Effects of preheating and carbon dilution on material characteristics of laser-cladded hypereutectoid rail steels

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dc.contributor.authorLai, Qen_AU
dc.contributor.authorAbrahams, Ren_AU
dc.contributor.authorYan, Wen_AU
dc.contributor.authorQiu, Cen_AU
dc.contributor.authorMutton, PJen_AU
dc.contributor.authorParadowska, AMen_AU
dc.contributor.authorFang, Xen_AU
dc.contributor.authorSoodi, Men_AU
dc.contributor.authorWu, Xen_AU
dc.date.accessioned2021-02-11T01:56:13Zen_AU
dc.date.available2021-02-11T01:56:13Zen_AU
dc.date.issued2018-01-17en_AU
dc.date.statistics2021-02-08en_AU
dc.description.abstractThe impacts of preheating conditions and carbon dilution on the microstructural and mechanical properties of laser cladded rails using single and double cladding layers have been investigated for a hypereutectoid steel grades typically used under heavy haul conditions. The microstructures in the HAZ showed that formation of martensite, which has a detrimental effect on behaviour in wheel-rail contact, was successfully inhibited by increasing the length of the preheated region using a preheating temperature of 350 °C. Dilution of carbon from the hypereutectoid substrate was observed and its effect on the microstructures of the 410L ferritic stainless-steel deposits was investigated. The formation of ferrite in the 410L cladding layers was attributed to the very low carbon content, and no carbide formation was observed on boundaries of the ferritic grains. The thickness of dilution band was determined to be approximately equal to the thickness of the first cladding layer. Texture measurement obtained by EBSD showed a random trend owing to the formation of martensite in diluted bands. Strong solidification fibre texture was developed for double deposition, particularly in the second deposit. Mechanical characterization of the 410L deposits undertaken in terms of Vickers microhardness, shear and tensile yield strengths, and ultimate tensile and shear strengths were correlated with the observed microstructural morphologies. © 2017 Elsevier B.V.en_AU
dc.identifier.citationLai, Q., Abrahams, R., Yan, W., Qiu, C., Mutton, P., Paradowska, A., Fang, X., Soodi, M., & Wu, X. (2018). Effects of preheating and carbon dilution on material characteristics of laser-cladded hypereutectoid rail steels. Materials Science and Engineering: A, 712, 548-563. doi:10.1016/j.msea.2017.12.003en_AU
dc.identifier.issn0921-5093en_AU
dc.identifier.journaltitleMaterials Science and Engineering: Aen_AU
dc.identifier.pagination548-563en_AU
dc.identifier.urihttps://doi.org/10.1016/j.msea.2017.12.003en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10368en_AU
dc.identifier.volume712en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCladdingen_AU
dc.subjectLasersen_AU
dc.subjectSteelsen_AU
dc.subjectMechanical propertiesen_AU
dc.subjectMicrostructureen_AU
dc.subjectHeat treatmentsen_AU
dc.subjectCarbonen_AU
dc.subjectMartensiteen_AU
dc.subjectFerriteen_AU
dc.subjectMicrohardnessen_AU
dc.titleEffects of preheating and carbon dilution on material characteristics of laser-cladded hypereutectoid rail steelsen_AU
dc.typeJournal Articleen_AU
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