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Two and three-dimensional characterisation of localised corrosion affected by lack-of-fusion pores in 316L stainless steel produced by selective laser melting
journal contribution
posted on 2020-04-01, 00:00 authored by Majid Laleh, A E Hughes, S Yang, J Li, Wei XuWei Xu, Ian GibsonIan Gibson, Mike Yongjun TanMike Yongjun Tan© 2019 Elsevier Ltd Localised corrosion of 316 L stainless steel (316 L SS) produced by selective laser melting (SLM) was investigated by two and three-dimensional techniques. It was revealed that porosity, which inevitably exists in the SLM-produced parts, is a critical factor determining the susceptibility to localised corrosion. Specimens containing lack-of-fusion (LOF) pores were found to be extremely susceptible to localised corrosion, as indicated by their lower breakdown potentials measured in polarisation tests. Computed tomography (CT) analysis, capable of linking the microstructure and corrosion propagation paths in three dimensions, showed the development of localised corrosion at the sites of LOF pores upon exposure to ferric chloride solution.
History
Journal
Corrosion ScienceVolume
165Issue
1Article number
108394Pagination
1 - 12Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0010-938XPublication classification
C Journal article; C1 Refereed article in a scholarly journalUsage metrics
Keywords
selective laster meltingstainless steellocalised corrosionporositycomputed tomographydata constrained modellingScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials ScienceSelective laser meltingPITTING CORROSIONFORMATION MECHANISMSBEHAVIORRESISTANCEMICROSTRUCTUREINITIATIONINCLUSIONSMETALLURGY304LMechanical Engineering
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