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80429

TEMPER COLOURS OF WEAR PARTICLES

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Last updated: 25 Dec 2024

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Abstract

ABSTRACT
In the present work, wear particles, retained by oil filter of an internal combustion engine, were examined by optical microscope to reveal details of size, shape and quantity of particles. The temperature of the moving surfaces inside engines can be determined by observing the temper colours of the wear particles. Because of the electronic mechanism of oxidation, the optical interference of the oxide film formed on the surfaces of wear particles can give rise to the appearance of colours depending on the thickness of the film. The rate of oxidation and therefore the thickness of the oxide film is determined by the crystallographic orientation of the substrate metal.
 
Based on the observations in the present work, it can be suggested that the sliding surfaces of the engine were suffered from severe micro-cutting process. The presence of the surface striations confirms the evidence of abrasive wear, where the rise of temperature might be attributed to the severe friction and the micro-cutting process caused by excessive abrasive particles contaminated in the lubricant and embedded in the sliding surfaces. The change of the temper colours of wear particles might be from temperature rise caused by extra friction as well as the abrading action of abrasive particles into the sliding surfaces.
 

DOI

10.21608/jest.2013.80429

Keywords

Wear particles, oil lubrication, engines, temper colours, wear severity

Authors

First Name

M. G.

Last Name

El-Sherbiny

MiddleName

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Affiliation

Faculty of Engineering, Cairo University, P. N. 12316, Giza, EGYPT.

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City

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Orcid

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First Name

W. Y.

Last Name

Ali

MiddleName

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Affiliation

Faculty of Engineering, Taif University, Al –Taif, Saudi Arabia

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Volume

10

Article Issue

3

Related Issue

12067

Issue Date

2013-07-01

Receive Date

2013-04-08

Publish Date

2013-07-01

Page Start

41

Page End

50

Print ISSN

2090-5882

Online ISSN

2090-5955

Article File

JEST_Volume 10_Issue 3_Pages 41-50.pdf

PDF . 845.4kB

Link

https://jest.journals.ekb.eg/article_80429.html

Detail API

https://jest.journals.ekb.eg/service?article_code=80429

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4

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Original Article

Type Code

1,211

Publication Type

Journal

Publication Title

Journal of the Egyptian Society of Tribology

Publication Link

https://jest.journals.ekb.eg/

MainTitle

TEMPER COLOURS OF WEAR PARTICLES

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Article

Created At

22 Jan 2023