Effect of lubricant degradation on the tribological performance of a wheel-rail system

Abstrac: In this work lubricant degradation and its relationship with tribological behavior was studied. Commercial grease (Sintono Terra HLK) and three versions of a newly developed product (Tribolub) for the Metro system of Medellín city were studied. A twin-disc testing machine was used to evalua...

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Autores:
Pérez de Brito, Andrey Fabio
Tipo de recurso:
Fecha de publicación:
2014
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/52626
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/52626
http://bdigital.unal.edu.co/46987/
Palabra clave:
62 Ingeniería y operaciones afines / Engineering
Tribologia
Lubricación
Sistema rueda-carril
Desgaste de superficies
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
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network_name_str Universidad Nacional de Colombia
repository_id_str
spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Toro Betancur, Alejandro (Thesis advisor)b1a305cd-5615-4ab3-8983-b244840c3d8d-1Pérez de Brito, Andrey Fabio3ed1be15-358a-49f2-9ca0-4808456b4fdd3002019-06-29T14:56:05Z2019-06-29T14:56:05Z2014-09-08https://repositorio.unal.edu.co/handle/unal/52626http://bdigital.unal.edu.co/46987/Abstrac: In this work lubricant degradation and its relationship with tribological behavior was studied. Commercial grease (Sintono Terra HLK) and three versions of a newly developed product (Tribolub) for the Metro system of Medellín city were studied. A twin-disc testing machine was used to evaluate the effect of degradation caused by either radiation or mechanical action on the tribological properties of the greases; also, a number of tests were carried out to learn about the changes in rheological properties of the greases. The results showed that tribological testing of degraded greases using a twin-disc machine and a subsequent viscometric analysis can be considered as a viable option to study performance of degraded greases used for wheel-rail systems. All the greases studied showed a decrease in their tribological performance after mechanical degradation in twin-disc testing machine, being the degraded Tribolub-3 the one that allowed obtaining lower values of friction coefficient and mass loss of the samples. Both mechanical and radiation-induced degradation led to a significant increase in the viscosity of the greases studied, especially for low shear rates. FTIR analyses showed that such response was mainly caused by chemical changes in the structure of the greases. Viscosity-time curves showed a rheopectic behavior at low shear rates for Sintono Terra HLK and one of the versions of Tribolub, which was related to the particle contents and the effect of thickeners. Wetting tests showed better wettability for Tribolub than for Sintono Terra HLK, both before and after degradationMaestríaapplication/pdfspaUniversidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Ingeniería de MaterialesEscuela de Ingeniería de MaterialesPérez de Brito, Andrey Fabio (2014) Effect of lubricant degradation on the tribological performance of a wheel-rail system. Maestría thesis, Universidad Nacional de Colombia - Sede Medellín.62 Ingeniería y operaciones afines / EngineeringTribologiaLubricaciónSistema rueda-carrilDesgaste de superficiesEffect of lubricant degradation on the tribological performance of a wheel-rail systemTrabajo de grado - Maestríainfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionTexthttp://purl.org/redcol/resource_type/TMORIGINAL412312.2015.pdfTesis de Maestría en Ingeniería – Materiales y Procesosapplication/pdf9677920https://repositorio.unal.edu.co/bitstream/unal/52626/1/412312.2015.pdf2f90203b6ed352c74e3d1f3d67a829c6MD51THUMBNAIL412312.2015.pdf.jpg412312.2015.pdf.jpgGenerated Thumbnailimage/jpeg3889https://repositorio.unal.edu.co/bitstream/unal/52626/2/412312.2015.pdf.jpga82359e6181a79f7141d3e258ed3031cMD52unal/52626oai:repositorio.unal.edu.co:unal/526262024-03-03 23:07:47.22Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co
dc.title.spa.fl_str_mv Effect of lubricant degradation on the tribological performance of a wheel-rail system
title Effect of lubricant degradation on the tribological performance of a wheel-rail system
