Strain-induced martensite decay in bearing steels under rolling contact fatigue: modelling and atomic-scale characterisation
Strain-induced martensite decay in bearing steels under rolling contact fatigue: modelling and atomic-scale characterisation
Martensite decay in bearing steels manifested as dark etching regions (DERs) under rolling contact fatigue (RCF) is modelled. The proposed model is established based on a dislocation-assisted carbon migration mechanism. The proposed model is capable of predicting the progress of DER formation and the corresponding mechanical property evolution with increasing number of cycles, in good agreement with the experimental data reported throughout seventy years. The effects of RCF testing conditions on DER formation are studied and a useful tool, DER% maps, is developed for illustrating the temperature, contact pressure and number of cycles for DER occurrence. Moreover, an atom probe tomography study is carried out, revealing the nature of DER ferrite and obtaining strong evidence supporting the postulated DER formation mechanism. The successful application of the dislocation assisted carbon migration mechanism to DER formation provides a plausible explanation to the phenomenon of martensite decay under rolling contact fatigue.
Atom probe tomography, Fatigue modelling, Martensite decay, Microstructural alteration, Rolling contact fatigue
163-173
Fu, Hanwei
5bfa8370-2f21-436c-8c78-ce414d925d94
Song, Wenwen
c9d32a8a-3372-49e3-a8ee-f9d4702de857
Galindo-Nava, Enrique I.
55a2bf00-0903-414e-8ab6-e26d143a9af3
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
12 August 2017
Fu, Hanwei
5bfa8370-2f21-436c-8c78-ce414d925d94
Song, Wenwen
c9d32a8a-3372-49e3-a8ee-f9d4702de857
Galindo-Nava, Enrique I.
55a2bf00-0903-414e-8ab6-e26d143a9af3
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Fu, Hanwei, Song, Wenwen, Galindo-Nava, Enrique I. and Rivera-Díaz-del-Castillo, Pedro E.J.
(2017)
Strain-induced martensite decay in bearing steels under rolling contact fatigue: modelling and atomic-scale characterisation.
Acta Materialia, 139, .
(doi:10.1016/j.actamat.2017.08.005).
Abstract
Martensite decay in bearing steels manifested as dark etching regions (DERs) under rolling contact fatigue (RCF) is modelled. The proposed model is established based on a dislocation-assisted carbon migration mechanism. The proposed model is capable of predicting the progress of DER formation and the corresponding mechanical property evolution with increasing number of cycles, in good agreement with the experimental data reported throughout seventy years. The effects of RCF testing conditions on DER formation are studied and a useful tool, DER% maps, is developed for illustrating the temperature, contact pressure and number of cycles for DER occurrence. Moreover, an atom probe tomography study is carried out, revealing the nature of DER ferrite and obtaining strong evidence supporting the postulated DER formation mechanism. The successful application of the dislocation assisted carbon migration mechanism to DER formation provides a plausible explanation to the phenomenon of martensite decay under rolling contact fatigue.
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More information
Accepted/In Press date: 3 August 2017
e-pub ahead of print date: 8 August 2017
Published date: 12 August 2017
Keywords:
Atom probe tomography, Fatigue modelling, Martensite decay, Microstructural alteration, Rolling contact fatigue
Identifiers
Local EPrints ID: 492334
URI: http://eprints.soton.ac.uk/id/eprint/492334
ISSN: 1359-6454
PURE UUID: 12b84047-0c67-46e5-8ff0-6f781618e3b2
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Date deposited: 24 Jul 2024 16:36
Last modified: 25 Jul 2024 02:06
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Contributors
Author:
Hanwei Fu
Author:
Wenwen Song
Author:
Enrique I. Galindo-Nava
Author:
Pedro E.J. Rivera-Díaz-del-Castillo
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