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On the unusual intergranular corrosion resistance of 316L stainless steel additively manufactured by selective laser melting
journal contribution
posted on 2019-12-01, 00:00 authored by Majid Laleh, A E Hughes, Wei XuWei Xu, N Haghdadi, K Wang, Pavel CizekPavel Cizek, Ian GibsonIan Gibson, Mike Yongjun TanMike Yongjun TanThe intergranular corrosion (IGC) resistance of 316L stainless steel (316L SS) produced by selective laser melting (SLM) was investigated using microscopy analysis and electrochemical measurements. The IGC resistance of SLM-produced 316L SS, determined using a double-loop electrochemical potentiokinetic reactivation test, was found to be substantially higher than that of conventional 316L SS. This unusual behaviour was explained by the fact that no Cr-rich precipitates were detected for SLM-produced specimens after long-term sensitisation heat-treatment and those SLM-produced specimens exhibited a high frequency of twin boundaries and low-angle grain boundaries along with fine grains, leading to the avoidance of localised Cr depletion.
History
Journal
Corrosion scienceVolume
161Article number
108189Pagination
1 - 7Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0010-938XLanguage
engPublication classification
C1 Refereed article in a scholarly journalUsage metrics
Keywords
Intergranular corrosion316L stainless steelAdditive manufacturingGrain boundaryPrecipitationScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials ScienceGRAIN-BOUNDARY-CHARACTERSIGMA-PHASE PRECIPITATIONCARBIDE PRECIPITATIONLAVES PHASEMICROSTRUCTURESENSITIZATIONBEHAVIORCRYSTALLOGRAPHYSUSCEPTIBILITYTRANSFORMATIONMechanical Engineering
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