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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
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0003-2772-4861
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0002-7285-6639
SKF Engineering & Research Centre, Nieuwegein, The Netherlands.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0002-4271-0380
Vise andre og tillknytning
2019 (engelsk)Inngår i: Lubricants, E-ISSN 2075-4442, Vol. 7, nr 5, artikkel-id 42Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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. 

sted, utgiver, år, opplag, sider
MDPI, 2019. Vol. 7, nr 5, artikkel-id 42
Emneord [en]
micro-pitting, ZDDP, mild wear, surface-initiated fatigue
HSV kategori
Forskningsprogram
Maskinelement
Identifikatorer
URN: urn:nbn:se:ltu:diva-75059DOI: 10.3390/lubricants7050042ISI: 000470959700003Scopus ID: 2-s2.0-85066431252OAI: oai:DiVA.org:ltu-75059DiVA, id: diva2:1331603
Merknad

Validerad;2019;Nivå 2;2019-06-27 (johcin)

Tilgjengelig fra: 2019-06-27 Laget: 2019-06-27 Sist oppdatert: 2019-06-27bibliografisk kontrollert

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