Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Modelling dislocation assisted tempering during rolling contact fatigue in bearing steels
AU - Kang, Jee Hyun
AU - Hosseinkhani, Babak
AU - Vegter, Reinder H.
AU - Rivera-Díaz-Del-Castillo, Pedro E.J.
PY - 2015
Y1 - 2015
N2 - Rolling contact fatigue in bearing steels is manifested by dark-etching regions, which are attributed to deformation induced tempering. In order to quantitatively explain this phenomenon, a model is suggested for martensite tempering assisted by dislocation glide during rolling contact fatigue. In the model, dislocations transport carbon from the matrix to carbide particles, provided that the carbon is located at a certain distance range from the dislocation contributing to the tempering process. By calculating the amount of carbon in the matrix, the kinetics of carbide thickening and hardness reduction are computed. It is found that the dark-etching region kinetics can be controlled by both bearing operation conditions (temperature and deformation rate) and microstructure (type, size, and volume fraction of carbides). The model is validated against tested bearings, and its limitations are discussed.
AB - Rolling contact fatigue in bearing steels is manifested by dark-etching regions, which are attributed to deformation induced tempering. In order to quantitatively explain this phenomenon, a model is suggested for martensite tempering assisted by dislocation glide during rolling contact fatigue. In the model, dislocations transport carbon from the matrix to carbide particles, provided that the carbon is located at a certain distance range from the dislocation contributing to the tempering process. By calculating the amount of carbon in the matrix, the kinetics of carbide thickening and hardness reduction are computed. It is found that the dark-etching region kinetics can be controlled by both bearing operation conditions (temperature and deformation rate) and microstructure (type, size, and volume fraction of carbides). The model is validated against tested bearings, and its limitations are discussed.
KW - Carbide
KW - Cumulative damage
KW - Fatigue modelling
KW - Rolling contact fatigue
KW - Steel
U2 - 10.1016/j.ijfatigue.2015.01.013
DO - 10.1016/j.ijfatigue.2015.01.013
M3 - Journal article
AN - SCOPUS:84924756312
VL - 75
SP - 115
EP - 125
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
ER -