PSI - Issue 42

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

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Procedia Structural Integrity 42 (2022) 1169–1176

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 It was found that under boundary lubrication, initiation of micropitting took place in almost all test runs. However, once the adhesive wear mechanism activated at a higher contact cycle, the initially formed micropitted area started to wipe off. Moreover, for an extended test period and high sliding, wear volume is almost similar irrespective of SRR. Later, a surface treatment was studied, which was found effective in delaying the micropitting initiation by improving the tribological parameters compared to the untreated samples. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: Micropitting; Gears; Rolling Contact Fatigue, Surface Treatment; Boundary Lubrication 23 European Conference on Fracture - ECF23 Study of wear and micropitting in rolling/sliding contacts operating under boundary lubrication conditions Mushfiq Hasan a,b, *, Omar D. Mohammed b,c , Christian Kolar d , Marcus Björling a , Roland Larsson a a Division of Machine Elements, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, Sweden b CAE Motion, China-Euro Vehicle Technology CEVT, Gothenburg, Sweden c Mechanical Engineering Department, Prince Mohammad Bin Fahd University, Al-Khobar, KSA. d Applied Nano Surfaces Sweden (Tribonex) AB, Uppsala, Sweden Abstract Rolling contact fatigue is a common failure mode in gears and bearings. However, this failure mode is getting greater attention due to the increasing tendency to use lower viscosity lubricants to reduce losses. Though several types of research have been done over the past decades, there are still scopes for further investigations. This study aims to study the effect of the slide to roll ratios (SRR), surface roughness and surface treatment on wear and pitting behaviour under realistic contact conditions. Fatigue and wear damages were quantified by studying the surface topography alteration at different contact cycle intervals.

* Corresponding author. Tel.: +46 (0)920 491387; fax: +46 (0)920 491387 E-mail address: mushfiq.hasan@ltu.se

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.149