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Article: On cells and microbands formed in an interstitial-free steel during cold rolling at low to medium reductions

TitleOn cells and microbands formed in an interstitial-free steel during cold rolling at low to medium reductions
Authors
Issue Date2004
Citation
Metallurgical And Materials Transactions A: Physical Metallurgy And Materials Science, 2004, v. 35 A n. 11, p. 3423-3430 How to Cite?
AbstractThe cold-rolled microstructure formed in ah interstitial-free (IF) steel from low to medium reductions has been investigated by using transmission electron microscopy. Dislocation cells formed early in the process and reduced in size until a critical strain was reached, beyond which they remained at a constant size of ∼1-μm diameter. The critical strain coincided with the formation of microbands, and it is proposed here that microbands carry all the deformation from their creation, rendering cell refinement unnecessary. Furthermore, since the dislocation densities of meshes and cells are almost identical and the stored elastic energy Ecell is always less than E mesh, it is proposed that cells are derived from the dislocation mesh structure. Microbands grow quickly to a length that is limited by grain boundaries. The thermodynamic condition favoring microband formation is (∂EMB/∂ρ) < (∂E Cell/∂ρ), and the microbands are not derived from cell structures but from dislocation sheets or walls on which deformation is concentrated.
Persistent Identifierhttp://hdl.handle.net/10722/174057
ISSN
2015 Impact Factor: 1.749
2015 SCImago Journal Rankings: 1.222
References

 

DC FieldValueLanguage
dc.contributor.authorChen, QZen_US
dc.contributor.authorDuggan, BJen_US
dc.date.accessioned2012-11-14T06:20:26Z-
dc.date.available2012-11-14T06:20:26Z-
dc.date.issued2004en_US
dc.identifier.citationMetallurgical And Materials Transactions A: Physical Metallurgy And Materials Science, 2004, v. 35 A n. 11, p. 3423-3430en_US
dc.identifier.issn1073-5623en_US
dc.identifier.urihttp://hdl.handle.net/10722/174057-
dc.description.abstractThe cold-rolled microstructure formed in ah interstitial-free (IF) steel from low to medium reductions has been investigated by using transmission electron microscopy. Dislocation cells formed early in the process and reduced in size until a critical strain was reached, beyond which they remained at a constant size of ∼1-μm diameter. The critical strain coincided with the formation of microbands, and it is proposed here that microbands carry all the deformation from their creation, rendering cell refinement unnecessary. Furthermore, since the dislocation densities of meshes and cells are almost identical and the stored elastic energy Ecell is always less than E mesh, it is proposed that cells are derived from the dislocation mesh structure. Microbands grow quickly to a length that is limited by grain boundaries. The thermodynamic condition favoring microband formation is (∂EMB/∂ρ) < (∂E Cell/∂ρ), and the microbands are not derived from cell structures but from dislocation sheets or walls on which deformation is concentrated.en_US
dc.languageengen_US
dc.relation.ispartofMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Scienceen_US
dc.titleOn cells and microbands formed in an interstitial-free steel during cold rolling at low to medium reductionsen_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.scopuseid_2-s2.0-10244219881en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-10244219881&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume35 Aen_US
dc.identifier.issue11en_US
dc.identifier.spage3423en_US
dc.identifier.epage3430en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChen, QZ=8353179600en_US
dc.identifier.scopusauthoridDuggan, BJ=7005772998en_US

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