Grain size effect on deformation twinning and de-twinning in a nanocrystalline Ni-Fe alloy
Grain size effect on deformation twinning and de-twinning in a nanocrystalline Ni-Fe alloy
The effect of grain size on the deformation twinning and de-twinning in a nanocrystalline Ni-Fe alloy was investigated using transmission electron microscopy. Specimens with different grain sizes were obtained by severely deforming an electrochemically deposited nanocrystalline Ni-20wt.% Fe alloy using high-pressure torsion, which resulted in continuous grain growth from an average grain size of ~ 21 nm in the as-deposited material to ~ 72 nm for the highest strain applied in this study. Results show that deformation de-twinning occurs at very small grain sizes while deformation twinning takes place when the grain size is larger than ~ 45 nm. The mechanism of the observed grain size effect on twinning and de-twinning is briefly discussed.
181-186
Ni, S.
c17ef5a0-a786-46ea-8c68-2cddc3c6a9fc
Wang, Y.B.
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Liao, X. Z.
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Alhajeri, S.N.
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Li, Hh. Q.
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Ringer, S. P.
efde4593-1f69-4845-88da-a0997de34cb0
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Zhu, Y.T.
ddbd5b30-13ca-45a6-9296-ed5b60811efb
2011
Ni, S.
c17ef5a0-a786-46ea-8c68-2cddc3c6a9fc
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
Liao, X. Z.
8059e424-5c43-44fa-b381-e51d040622fe
Alhajeri, S.N.
4d3f50b6-87ab-4690-87dd-bea08fb1c77f
Li, Hh. Q.
112e7864-fe33-469d-ad11-579bdcfe8a2e
Ringer, S. P.
efde4593-1f69-4845-88da-a0997de34cb0
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Zhu, Y.T.
ddbd5b30-13ca-45a6-9296-ed5b60811efb
Ni, S., Wang, Y.B., Liao, X. Z., Alhajeri, S.N., Li, Hh. Q., Ringer, S. P., Langdon, T.G. and Zhu, Y.T.
(2011)
Grain size effect on deformation twinning and de-twinning in a nanocrystalline Ni-Fe alloy.
Materials Science Forum, (667-669), .
(doi:10.4028/www.scientific.net/MSF).
Abstract
The effect of grain size on the deformation twinning and de-twinning in a nanocrystalline Ni-Fe alloy was investigated using transmission electron microscopy. Specimens with different grain sizes were obtained by severely deforming an electrochemically deposited nanocrystalline Ni-20wt.% Fe alloy using high-pressure torsion, which resulted in continuous grain growth from an average grain size of ~ 21 nm in the as-deposited material to ~ 72 nm for the highest strain applied in this study. Results show that deformation de-twinning occurs at very small grain sizes while deformation twinning takes place when the grain size is larger than ~ 45 nm. The mechanism of the observed grain size effect on twinning and de-twinning is briefly discussed.
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Published date: 2011
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 187529
URI: http://eprints.soton.ac.uk/id/eprint/187529
ISSN: 1662-9752
PURE UUID: e0dae333-052b-4401-b908-396b15c02f05
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Date deposited: 17 May 2011 09:58
Last modified: 15 Mar 2024 03:13
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Author:
S. Ni
Author:
Y.B. Wang
Author:
X. Z. Liao
Author:
S.N. Alhajeri
Author:
Hh. Q. Li
Author:
S. P. Ringer
Author:
Y.T. Zhu
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