Role of Surface Micro-Texturing in Acceleration of Initial Running-in during Lubricated Fretting

Surface texturing is considered to be an effective means of enhancing the properties of a tribological contact not only in a normal uni-directional sliding condition but also in fretting under lubricated conditions. Well-regulated “micro dimples” were formed on a flat surface usi...

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Autores principales:	Tatsuhiro Jibiki, Masayuki Shima, Tomohiro Motoda, Philip Shipway
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2010
Materias:	fretting surface texturing micro texturing surface micro fabrication lubricated condition micro pool dimple pattern 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/bc68993a243542e09d190f94b3130226
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spelling	oai:doaj.org-article:bc68993a243542e09d190f94b31302262021-11-05T09:27:17ZRole of Surface Micro-Texturing in Acceleration of Initial Running-in during Lubricated Fretting1881-219810.2474/trol.5.33https://doaj.org/article/bc68993a243542e09d190f94b31302262010-01-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/5/1/5_1_33/_pdf/-char/enhttps://doaj.org/toc/1881-2198Surface texturing is considered to be an effective means of enhancing the properties of a tribological contact not only in a normal uni-directional sliding condition but also in fretting under lubricated conditions. Well-regulated “micro dimples” were formed on a flat surface using the method of micro fabrication. In this study, a bearing steel (HV760) was used for the specimens with ball-on-flat configuration. The frictional force and relative movement between the specimens were measured simultaneously during fretting with a frequency 7.35 Hz, for fretting up to 2 × 105 cycles under a lubricated condition of 350 neutral oil (typically used for grease lubricated contacts). The normal load, and fretting stroke were varied in the range of 4.9 N to 22.1 N, 12 μm to 215 μm respectively. The initial running-in process (namely, the phenomenon of a significant reduction in the coefficient of friction seen in the early stages of fretting) was the main focus of the study, with comparisons being made between specimens with flat surfaces. The main findings were that a micro texturing surface resulted in a reduced number of cycles to complete the running-in process (when compared to the flat surface), but that the wear scar was wider in the micro texturing surface. It is proposed that the micro texturing surface provides a less stiff contact than the flat surface and that the lubricant can become entrapped in the dimples in the contact, and thus provide enhanced entrainment of the lubricant into the contact.Tatsuhiro JibikiMasayuki ShimaTomohiro MotodaPhilip ShipwayJapanese Society of Tribologistsarticlefrettingsurface texturingmicro texturing surfacemicro fabricationlubricated conditionmicro pooldimple patternPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 5, Iss 1, Pp 33-39 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	fretting surface texturing micro texturing surface micro fabrication lubricated condition micro pool dimple pattern Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	fretting surface texturing micro texturing surface micro fabrication lubricated condition micro pool dimple pattern Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Tatsuhiro Jibiki Masayuki Shima Tomohiro Motoda Philip Shipway Role of Surface Micro-Texturing in Acceleration of Initial Running-in during Lubricated Fretting
description	Surface texturing is considered to be an effective means of enhancing the properties of a tribological contact not only in a normal uni-directional sliding condition but also in fretting under lubricated conditions. Well-regulated “micro dimples” were formed on a flat surface using the method of micro fabrication. In this study, a bearing steel (HV760) was used for the specimens with ball-on-flat configuration. The frictional force and relative movement between the specimens were measured simultaneously during fretting with a frequency 7.35 Hz, for fretting up to 2 × 105 cycles under a lubricated condition of 350 neutral oil (typically used for grease lubricated contacts). The normal load, and fretting stroke were varied in the range of 4.9 N to 22.1 N, 12 μm to 215 μm respectively. The initial running-in process (namely, the phenomenon of a significant reduction in the coefficient of friction seen in the early stages of fretting) was the main focus of the study, with comparisons being made between specimens with flat surfaces. The main findings were that a micro texturing surface resulted in a reduced number of cycles to complete the running-in process (when compared to the flat surface), but that the wear scar was wider in the micro texturing surface. It is proposed that the micro texturing surface provides a less stiff contact than the flat surface and that the lubricant can become entrapped in the dimples in the contact, and thus provide enhanced entrainment of the lubricant into the contact.
format	article
author	Tatsuhiro Jibiki Masayuki Shima Tomohiro Motoda Philip Shipway
author_facet	Tatsuhiro Jibiki Masayuki Shima Tomohiro Motoda Philip Shipway
author_sort	Tatsuhiro Jibiki
title	Role of Surface Micro-Texturing in Acceleration of Initial Running-in during Lubricated Fretting
title_short	Role of Surface Micro-Texturing in Acceleration of Initial Running-in during Lubricated Fretting
title_full	Role of Surface Micro-Texturing in Acceleration of Initial Running-in during Lubricated Fretting
title_fullStr	Role of Surface Micro-Texturing in Acceleration of Initial Running-in during Lubricated Fretting
title_full_unstemmed	Role of Surface Micro-Texturing in Acceleration of Initial Running-in during Lubricated Fretting
title_sort	role of surface micro-texturing in acceleration of initial running-in during lubricated fretting
publisher	Japanese Society of Tribologists
publishDate	2010
url	https://doaj.org/article/bc68993a243542e09d190f94b3130226
work_keys_str_mv	AT tatsuhirojibiki roleofsurfacemicrotexturinginaccelerationofinitialrunninginduringlubricatedfretting AT masayukishima roleofsurfacemicrotexturinginaccelerationofinitialrunninginduringlubricatedfretting AT tomohiromotoda roleofsurfacemicrotexturinginaccelerationofinitialrunninginduringlubricatedfretting AT philipshipway roleofsurfacemicrotexturinginaccelerationofinitialrunninginduringlubricatedfretting
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Role of Surface Micro-Texturing in Acceleration of Initial Running-in during Lubricated Fretting

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