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Flow mechanisms in ultrafine-grained metals with an emphasis on superplasticity

Record type: Article

An analysis was conducted to examine the flow behavior of ultrafine-grained (UFG) metals produced by severe plastic deformation (SPD) processing in equal-channel angular pressing. The results reveal two distinct types of behavior. At elevated temperatures, the analysis shows that superplastic flow is accurately described by the theoretical mechanism developed for coarse-grained metals so that flow in UFG materials may be interpreted using conventional flow mechanisms. By contrast, localized small-scale grain boundary sliding is observed during deformation at low temperatures and this is attributed to the movement of extrinsic dislocations in the non-equilibrium grain boundaries produced by SPD processing

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Citation

Kawasaki, Megumi, Balasubramanian, N. and Langdon, Terence G. (2011) Flow mechanisms in ultrafine-grained metals with an emphasis on superplasticity Materials Science and Engineering: A, 528, (21), pp. 6624-6629. (doi:10.1016/j.msea.2011.05.005).

More information

e-pub ahead of print date: 14 May 2011
Published date: 15 August 2011
Organisations: Bioengineering Group

Identifiers

Local EPrints ID: 335078
URI: http://eprints.soton.ac.uk/id/eprint/335078
ISSN: 0921-5093
PURE UUID: 93b11ea6-23b8-47f3-83d9-d69b0a920773
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 14 Mar 2012 09:02
Last modified: 18 Jul 2017 06:11

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Contributors

Author: Megumi Kawasaki
Author: N. Balasubramanian

University divisions


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