Corrosion Fatigue Characteristics of 316L Stainless Steel Fabricated by Laser Powder Bed Fusion

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dc.contributor.authorGnanasekaran, Balachanderen
dc.contributor.authorSong, Jieen
dc.contributor.authorVasudevan, Vijayen
dc.contributor.authorFu, Yaoen
dc.contributor.departmentAerospace and Ocean Engineeringen
dc.date.accessioned2021-07-09T18:28:57Zen
dc.date.available2021-07-09T18:28:57Zen
dc.date.issued2021-06-29en
dc.date.updated2021-07-08T14:24:08Zen
dc.description.abstractLaser powder bed fusion (LPBF) has been increasingly used in the fabrication of dense metallic structures. However, the corrosion related properties of LPBF alloys, in particular environment-assisted cracking, such as corrosion fatigue properties, are not well understood. In this study, the corrosion and corrosion fatigue characteristics of LPBF 316L stainless steels (SS) in 3.5 wt.% NaCl solution have been investigated using an electrochemical method, high cycle fatigue, and fatigue crack propagation testing. The LPBF 316L SSs demonstrated significantly improved corrosion properties compared to conventionally manufactured 316L, as reflected by the increased pitting and repassivation potentials, as well as retarded crack initiation. However, the printing parameters did not strongly affect the pitting potentials. LPBF samples also demonstrated enhanced capabilities of repassivation during the fatigue crack propagation. The unique microstructural features introduced during the printing process are discussed. The improved corrosion and corrosion fatigue properties are attributed to the presence of columnar/cellular subgrains formed by dislocation networks that serve as high diffusion paths to transport anti-corrosion elements.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationGnanasekaran, B.; Song, J.; Vasudevan, V.; Fu, Y. Corrosion Fatigue Characteristics of 316L Stainless Steel Fabricated by Laser Powder Bed Fusion. Metals 2021, 11, 1046.en
dc.identifier.doihttps://doi.org/10.3390/met11071046en
dc.identifier.urihttp://hdl.handle.net/10919/104134en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectpitting corrosionen
dc.subjectcorrosion fatigueen
dc.subjectdislocation networken
dc.subjectlaser powder bed fusionen
dc.subject316L stainless steelen
dc.titleCorrosion Fatigue Characteristics of 316L Stainless Steel Fabricated by Laser Powder Bed Fusionen
dc.title.serialMetalsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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