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Article: Kinking in niobium

TitleKinking in niobium
Authors
Issue Date2002
PublisherManey Publishing. The Journal's web site is located at http://www.maney.co.uk/search?fwaction=show&fwid=185
Citation
Materials Science And Technology, 2002, v. 18 n. 4, p. 449-457 How to Cite?
AbstractSingle crystals of niobium with a longitudinal axis near to [111] were strained in tension at 78 K and at the yield point rapid localised plastic deformation occurred accompanied by a large drop in load. Surface examination indicated that kinking had occurred and the crystallographic axes had rotated by ∼25° relative to the matrix crystal. The plane of the 'sharp' kink/matrix interface bisected the angle between the slip traces in the kink and those in the matrix. The kink had the form of a macroscopic shear band. In some cases, but not in all, there was an associated coarse slip band. Macroscopic crystallographic traces of the coarse slip band indicated that the slip system appeared to be (211)[-111] but, in fact, the band comprised intense aggregates of fine slip on {101} planes. A dislocation dynamics model of kinking is presented that accounts for the observed upper yield stress, yield drop, and the observed rotations of the kinked crystal and its interface with the matrix. Finally the effect of adiabatic heating of the kink and its effect on the stability of deformation is considered. © 2002 IoM Communications Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/174054
ISSN
2015 Impact Factor: 1.008
2015 SCImago Journal Rankings: 0.668
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChan, CYen_US
dc.contributor.authorReid, CNen_US
dc.contributor.authorDuggan, BJen_US
dc.date.accessioned2012-11-14T06:20:26Z-
dc.date.available2012-11-14T06:20:26Z-
dc.date.issued2002en_US
dc.identifier.citationMaterials Science And Technology, 2002, v. 18 n. 4, p. 449-457en_US
dc.identifier.issn0267-0836en_US
dc.identifier.urihttp://hdl.handle.net/10722/174054-
dc.description.abstractSingle crystals of niobium with a longitudinal axis near to [111] were strained in tension at 78 K and at the yield point rapid localised plastic deformation occurred accompanied by a large drop in load. Surface examination indicated that kinking had occurred and the crystallographic axes had rotated by ∼25° relative to the matrix crystal. The plane of the 'sharp' kink/matrix interface bisected the angle between the slip traces in the kink and those in the matrix. The kink had the form of a macroscopic shear band. In some cases, but not in all, there was an associated coarse slip band. Macroscopic crystallographic traces of the coarse slip band indicated that the slip system appeared to be (211)[-111] but, in fact, the band comprised intense aggregates of fine slip on {101} planes. A dislocation dynamics model of kinking is presented that accounts for the observed upper yield stress, yield drop, and the observed rotations of the kinked crystal and its interface with the matrix. Finally the effect of adiabatic heating of the kink and its effect on the stability of deformation is considered. © 2002 IoM Communications Ltd.en_US
dc.languageengen_US
dc.publisherManey Publishing. The Journal's web site is located at http://www.maney.co.uk/search?fwaction=show&fwid=185en_US
dc.relation.ispartofMaterials Science and Technologyen_US
dc.titleKinking in niobiumen_US
dc.typeArticleen_US
dc.identifier.emailDuggan, BJ: bjduggan@hkucc.hku.hken_US
dc.identifier.authorityDuggan, BJ=rp01686en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1179/026708302225001688en_US
dc.identifier.scopuseid_2-s2.0-0036545174en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036545174&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume18en_US
dc.identifier.issue4en_US
dc.identifier.spage449en_US
dc.identifier.epage457en_US
dc.identifier.isiWOS:000175572900015-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridChan, CY=7404814133en_US
dc.identifier.scopusauthoridReid, CN=8886069000en_US
dc.identifier.scopusauthoridDuggan, BJ=7005772998en_US

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