Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/10472
Title: Finite element analysis of thermal cycle in laser cladding for railway repair
Authors: Lai, Q
Abrahams, R
Yan, W
Mutton, PJ
Qiu, C
Paradowska, AM
Soodi, M
Roy, T
Keywords: Cladding
Lasers
Railways
Microstructure
Vickers hardness
Martensite
Tribology
Heat treatments
Fatigue
Issue Date: 1-Jan-2017
Publisher: Engineers Australia
Citation: 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 9th Australasian Congress on Applied Mechanics 2017 (ACAM 9) . Paper presented at Proceedings of the 9th Australasian Congress on Applied Mechanics (ACAM9), Sydney, Engineers Australia, 27-29 November 2017.
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 mircostructures 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.
URI: https://apo.ansto.gov.au/dspace/handle/10238/10472
ISBN: 9781925627022
Appears in Collections:Conference Publications

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