Finite element analysis of thermal cycle in laser cladding for railway repair

Q. Lai, R. Abrahams, W. Yan, P. Mutton, C. Qiu, A. Paradowska, M. Soodi, T. Roy

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

Material degradation in the forms of wear and rolling contact fatigue is one of main hindrances in the development of today’s expeditious heavy-haul railway systems. Laser cladding is proposed as a promising repair technique for damaged rail tracks so as to mitigate the material degradation rates and prolong the component service life. This paper reports the influence of laser cladding directions on thermal cycle and the corresponding microstructures and service performance of laser cladded premium hypereutectoid rails. For two separate cladding directions, thermal information of pre-, during and post-laser treatment on three dimensional 68 kg rail models was simulated via ANSYS platform. Furthermore, microstructural characteristics of the actual rails under the analogous processing conditions were assessed via optical microscopy. Potential mechanical and tribological properties were characterized by Vickers indentation. The unified correlations between the measured properties and observed microstructural features were acquired. The reasons for the formation of martensite renowned for great cracking tendency at certain regions in HAZ were unveiled, thus future prevention of forming martensite can be achieved.

Original languageEnglish
Title of host publication9th Australasian Congress on Applied Mechanics (ACAM 2017)
EditorsGangadhara Prusty, Anna Paradowska
Place of PublicationSydney Australia
PublisherEngineers Australia
Number of pages8
ISBN (Electronic)9781925627022
Publication statusPublished - 1 Jan 2017
EventAustralasian Congress on Applied Mechanics 2017 - University of New South Wales, Sydney, Australia
Duration: 27 Nov 201729 Nov 2017
Conference number: 9th
https://acam9.com.au/

Conference

ConferenceAustralasian Congress on Applied Mechanics 2017
Abbreviated titleACAM 2017
CountryAustralia
CitySydney
Period27/11/1729/11/17
Internet address

Keywords

  • Finite element method
  • Hypereutectoid rail grade
  • Laser cladding
  • Microstructure
  • Thermal field

Cite this

Lai, Q., Abrahams, R., Yan, W., Mutton, P., Qiu, C., Paradowska, A., ... Roy, T. (2017). Finite element analysis of thermal cycle in laser cladding for railway repair. In G. Prusty, & A. Paradowska (Eds.), 9th Australasian Congress on Applied Mechanics (ACAM 2017) Sydney Australia: Engineers Australia.
Lai, Q. ; Abrahams, R. ; Yan, W. ; Mutton, P. ; Qiu, C. ; Paradowska, A. ; Soodi, M. ; Roy, T. / Finite element analysis of thermal cycle in laser cladding for railway repair. 9th Australasian Congress on Applied Mechanics (ACAM 2017). editor / Gangadhara Prusty ; Anna Paradowska. Sydney Australia : Engineers Australia, 2017.
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abstract = "Material degradation in the forms of wear and rolling contact fatigue is one of main hindrances in the development of today’s expeditious heavy-haul railway systems. Laser cladding is proposed as a promising repair technique for damaged rail tracks so as to mitigate the material degradation rates and prolong the component service life. This paper reports the influence of laser cladding directions on thermal cycle and the corresponding microstructures and service performance of laser cladded premium hypereutectoid rails. For two separate cladding directions, thermal information of pre-, during and post-laser treatment on three dimensional 68 kg rail models was simulated via ANSYS platform. Furthermore, microstructural characteristics of the actual rails under the analogous processing conditions were assessed via optical microscopy. Potential mechanical and tribological properties were characterized by Vickers indentation. The unified correlations between the measured properties and observed microstructural features were acquired. The reasons for the formation of martensite renowned for great cracking tendency at certain regions in HAZ were unveiled, thus future prevention of forming martensite can be achieved.",
keywords = "Finite element method, Hypereutectoid rail grade, Laser cladding, Microstructure, Thermal field",
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Lai, Q, Abrahams, R, Yan, W, Mutton, P, Qiu, C, Paradowska, A, Soodi, M & Roy, T 2017, Finite element analysis of thermal cycle in laser cladding for railway repair. in G Prusty & A Paradowska (eds), 9th Australasian Congress on Applied Mechanics (ACAM 2017). Engineers Australia, Sydney Australia, Australasian Congress on Applied Mechanics 2017, Sydney, Australia, 27/11/17.

Finite element analysis of thermal cycle in laser cladding for railway repair. / Lai, Q.; Abrahams, R.; Yan, W.; Mutton, P.; Qiu, C.; Paradowska, A.; Soodi, M.; Roy, T.

9th Australasian Congress on Applied Mechanics (ACAM 2017). ed. / Gangadhara Prusty; Anna Paradowska. Sydney Australia : Engineers Australia, 2017.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

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AU - Roy, T.

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N2 - Material degradation in the forms of wear and rolling contact fatigue is one of main hindrances in the development of today’s expeditious heavy-haul railway systems. Laser cladding is proposed as a promising repair technique for damaged rail tracks so as to mitigate the material degradation rates and prolong the component service life. This paper reports the influence of laser cladding directions on thermal cycle and the corresponding microstructures and service performance of laser cladded premium hypereutectoid rails. For two separate cladding directions, thermal information of pre-, during and post-laser treatment on three dimensional 68 kg rail models was simulated via ANSYS platform. Furthermore, microstructural characteristics of the actual rails under the analogous processing conditions were assessed via optical microscopy. Potential mechanical and tribological properties were characterized by Vickers indentation. The unified correlations between the measured properties and observed microstructural features were acquired. The reasons for the formation of martensite renowned for great cracking tendency at certain regions in HAZ were unveiled, thus future prevention of forming martensite can be achieved.

AB - Material degradation in the forms of wear and rolling contact fatigue is one of main hindrances in the development of today’s expeditious heavy-haul railway systems. Laser cladding is proposed as a promising repair technique for damaged rail tracks so as to mitigate the material degradation rates and prolong the component service life. This paper reports the influence of laser cladding directions on thermal cycle and the corresponding microstructures and service performance of laser cladded premium hypereutectoid rails. For two separate cladding directions, thermal information of pre-, during and post-laser treatment on three dimensional 68 kg rail models was simulated via ANSYS platform. Furthermore, microstructural characteristics of the actual rails under the analogous processing conditions were assessed via optical microscopy. Potential mechanical and tribological properties were characterized by Vickers indentation. The unified correlations between the measured properties and observed microstructural features were acquired. The reasons for the formation of martensite renowned for great cracking tendency at certain regions in HAZ were unveiled, thus future prevention of forming martensite can be achieved.

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Lai Q, Abrahams R, Yan W, Mutton P, Qiu C, Paradowska A et al. Finite element analysis of thermal cycle in laser cladding for railway repair. In Prusty G, Paradowska A, editors, 9th Australasian Congress on Applied Mechanics (ACAM 2017). Sydney Australia: Engineers Australia. 2017