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Laser welding of precipitation strengthened Ni-rich NiTiHf high temperature shape memory alloys: Microstructure and mechanical properties

2019-01-15Artigo científico Acesso aberto
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dc.contributor.authorOliveira, J. P.
dc.contributor.authorSchell, N.
dc.contributor.authorZhou, N.
dc.contributor.authorWood, L.
dc.contributor.authorBenafan, O.
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
dc.date.accessioned2019-09-18T22:34:16Z
dc.date.available2019-09-18T22:34:16Z
dc.date.issued2019-01-15
dc.descriptionDESY via beamtime proposal I-20160912. NASA Aeronautics Research Mission Directorate (ARMD) Transformational Tools & Technologies (TTT). Sem PDF conforme despacho.
dc.description.abstractHigh temperature shape memory alloys are currently attracting significant attention by the aerospace industry due to the potential use of shape memory and superelastic properties at temperatures above 100 °C. Virtually any advanced engineering material must, at some point, be joined either to itself, to create complex shaped structures, or to other materials to increase its potential applications. In this work, laser welding of a precipitation strengthened Ni-rich NiTiHf high temperature shape memory alloy is reported for the first time. Starting with a base material aged at 500 °C for 3 h and air cooled, defect-free joints with a conduction weld mode were obtained. Microstructural characterization, facilitated via microscopy and synchrotron X-ray diffraction, revealed that the fusion zone contained a single-phase martensitic structure at room temperature, compared to a mixture of martensite and H-phase precipitates in the base material. Isothermal loading in both the martensite (at 30 °C) and austenite (at 200 °C) phases revealed equivalent strength and near-perfect superelasticity in the welded and un-welded reference material.en
dc.description.versionpublished
dc.format.extent6
dc.format.extent1978698
dc.identifier.doi10.1016/j.matdes.2018.11.053
dc.identifier.issn0264-1275
dc.identifier.otherPURE: 11475262
dc.identifier.otherPURE UUID: 6466777b-5c76-4895-878d-09400bb1429e
dc.identifier.otherScopus: 85057529968
dc.identifier.otherWOS: 000454128400022
dc.identifier.otherORCID: /0000-0001-6906-1870/work/63724170
dc.identifier.urihttp://www.scopus.com/inward/record.url?scp=85057529968&partnerID=8YFLogxK
dc.identifier.urlhttps://www.scopus.com/pages/publications/85057529968
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/5876/136059/PT
dc.subjectHigh temperature shape memory alloys
dc.subjectLaser welding
dc.subjectMartensitic phase transformation
dc.subjectNiTiHf
dc.subjectSuperelasticity
dc.subjectSynchrotron radiation
dc.subjectGeneral Materials Science
dc.subjectMechanics of Materials
dc.subjectMechanical Engineering
dc.titleLaser welding of precipitation strengthened Ni-rich NiTiHf high temperature shape memory alloys: Microstructure and mechanical propertiesen
dc.typejournal article
degois.publication.firstPage229
degois.publication.lastPage234
degois.publication.titleMaterials & Design
degois.publication.volume162
dspace.entity.typePublication
oaire.awardNumberPEst-OE/EME/UI0667/2014
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/PEst-OE%2FEME%2FUI0667%2F2014/PT
oaire.fundingStream5876
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
relation.isProjectOfPublication2a8dae1f-0ff6-49f8-9530-a46e508b4b47
relation.isProjectOfPublication.latestForDiscovery2a8dae1f-0ff6-49f8-9530-a46e508b4b47

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