Micro-Pitting and Wear Assessment of PAO vs Mineral-Based Engine Oil Operating under Mixed Lubrication Conditions: Effects of Lambda, Roughness Lay and Sliding Direction

Autor:	Pär Marklund, Tobias Hultqvist, Aleks Vrček, Yannick Baubet, Marcus Björling, Roland Larsson
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Materials science Mineral ZDDP Mechanical Engineering Metallurgy chemistry.chemical_element Zinc Surface finish surface-initiated fatigue Surfaces Coatings and Films Micro pitting mild wear chemistry Lubrication lcsh:Q lcsh:Science micro-pitting
Zdroj:	Lubricants Volume 7 Issue 5 Lubricants, Vol 7, Iss 5, p 42 (2019)
ISSN:	2075-4442
DOI:	10.3390/lubricants7050042
Popis:	Under certain operating conditions, rolling contacts have been shown to experience some challenges when lubricated with engine oils containing zinc dialkyldithophosphate (ZDDP) anti-wear additive. In order to better understand the main damage mechanisms during various operating conditions, further studies are needed. This article studies micro-pitting and wear damages of bearing steel surfaces under mixed lubrication conditions in a ball-on-disc setup, lubricated with different engine oils. Based on the results, micro-pitting and wear damage is shown to be highly case-dependent. In general, PAO-based engine oil tends to eliminate micro-pitting damage compared to mineral-based engine oil at less severe lubricating conditions. Moreover, a critical lambda was found for both oils, where the highest micro-pitting damage was observed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c31d0cddc1d7083cfc5a8519ce84cfd3 Zobrazit plný text záznamu