spellingShingle Effect of lubricant degradation on the tribological performance of a wheel-rail system
62 Ingeniería y operaciones afines / Engineering
Tribologia
Lubricación
Sistema rueda-carril
Desgaste de superficies
title_short Effect of lubricant degradation on the tribological performance of a wheel-rail system
title_full Effect of lubricant degradation on the tribological performance of a wheel-rail system
title_fullStr Effect of lubricant degradation on the tribological performance of a wheel-rail system
title_full_unstemmed Effect of lubricant degradation on the tribological performance of a wheel-rail system
title_sort Effect of lubricant degradation on the tribological performance of a wheel-rail system
dc.creator.fl_str_mv Pérez de Brito, Andrey Fabio
dc.contributor.advisor.spa.fl_str_mv Toro Betancur, Alejandro (Thesis advisor)
dc.contributor.author.spa.fl_str_mv Pérez de Brito, Andrey Fabio
dc.subject.ddc.spa.fl_str_mv 62 Ingeniería y operaciones afines / Engineering
topic 62 Ingeniería y operaciones afines / Engineering
Tribologia
Lubricación
Sistema rueda-carril
Desgaste de superficies
dc.subject.proposal.spa.fl_str_mv Tribologia
Lubricación
Sistema rueda-carril
Desgaste de superficies
description Abstrac: In this work lubricant degradation and its relationship with tribological behavior was studied. Commercial grease (Sintono Terra HLK) and three versions of a newly developed product (Tribolub) for the Metro system of Medellín city were studied. A twin-disc testing machine was used to evaluate the effect of degradation caused by either radiation or mechanical action on the tribological properties of the greases; also, a number of tests were carried out to learn about the changes in rheological properties of the greases. The results showed that tribological testing of degraded greases using a twin-disc machine and a subsequent viscometric analysis can be considered as a viable option to study performance of degraded greases used for wheel-rail systems. All the greases studied showed a decrease in their tribological performance after mechanical degradation in twin-disc testing machine, being the degraded Tribolub-3 the one that allowed obtaining lower values of friction coefficient and mass loss of the samples. Both mechanical and radiation-induced degradation led to a significant increase in the viscosity of the greases studied, especially for low shear rates. FTIR analyses showed that such response was mainly caused by chemical changes in the structure of the greases. Viscosity-time curves showed a rheopectic behavior at low shear rates for Sintono Terra HLK and one of the versions of Tribolub, which was related to the particle contents and the effect of thickeners. Wetting tests showed better wettability for Tribolub than for Sintono Terra HLK, both before and after degradation
publishDate 2014
dc.date.issued.spa.fl_str_mv 2014-09-08
dc.date.accessioned.spa.fl_str_mv 2019-06-29T14:56:05Z
dc.date.available.spa.fl_str_mv 2019-06-29T14:56:05Z
dc.type.spa.fl_str_mv Trabajo de grado - Maestría
dc.type.driver.spa.fl_str_mv info:eu-repo/semantics/masterThesis
dc.type.version.spa.fl_str_mv info:eu-repo/semantics/acceptedVersion
dc.type.content.spa.fl_str_mv Text
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status_str acceptedVersion
dc.identifier.uri.none.fl_str_mv https://repositorio.unal.edu.co/handle/unal/52626
dc.identifier.eprints.spa.fl_str_mv http://bdigital.unal.edu.co/46987/
url https://repositorio.unal.edu.co/handle/unal/52626
http://bdigital.unal.edu.co/46987/
dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Ingeniería de Materiales
Escuela de Ingeniería de Materiales
dc.relation.references.spa.fl_str_mv Pérez de Brito, Andrey Fabio (2014) Effect of lubricant degradation on the tribological performance of a wheel-rail system. Maestría thesis, Universidad Nacional de Colombia - Sede Medellín.
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
dc.rights.uri.spa.fl_str_mv http://creativecommons.org/licenses/by-nc/4.0/
dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.mimetype.spa.fl_str_mv application/pdf
institution Universidad Nacional de Colombia
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repository.name.fl_str_mv Repositorio Institucional Universidad Nacional de Colombia
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