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...
- 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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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 |
dc.type.redcol.spa.fl_str_mv |
http://purl.org/redcol/resource_type/TM |
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 |
bitstream.url.fl_str_mv |
https://repositorio.unal.edu.co/bitstream/unal/52626/1/412312.2015.pdf https://repositorio.unal.edu.co/bitstream/unal/52626/2/412312.2015.pdf.jpg |
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bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositorio Institucional Universidad Nacional de Colombia |
repository.mail.fl_str_mv |
repositorio_nal@unal.edu.co |
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1814090153810984960 |