Grain growth and dislocation density evolution in a nanocrystalline Ni–Fe alloy induced by high-pressure torsion
Grain growth and dislocation density evolution in a nanocrystalline Ni–Fe alloy induced by high-pressure torsion
The structural evolution of a nanocrystalline Ni–Fe alloy induced by high-pressure torsion (HPT) was investigated. HPT-induced grain growth occurred via grain rotation and coalescence, forming three-dimensional small-angle sub-grain boundaries. Further deformation eliminates the sub-grain boundaries from which dislocations glide away on different {1 1 1} planes. A significant number of these dislocations come together to form Lomer–Cottrell locks that effectively increase the dislocation storage capacity of the nanocrystalline material. These observations may help with developing strong and ductile nanocrystalline materials.
severe plastic deformation, nanocrystalline materials, dislocation density, high-pressure torsion
327-330
Ni, S.
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Wang, Y.B.
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Liao, X.Z.
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Alhajeri, S.N.
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Li, H.Q.
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Zhao, Y.H.
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Lavernia,, E.J.
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Ringer, S.P.
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Langdon, T.G.
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Zhu, Y.T.
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February 2011
Ni, S.
c17ef5a0-a786-46ea-8c68-2cddc3c6a9fc
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
Liao, X.Z.
f0645a6d-aee1-4d28-aa13-f1b00fdedc41
Alhajeri, S.N.
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Li, H.Q.
f75bd557-296e-47bb-98de-f302465c59f5
Zhao, Y.H.
4fea315b-8c7d-4bb1-badc-236b309ef228
Lavernia,, E.J.
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Ringer, S.P.
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Langdon, T.G.
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Zhu, Y.T.
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Ni, S., Wang, Y.B., Liao, X.Z., Alhajeri, S.N., Li, H.Q., Zhao, Y.H., Lavernia,, E.J., Ringer, S.P., Langdon, T.G. and Zhu, Y.T.
(2011)
Grain growth and dislocation density evolution in a nanocrystalline Ni–Fe alloy induced by high-pressure torsion.
Scripta Materialia, 64 (4), .
(doi:10.1016/j.scriptamat.2010.10.027).
Abstract
The structural evolution of a nanocrystalline Ni–Fe alloy induced by high-pressure torsion (HPT) was investigated. HPT-induced grain growth occurred via grain rotation and coalescence, forming three-dimensional small-angle sub-grain boundaries. Further deformation eliminates the sub-grain boundaries from which dislocations glide away on different {1 1 1} planes. A significant number of these dislocations come together to form Lomer–Cottrell locks that effectively increase the dislocation storage capacity of the nanocrystalline material. These observations may help with developing strong and ductile nanocrystalline materials.
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Published date: February 2011
Keywords:
severe plastic deformation, nanocrystalline materials, dislocation density, high-pressure torsion
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 170921
URI: http://eprints.soton.ac.uk/id/eprint/170921
ISSN: 1359-6462
PURE UUID: 79c5fd13-bd34-40e7-8ab3-1c34c7adb48c
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Date deposited: 11 Jan 2011 15:31
Last modified: 14 Mar 2024 02:47
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Contributors
Author:
S. Ni
Author:
Y.B. Wang
Author:
X.Z. Liao
Author:
S.N. Alhajeri
Author:
H.Q. Li
Author:
Y.H. Zhao
Author:
E.J. Lavernia,
Author:
S.P. Ringer
Author:
Y.T. Zhu
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