The Influence of Material Roughness, Hardness and Lubricant Additives on Micropitting Behaviour in Rolling-Sliding Contacts

Regarding micropitting, which is one of the fatigue damages that occur under conditions where the oil film thickness is smaller than the surface roughness, the effects of hardness and roughness of the test piece and differences in lubricants were confirmed. Endurance tests and friction tests were co...

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Autores principales:	Takuya Ohno, René Greschert, Christoph Löpenhaus, Christian Brecher
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2020
Materias:	tribology micropitting roughness hardness lubricant additive oil film thickness lambda ratio Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/d2b39d8c516445a1a6a89638e3f32366
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spelling	oai:doaj.org-article:d2b39d8c516445a1a6a89638e3f323662021-11-05T09:11:46ZThe Influence of Material Roughness, Hardness and Lubricant Additives on Micropitting Behaviour in Rolling-Sliding Contacts1881-219810.2474/trol.15.98https://doaj.org/article/d2b39d8c516445a1a6a89638e3f323662020-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/15/2/15_98/_pdf/-char/enhttps://doaj.org/toc/1881-2198Regarding micropitting, which is one of the fatigue damages that occur under conditions where the oil film thickness is smaller than the surface roughness, the effects of hardness and roughness of the test piece and differences in lubricants were confirmed. Endurance tests and friction tests were conducted using two-disc test rig. On the condition with harder and rougher surface of test pieces, deeper micropits were produced. The phosphorus additive blended oil led to a shallower pit depth than the sulfur additive blended oil. It was further suggested that the friction coefficient had little effect on micropit progress, and the influence of the lambda ratio (ratio of the oil film thickness to the root mean square roughness) after initial running-in was large. In a surface of high hardness and high roughness, micropitting tend to progress more easily. However, it was found out that the progress can be suppressed by suitable lubricants additives.Takuya OhnoRené GreschertChristoph LöpenhausChristian BrecherJapanese Society of Tribologistsarticletribologymicropittingroughnesshardnesslubricantadditiveoil film thicknesslambda ratioPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 15, Iss 2, Pp 98-104 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	tribology micropitting roughness hardness lubricant additive oil film thickness lambda ratio Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	tribology micropitting roughness hardness lubricant additive oil film thickness lambda ratio Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Takuya Ohno René Greschert Christoph Löpenhaus Christian Brecher The Influence of Material Roughness, Hardness and Lubricant Additives on Micropitting Behaviour in Rolling-Sliding Contacts
description	Regarding micropitting, which is one of the fatigue damages that occur under conditions where the oil film thickness is smaller than the surface roughness, the effects of hardness and roughness of the test piece and differences in lubricants were confirmed. Endurance tests and friction tests were conducted using two-disc test rig. On the condition with harder and rougher surface of test pieces, deeper micropits were produced. The phosphorus additive blended oil led to a shallower pit depth than the sulfur additive blended oil. It was further suggested that the friction coefficient had little effect on micropit progress, and the influence of the lambda ratio (ratio of the oil film thickness to the root mean square roughness) after initial running-in was large. In a surface of high hardness and high roughness, micropitting tend to progress more easily. However, it was found out that the progress can be suppressed by suitable lubricants additives.
format	article
author	Takuya Ohno René Greschert Christoph Löpenhaus Christian Brecher
author_facet	Takuya Ohno René Greschert Christoph Löpenhaus Christian Brecher
author_sort	Takuya Ohno
title	The Influence of Material Roughness, Hardness and Lubricant Additives on Micropitting Behaviour in Rolling-Sliding Contacts
title_short	The Influence of Material Roughness, Hardness and Lubricant Additives on Micropitting Behaviour in Rolling-Sliding Contacts
title_full	The Influence of Material Roughness, Hardness and Lubricant Additives on Micropitting Behaviour in Rolling-Sliding Contacts
title_fullStr	The Influence of Material Roughness, Hardness and Lubricant Additives on Micropitting Behaviour in Rolling-Sliding Contacts
title_full_unstemmed	The Influence of Material Roughness, Hardness and Lubricant Additives on Micropitting Behaviour in Rolling-Sliding Contacts
title_sort	influence of material roughness, hardness and lubricant additives on micropitting behaviour in rolling-sliding contacts
publisher	Japanese Society of Tribologists
publishDate	2020
url	https://doaj.org/article/d2b39d8c516445a1a6a89638e3f32366
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The Influence of Material Roughness, Hardness and Lubricant Additives on Micropitting Behaviour in Rolling-Sliding Contacts

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