University of Oulu

Jouko Hintikka, Antti Mäntylä, Joona Vaara, Tero Frondelius, Janne Juoksukangas, Arto Lehtovaara, Running-in in fretting, transition from near-stable friction regime to gross sliding, Tribology International, Volume 143, 2020, 106073, ISSN 0301-679X, https://doi.org/10.1016/j.triboint.2019.106073

Running-in in fretting, transition from near-stable friction regime to gross sliding

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Author: Hintikka, Jouko1,2; Mäntylä, Antti1; Vaara, Joona1;
Organizations: 1R&D and Engineering, Wärtsilä, P.O. Box 244, 65101 Vaasa, Finland
2Tribology and Machine Elements, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 589, 33101 Tampere, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2020051128310
Language: English
Published: Elsevier, 2020
Publish Date: 2021-11-21
Description:

Abstract

It has been shown that quenched and tempered steel in gross-sliding fretting conditions, with tens of microns of slip amplitude, leads to fretting induced cracking and high and non-Coulomb friction. At low tangential load levels, there was only insignificant cracking. However, the running condition tends to change from stick to gross-sliding with a slip amplitude of a few micrometres. In this study, novel two-phase fretting experiments were done where quenched and tempered steel contact is run first at low loads that are initially in stick (running-in phase), followed by a gross-sliding phase with a slip amplitude of 35 μm. The results show that gross-sliding phase friction was reduced and the fretting induced cracks were shorter when the running-in phase was done at high enough load level and lasted more than 10⁶ load cycles. At the highest running-in load levels, the resulting crack lengths were approximately halved in comparison to experiments without running-in, and it was possible to achieve nearly ideal Coulomb friction in the gross-sliding phase when the running-in duration was 10.2 × 10⁶ load cycles. It is concluded that it is possible to control fretting-induced friction and cracking by carefully controlled running-in.

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Series: Tribology international
ISSN: 0301-679X
ISSN-E: 1879-2464
ISSN-L: 0301-679X
Volume: 143
Article number: 106073
DOI: 10.1016/j.triboint.2019.106073
OADOI: https://oadoi.org/10.1016/j.triboint.2019.106073
Type of Publication: A1 Journal article – refereed
Field of Science: 214 Mechanical engineering
216 Materials engineering
Subjects:
Funding: This study was conducted as a part of the MaNuMiES (Dnro 3361/31/2015) and WIMMA (Dnro 1566/31/2015) research projects. The authors are grateful for the financial support provided by Business Finland Oy (former Tekes), Wärtsilä Finland Oy, Agco Power Oy, Finland and Global Boiler Works Oy, Finland .
Copyright information: © 2019 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/