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Influence of stacking fault energy on deformation mechanism and dislocation storage capacity in ultrafine-grained materials

Influence of stacking fault energy on deformation mechanism and dislocation storage capacity in ultrafine-grained materials
Influence of stacking fault energy on deformation mechanism and dislocation storage capacity in ultrafine-grained materials
Partial dislocation emission from grain boundaries in metals with medium-to-high stacking fault energies is observed primarily in the grain size range of a few tens of nanometers. Here we report that a reduction in the stacking fault energy permits the emission of partial dislocations from grain boundaries in ultrafine-grained materials with grain sizes significantly larger than 100 nm and this produces twinning. Such twins are effective in increasing the dislocation storage capacity, which may be used to improve the ductility
ultrafine-grained materials, deformation mechanism, stacking fault energy
1359-6462
52-55
Wang, Z.W.
c98a5421-81cd-471e-b7fb-37269b6a3b15
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
Liao, X.Z.
f0645a6d-aee1-4d28-aa13-f1b00fdedc41
Zhao, Y.H.
4fea315b-8c7d-4bb1-badc-236b309ef228
Lavernia, Y.T.
bc80e177-b7ca-4b2e-b535-84ff45bbc29b
Zhu, Y.T.
ddbd5b30-13ca-45a6-9296-ed5b60811efb
Horita, Z.
84a80017-cbaf-4713-8346-6f69ac7ea63e
Langdon, T.G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Wang, Z.W.
c98a5421-81cd-471e-b7fb-37269b6a3b15
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
Liao, X.Z.
f0645a6d-aee1-4d28-aa13-f1b00fdedc41
Zhao, Y.H.
4fea315b-8c7d-4bb1-badc-236b309ef228
Lavernia, Y.T.
bc80e177-b7ca-4b2e-b535-84ff45bbc29b
Zhu, Y.T.
ddbd5b30-13ca-45a6-9296-ed5b60811efb
Horita, Z.
84a80017-cbaf-4713-8346-6f69ac7ea63e
Langdon, T.G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Wang, Z.W., Wang, Y.B., Liao, X.Z., Zhao, Y.H., Lavernia, Y.T., Zhu, Y.T., Horita, Z. and Langdon, T.G (2009) Influence of stacking fault energy on deformation mechanism and dislocation storage capacity in ultrafine-grained materials. Scripta Materialia, 60 (1), 52-55. (doi:10.1016/j.scriptamat.2008.08.032).

Record type: Article

Abstract

Partial dislocation emission from grain boundaries in metals with medium-to-high stacking fault energies is observed primarily in the grain size range of a few tens of nanometers. Here we report that a reduction in the stacking fault energy permits the emission of partial dislocations from grain boundaries in ultrafine-grained materials with grain sizes significantly larger than 100 nm and this produces twinning. Such twins are effective in increasing the dislocation storage capacity, which may be used to improve the ductility

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More information

Published date: January 2009
Keywords: ultrafine-grained materials, deformation mechanism, stacking fault energy
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 67340
URI: https://eprints.soton.ac.uk/id/eprint/67340
ISSN: 1359-6462
PURE UUID: 32947403-9844-4f8a-8da1-68dc69767e99
ORCID for T.G Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 19 Aug 2009
Last modified: 06 Jun 2018 12:48

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