohnsonKL. Localization of plastic deformation in shear due to microcracks. J Mech Phys Solids. 1990;38:681–699. doi: 10.1016/0022-5096(90)90028-3
22.
Solano-AlvarezW, BhadeshiaHKDH. White-etching matter in bearing steel. Part I: controlled cracking of 52100 steel. Metall Mater Trans A. 2014;45:4907–4915. doi: 10.1007/s11661-014-2430-y
23.
Solano-AlvarezW, BhadeshiaHKDH. White-etching matter in bearing steel. Part II: distinguishing cause and effect in bearing steel failure. Metall Mater Trans A. 2014;45:4916–4931. doi: 10.1007/s11661-014-2431-x
24.
GrabulovA, PetrovR, ZandbergenHW. EBSD investigation of the crack initiation and TEM/FIB analyses of the microstructural changes around the cracks formed under rolling contact fatigue (RCF). Int J Fatigue. 2010;32:576–583. doi: 10.1016/j.ijfatigue.2009.07.002
25.
KangJ-H, HosseinkhaniB, WilliamsCA, et al. Solute redistribution in the nanocrystalline structure formed in bearing steels. Scr Mater. 2013;69:630–633. doi: 10.1016/j.scriptamat.2013.07.017
26.
HiraoecaK. White-type microstructural change in rolling contact fatigue from the viewpoint of severe plastic deformation. Tetsu-To-Hagane/J Iron Steel Instit Japan. 2008;94:636–643. doi: 10.2355/tetsutohagane.94.636
27.
JanakiramanS, KlitP, JensenNS, et al. Observations on the effects of grooved surfaces on the interfacial torque in highly loaded rolling and sliding tests. Tribol Int. 2015;81:179–189. doi: 10.1016/j.triboint.2014.08.015
28.
GrabulovA, ZieseU, ZandbergenHW. TEM/SEM investigation of microstructural changes within the white etching area under rolling contact fatigue and 3-D crack reconstruction by focused ion beam. Scr Mater. 2007;57:635–638. doi: 10.1016/j.scriptamat.2007.06.024
29.
BeckerPC. Microstructural changes around non-metallic inclusions caused by rolling-contact fatigue of ball-bearing steels. Metals Technol. 1981;8:234–243. doi: 10.1179/030716981803275415
30.
EwingJA, HumfreyJCW. The fracture of metals under repeated alternations of stress. Philos Trans R Soc London A: Math Phys Eng Sci. 1903;200(321–330):241–250. doi: 10.1098/rsta.1903.0006
31.
EvansM-H, RichardsonAD, WangL, et al. Confirming subsurface initiation at non-metallic inclusions as one mechanism for white etching crack (WEC) formation. Tribol Int. 2014;75:87–97. doi: 10.1016/j.triboint.2014.03.012
32.
LundTB. Sub-surface initiated rolling contact fatigue—influence of non-metallic inclusions, processing history, and operating conditions. J ASTM Int. 2010;7:JAI102559. doi: 10.1520/JAI102559
33.
DuCrehuAR. Tribological analysis of White Etching Crack (WEC) failures in rolling element bearings [PhD thesis]. France: L'Institut National des Sciences Appliquées de Lyon; 2014.
