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Tribological Properties of Laser Cladded Alloys for Repair of Rail Components

Tram or light rail systems are heavily relied upon for passenger transit; however, low-carbon steel grades commonly used in special trackwork, such as in switches, are prone to wear, rolling contact fatigue (RCF), and deformation under cyclic wheel–rail contact. To address this, laser cladding can b...

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Autores principales: Fasihi, Panahsadat, Kendall, Olivia, Abrahams, Ralph, Mutton, Peter, Qiu, Cong, Schläfer, Thomas, Yan, Wenyi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9657680/
https://www.ncbi.nlm.nih.gov/pubmed/36363057
http://dx.doi.org/10.3390/ma15217466
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author Fasihi, Panahsadat
Kendall, Olivia
Abrahams, Ralph
Mutton, Peter
Qiu, Cong
Schläfer, Thomas
Yan, Wenyi
author_facet Fasihi, Panahsadat
Kendall, Olivia
Abrahams, Ralph
Mutton, Peter
Qiu, Cong
Schläfer, Thomas
Yan, Wenyi
author_sort Fasihi, Panahsadat
collection PubMed
description Tram or light rail systems are heavily relied upon for passenger transit; however, low-carbon steel grades commonly used in special trackwork, such as in switches, are prone to wear, rolling contact fatigue (RCF), and deformation under cyclic wheel–rail contact. To address this, laser cladding can be used to apply a metal coating to protect the underlying substrate and rebuild the worn rail profiles. Laser cladding may also be applied to remove cracking by rebuilding the rail head. The tribological characteristics of light rail components after laser cladding with Stellite 6 and a newly developed martensitic stainless steel were investigated, using roller-on-disc wear testing. Analysis of the microstructure, mechanical properties, and wear performance was undertaken to develop a comprehensive understanding of the influence of the laser cladding type on the wear and surface fatigue performance. Both cladding alloys significantly improved the tribological performance. These findings were compared to those for a laser cladded hypereutectoid rail type (reported in our previous study). It was found that laser cladding with a suitable alloy was an effective technique for improving the tribological properties, increasing the wear resistance, and increasing the retardation of cracking on both substrates. These findings suggest laser cladding may be used to repair light rail components, and this technique can be optimized to suit different rail grades. This makes laser cladding a flexible and versatile maintenance strategy, in both coating and repair applications, to prolong the operational lifetime of critical components for the railway industry.
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spelling pubmed-96576802022-11-15 Tribological Properties of Laser Cladded Alloys for Repair of Rail Components Fasihi, Panahsadat Kendall, Olivia Abrahams, Ralph Mutton, Peter Qiu, Cong Schläfer, Thomas Yan, Wenyi Materials (Basel) Article Tram or light rail systems are heavily relied upon for passenger transit; however, low-carbon steel grades commonly used in special trackwork, such as in switches, are prone to wear, rolling contact fatigue (RCF), and deformation under cyclic wheel–rail contact. To address this, laser cladding can be used to apply a metal coating to protect the underlying substrate and rebuild the worn rail profiles. Laser cladding may also be applied to remove cracking by rebuilding the rail head. The tribological characteristics of light rail components after laser cladding with Stellite 6 and a newly developed martensitic stainless steel were investigated, using roller-on-disc wear testing. Analysis of the microstructure, mechanical properties, and wear performance was undertaken to develop a comprehensive understanding of the influence of the laser cladding type on the wear and surface fatigue performance. Both cladding alloys significantly improved the tribological performance. These findings were compared to those for a laser cladded hypereutectoid rail type (reported in our previous study). It was found that laser cladding with a suitable alloy was an effective technique for improving the tribological properties, increasing the wear resistance, and increasing the retardation of cracking on both substrates. These findings suggest laser cladding may be used to repair light rail components, and this technique can be optimized to suit different rail grades. This makes laser cladding a flexible and versatile maintenance strategy, in both coating and repair applications, to prolong the operational lifetime of critical components for the railway industry. MDPI 2022-10-25 /pmc/articles/PMC9657680/ /pubmed/36363057 http://dx.doi.org/10.3390/ma15217466 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Fasihi, Panahsadat
Kendall, Olivia
Abrahams, Ralph
Mutton, Peter
Qiu, Cong
Schläfer, Thomas
Yan, Wenyi
Tribological Properties of Laser Cladded Alloys for Repair of Rail Components
title Tribological Properties of Laser Cladded Alloys for Repair of Rail Components
title_full Tribological Properties of Laser Cladded Alloys for Repair of Rail Components
title_fullStr Tribological Properties of Laser Cladded Alloys for Repair of Rail Components
title_full_unstemmed Tribological Properties of Laser Cladded Alloys for Repair of Rail Components
title_short Tribological Properties of Laser Cladded Alloys for Repair of Rail Components
title_sort tribological properties of laser cladded alloys for repair of rail components
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9657680/
https://www.ncbi.nlm.nih.gov/pubmed/36363057
http://dx.doi.org/10.3390/ma15217466
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