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Elemental redistribution in a nanocrystalline Ni–Fe alloy induced by high-pressure torsion

Elemental redistribution in a nanocrystalline Ni–Fe alloy induced by high-pressure torsion
Elemental redistribution in a nanocrystalline Ni–Fe alloy induced by high-pressure torsion
An electrochemically deposited nanocrystalline supersaturated face-centred-cubic Ni–21 at.% Fe alloy with an initial average grain size of ?21 nm was processed using high-pressure torsion (HPT) that resulted in grain growth via grain rotation and coalescence to an average grain size of ?53 nm. Atom probe tomography investigations revealed that the supersaturated Ni–Fe solid solution was stable under HPT and that C and S atoms, which are the major impurities in the material and segregated to the grain boundaries (GBs) of the as-deposited material, migrated from disappearing GBs to the remaining GBs during HPT. We propose that the elemental redistribution was facilitated by GB diffusion and the motion of a large volume of HPT-induced defects at the GB regions during the grain growth process. This elemental redistribution process is different from other HPT-induced elemental redistribution processes reported in the literature
0921-5093
7500-7505
Ni, S.
c17ef5a0-a786-46ea-8c68-2cddc3c6a9fc
Sha, G.
5f1b8bea-6129-426f-870e-988902682b1e
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
Liao, X.Z.
f0645a6d-aee1-4d28-aa13-f1b00fdedc41
Alhajeri, S.N.
50d87cc2-4f8b-40ec-933c-240036c14b12
Li, H.Q.
f75bd557-296e-47bb-98de-f302465c59f5
Zhu, Y.T.
ddbd5b30-13ca-45a6-9296-ed5b60811efb
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Ringer, S.P.
2b986d4b-e93c-4801-9a1b-b16b39c30242
Ni, S.
c17ef5a0-a786-46ea-8c68-2cddc3c6a9fc
Sha, G.
5f1b8bea-6129-426f-870e-988902682b1e
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
Liao, X.Z.
f0645a6d-aee1-4d28-aa13-f1b00fdedc41
Alhajeri, S.N.
50d87cc2-4f8b-40ec-933c-240036c14b12
Li, H.Q.
f75bd557-296e-47bb-98de-f302465c59f5
Zhu, Y.T.
ddbd5b30-13ca-45a6-9296-ed5b60811efb
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Ringer, S.P.
2b986d4b-e93c-4801-9a1b-b16b39c30242

Ni, S., Sha, G., Wang, Y.B., Liao, X.Z., Alhajeri, S.N., Li, H.Q., Zhu, Y.T., Langdon, T.G. and Ringer, S.P. (2011) Elemental redistribution in a nanocrystalline Ni–Fe alloy induced by high-pressure torsion. Materials Science and Engineering: A, 528 (25-26), 7500-7505. (doi:10.1016/j.msea.2011.06.057).

Record type: Article

Abstract

An electrochemically deposited nanocrystalline supersaturated face-centred-cubic Ni–21 at.% Fe alloy with an initial average grain size of ?21 nm was processed using high-pressure torsion (HPT) that resulted in grain growth via grain rotation and coalescence to an average grain size of ?53 nm. Atom probe tomography investigations revealed that the supersaturated Ni–Fe solid solution was stable under HPT and that C and S atoms, which are the major impurities in the material and segregated to the grain boundaries (GBs) of the as-deposited material, migrated from disappearing GBs to the remaining GBs during HPT. We propose that the elemental redistribution was facilitated by GB diffusion and the motion of a large volume of HPT-induced defects at the GB regions during the grain growth process. This elemental redistribution process is different from other HPT-induced elemental redistribution processes reported in the literature

Full text not available from this repository.

More information

e-pub ahead of print date: 25 June 2011
Published date: 25 September 2011
Organisations: Bioengineering Group

Identifiers

Local EPrints ID: 335080
URI: http://eprints.soton.ac.uk/id/eprint/335080
ISSN: 0921-5093
PURE UUID: 7b2d7ec6-7b76-4202-aeb7-d6fd9822696d
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 14 Mar 2012 09:06
Last modified: 31 Jul 2019 00:44

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