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Controlling intermetallic compounds formation during laser welding of NiTi to 316L stainless steel

2020-01Artigo científico Acesso aberto
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dc.contributor.authorShamsolhodaei, A.
dc.contributor.authorOliveira, J. P.
dc.contributor.authorSchell, N.
dc.contributor.authorMaawad, E.
dc.contributor.authorPanton, B.
dc.contributor.authorZhou, Y. N.
dc.contributor.institutionDEMI - Departamento de Engenharia Mecânica e Industrial
dc.contributor.institutionUNIDEMI - Unidade de Investigação e Desenvolvimento em Engenharia Mecânica e Industrial
dc.contributor.pblElsevier Science B.V., Amsterdam.
dc.date.accessioned2020-06-25T00:13:19Z
dc.date.available2020-06-25T00:13:19Z
dc.date.issued2020-01
dc.descriptionThe authors would like to acknowledge the support of NSERC is Natural Science and Engineering Reseach Council in Canada, Canada Research Chairs (CRC). Fundacao para a Ciencia e a Tecnologia (FCT -MCTES) for its financial support via the project UID/EMS/00667/2019 (UNIDEMI). Parts of this research were carried out at PETRA III at DESY, a member of the Helmholtz Association.
dc.description.abstractDissimilar laser welding of NiTi to stainless steel is of great importance in designing medical devices but the formation of hard and brittle intermetallic compound results in low strength joints. Normally, different interlayers are applied as physical and chemical barriers to control the microstructure and to improve the mechanical properties. However, this procedure is a cost and time consuming process and may cause the formation of other types of intermetallics depending on the interlayer used. In the present work, laser offsetting welding (LOW) was introduced without inserting any interlayer by shifting the laser beam 100 μm into the stainless steel from the NiTi/316L stainless steel interface. This led to a softer weld zone (~570 H V), due to the formation of less brittle intermetallics compounds (Fe2Ti, Cr2Ti and Ni3Ti) compared to that (~970 H V) when the laser beam was placed at the NiTi/316L stainless steel interface. For comparison purposes, an Ni interlayer was also used to control the chemical composition of the fusion zone. In terms of mechanical properties, both the laser offset welding and the use of an Ni interlayer, were seen to improve the tensile strength of the dissimilar joints (above 400 MPa) compared to the centerline welding condition (around 200 MPa). Hence, LOW was confirmed to be an effective method to laser weld the NiTi/Stainless Steels.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent2788860
dc.identifier.doi10.1016/j.intermet.2019.106656
dc.identifier.issn0966-9795
dc.identifier.otherPURE: 18745783
dc.identifier.otherPURE UUID: e1d0a888-6b3d-4aea-81a6-c028eb320a51
dc.identifier.otherScopus: 85074979070
dc.identifier.otherWOS: 000506721400015
dc.identifier.otherORCID: /0000-0001-6906-1870/work/76193694
dc.identifier.urihttp://hdl.handle.net/10362/99913
dc.identifier.urlhttps://www.scopus.com/pages/publications/85074979070
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/730872/EU
dc.relationConvenient Access to Light Sources Open to Innovation, Science and to the World
dc.subjectDissimilar joining
dc.subjectIntermetallic compounds
dc.subjectLaser welding
dc.subjectNiTi shape memory alloys
dc.subjectStainless steel
dc.subjectSynchrotron X-ray diffraction
dc.subjectGeneral Chemistry
dc.subjectMechanics of Materials
dc.subjectMechanical Engineering
dc.subjectMetals and Alloys
dc.subjectMaterials Chemistry
dc.titleControlling intermetallic compounds formation during laser welding of NiTi to 316L stainless steelen
dc.typejournal article
degois.publication.titleIntermetallics
degois.publication.volume116
dspace.entity.typePublication
oaire.awardNumber730872
oaire.awardTitleConvenient Access to Light Sources Open to Innovation, Science and to the World
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/730872/EU
oaire.fundingStreamH2020
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccess
relation.isProjectOfPublication7c43676e-f87e-4d6f-ba92-a83b48e17c6f
relation.isProjectOfPublication.latestForDiscovery7c43676e-f87e-4d6f-ba92-a83b48e17c6f

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