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dc.contributor.authorRogne, Bjørn Rune
dc.contributor.authorKheradmand, Nousha
dc.contributor.authorDeng, Yun
dc.contributor.authorBarnoush, Afrooz
dc.date.accessioned2019-07-09T06:24:59Z
dc.date.available2019-07-09T06:24:59Z
dc.date.created2017-09-27T13:18:29Z
dc.date.issued2018
dc.identifier.citationActa Materialia. 2018, 144 257-268.nb_NO
dc.identifier.issn1359-6454
dc.identifier.urihttp://hdl.handle.net/11250/2603795
dc.description.abstractThe susceptibility of Fe–26Al–0.5Cr (at.%) intermetallic alloy to hydrogen assisted cracking was evaluated by micromechanical fracture mechanics specimens. The notched micro-beams were loaded in situ in an environmental scanning electron microscope under two conditions: one with low pressure to avoid any hydrogen effect and the other with water vapour to promote hydrogen uptake and hydrogen assisted cracking. Fractographic and electron backscatter diffraction analysis carried out on the fracture surfaces of the ruptured beams revealed the mechanisms of the crack propagation. Under both conditions, the failure was cleavage-like, accommodated with plastic deformation. The results show the influence of hydrogen-induced embrittlement on the initiation of the fracture and the plasticity of the crack tip during the propagation of the crack, where the latter becomes localised and uniform over the fracture surface. From the observations, a three stage crack propagation process is proposed. Also, the fracture toughness of the samples was evaluated by linear elastic fracture mechanics and the validity of the results are discussed.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.titleIn situ micromechanical testing in environmental scanning electron microscope: A new insight into hydrogen-assisted crackingnb_NO
dc.title.alternativeIn situ micromechanical testing in environmental scanning electron microscope: A new insight into hydrogen-assisted crackingnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber257-268nb_NO
dc.source.volume144nb_NO
dc.source.journalActa Materialianb_NO
dc.identifier.doi10.1016/j.actamat.2017.10.037
dc.identifier.cristin1498911
dc.relation.projectNorges forskningsråd: 244068nb_NO
dc.relation.projectNorges forskningsråd: 234130nb_NO
dc.relation.projectNorges forskningsråd: 245963nb_NO
dc.description.localcodeThis article will not be available due to copyright restrictions (c) 2018 by Elseviernb_NO
cristin.unitcode194,64,92,0
cristin.unitnameInstitutt for maskinteknikk og produksjon
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode2


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