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dc.contributor.authorNagalingam, Arun Prasanthen_US
dc.contributor.authorLee, Jian-Yuanen_US
dc.contributor.authorYeo, Swee Hocken_US
dc.identifier.citationNagalingam, A. P., Lee, J. & Yeo, S. H. (2021). Multi-jet hydrodynamic surface finishing and X-ray computed tomography (X-CT) inspection of laser powder bed fused Inconel 625 fuel injection/spray nozzles. Journal of Materials Processing Technology, 291, 117018-.
dc.description.abstractLaser powder bed fused (L-PBF) components have poor surface finish quality that hinders their use in practical applications. Surface finishing the complex passages in the L-PBF components is particularly challenging. We aimed to produce a consistent surface finish on the internal passages of direct metal laser sintered (DMLS) Inconel 625 fuel nozzles—regardless of the as-built non-uniform surface—using a multi-jet hydrodynamic finishing technique. We effectively harnessed the hydrodynamic intensity and surface finished the fuel injection/spray tips comprising multiple branches. We found profile and areal surface roughness reduced up to 90 % across all branches. Also, the peak height above the core surface Spk at the nozzle inlet reduced by 40–75 %. X-ray computed tomography (X-CT) inspection post-finishing showed that roundness and circularity of the injection/spray tips improved, while most critical nozzle dimensions were within the tolerance. The results lend further credence that the proposed technique: Multi-jet hydrodynamic cavitation abrasive finishing (MJ-HCAF) can be used to surface-finish and deploy the L-PBF fuel nozzles in practical applications—ensuring safe implementation.en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relation.ispartofJournal of Materials Processing Technologyen_US
dc.rights© 2020 Elsevier B.V. All rights reserved.en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.titleMulti-jet hydrodynamic surface finishing and X-ray computed tomography (X-CT) inspection of laser powder bed fused Inconel 625 fuel injection/spray nozzlesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.contributor.researchRolls-Royce@NTU Corporate Laben_US
dc.subject.keywordsAdditive Manufacturingen_US
dc.subject.keywordsPowder Bed Fusionen_US
dc.description.acknowledgementThis work was performed within the Rolls-Royce@NTU Corporate Lab with support from the National Research Foundation (NRF) of Singapore under the Corp Lab@University Scheme.en_US
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