Combined effect of boundary layer formation and surface smoothing on friction and wear rate of lubricated point contacts during normal running-in processes

Yazhao ZHANG; Alexander KOVALEV; Yonggang MENG

doi:10.1007/s40544-018-0228-4

Friction 2018, 6(3): 274-288 https://doi.org/10.1007/s40544-018-0228-4

Research Article |

Open Access | Issue | Published: 06 September 2018

Combined effect of boundary layer formation and surface smoothing on friction and wear rate of lubricated point contacts during normal running-in processes

Show Author's Information Hide Author's Information Yazhao ZHANG, Alexander KOVALEV, Yonggang MENG(

)

State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China

Keywords:

running-in, bearing area curves, friction modeling, wear modeling, mixed lubrication

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ZHANG Y, KOVALEV A, MENG Y. Combined effect of boundary layer formation and surface smoothing on friction and wear rate of lubricated point contacts during normal running-in processes. Friction, 2018, 6(3): 274-288. https://doi.org/10.1007/s40544-018-0228-4

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Abstract

The combined effect of boundary layer formation and surface smoothing on friction and wear rate of metallic surfaces under lubricated point contact condition was investigated. The double trend of friction coefficient variations was revealed during running-in and sub-running-in processes. The evolution of surface topography was measured on-site using white-light interference profilometer and analyzed using bearing area curves. Comprehensive theoretical equations that explicitly express the contributions of boundary friction, adhesive friction and wear have been derived, and results obtained by these equations were compared with experimental observations. It is concluded that the theoretical models are quantitatively adequate to describe the combined effect of surface smoothing due to mechanical wear and formation of boundary films on the changes in friction and wear rate during normal running-in processes.

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Combined effect of boundary layer formation and surface smoothing on friction and wear rate of lubricated point contacts during normal running-in processes

Show Author's information Hide Author's Information Yazhao ZHANG, Alexander KOVALEV, Yonggang MENG(

)

State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China

Abstract

Keywords: running-in, bearing area curves, friction modeling, wear modeling, mixed lubrication

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Acknowledgements

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Publication history

Received: 05 April 2018

Revised: 26 June 2018

Accepted: 29 June 2018

Published: 06 September 2018

Issue date: September 2018

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Acknowledgements

This work was partially supported by NSFC under grant No. 51635009 and by the State Administration of Foreign Expert Affairs under grant No. DL2017QHDX001.

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This article is published with open access at Springerlink.com

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