Friction and wear behaviour of dual phase steels in discontinuous sliding contact conditions as a function of sliding speed and contact frequency

Friction and wear rate behaviour of dual phase steel discs (DP600) as a function of sliding speed (0.05–3.75m/s), and contact frequency (0.6–16.5Hz) have been studied under unidirectional ball-on-disc dry sliding conditions. The coefficient of friction (COF) and wear rate exhibit not only a highly d...

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Bibliographic Details
Published in:Tribology international 2015-10, Vol.90, p.32-42
Main Authors: Ruiz-Andres, M., Conde, A., de Damborenea, J., Garcia, I.
Format: Article
Language:English
Subjects:
Contact
Contact frequency
Discs
Duplex stainless steels
Friction
Mathematical models
Oxidative wear
Sliding
Sliding contact
Sliding wear
Steel
Wear
Wear rate
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Summary:Friction and wear rate behaviour of dual phase steel discs (DP600) as a function of sliding speed (0.05–3.75m/s), and contact frequency (0.6–16.5Hz) have been studied under unidirectional ball-on-disc dry sliding conditions. The coefficient of friction (COF) and wear rate exhibit not only a highly dependence on the sliding speed, but also on the contact frequency which appears to be the key factor determining the wear behaviour of the DP600 even at constant sliding speed. The wear mechanism is mainly oxidative. The validity of Garcia–Ramil–Celis model is demonstrated for discontinuous sliding contacts at contact frequencies below 7Hz. However, above 7Hz, the disc behaves as if it were subjected to a continuous sliding contact. •A hidden effect of the contact frequency is identified on ball-on-disc tests.•COF diminishes with the frequency but behaves distinctly with the sliding speed.•A new oxidative wear mechanism for discontinuous sliding contacts is proposed.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2015.03.038