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dc.contributor.authorZhou, Weien
dc.contributor.authorZhou, Yuen
dc.contributor.authorWu, Naienen
dc.contributor.authorMaharjan, Nirojen
dc.identifier.citationMaharjan, N., Zhou, W., Zhou, Y., & Wu, N. (2019). Laser surface hardening of AISI 1055 steel in water submerged condition. Surface Review and Letters, 1950087-94. doi:10.1142/S0218625X19500872en
dc.description.abstractUnderwater laser hardening might produce better surface mechanical properties than conventional laser hardening in air due to additional cooling effect by water. However, it has not been studied in detail. This study investigates the effect of water layer on laser surface hardening of AISI 1055 steel. It is found that laser surface hardening is feasible with water layer up to 3 mm above the steel surface. A higher surface hardness is achieved during underwater processing. This is attributed to fast cooling by water which facilitates complete martensitic transformation. Nevertheless, the hardened area is smaller than that in conventional laser hardening in air due to attenuation of laser energy. Above 3 mm, the laser beam is severely attenuated due to formation of vapor plume. Furthermore, it is found that surface oxidation cannot be prevented completely even during underwater treatment, and the water movement results in random distribution of metal slag on the surface.en
dc.description.sponsorshipASTAR (Agency for Sci., Tech. and Research, S’pore)en
dc.format.extent12 p.en
dc.relation.ispartofseriesSurface Review and Lettersen
dc.rightsElectronic version of an article published as Surface Review and Letters, 2019, 1950087-94. @ copyright World Scientific Publishing Company
dc.subjectLaser Surface Hardeningen
dc.subjectDRNTU::Engineering::Mechanical engineeringen
dc.titleLaser surface hardening of AISI 1055 steel in water submerged conditionen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen
dc.contributor.organizationAdvanced Remanufacturing and Technology Centreen
dc.description.versionAccepted versionen
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