Grain boundary formation by remnant dislocations from the de-twinning of thin nano-twins
Grain boundary formation by remnant dislocations from the de-twinning of thin nano-twins
We report a grain boundary formation mechanism in face-centred cubic metals with low stacking fault energies. Severe plastic deformation produces primary nano-twins with a twin boundary spacing of several nanometres, followed by secondary twinning through the activation of Shockley partial dislocations. The partial dislocations interact with primary twin boundaries, resulting in de-twinning of the primary twins and producing very high densities of sessile dislocations. The accumulation of these dislocations produces new grain boundaries with neighbouring grains having similar orientations.
grain boundary, twinning, de-twinning, grain refinement, steel
98-101
Cao, Y.
2a06c7de-86c5-4804-ab45-20266cbea4cf
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
An, X.H.
18016416-a17d-4882-aaa6-5a3c1160e9a9
Liao, X.Z.
f0645a6d-aee1-4d28-aa13-f1b00fdedc41
Kawasaki, M.
d0ce18b9-8403-4db2-9cb2-3a6165f288a6
Ringer, S.P.
2b986d4b-e93c-4801-9a1b-b16b39c30242
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Zhu, Y.T.
ddbd5b30-13ca-45a6-9296-ed5b60811efb
15 April 2015
Cao, Y.
2a06c7de-86c5-4804-ab45-20266cbea4cf
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
An, X.H.
18016416-a17d-4882-aaa6-5a3c1160e9a9
Liao, X.Z.
f0645a6d-aee1-4d28-aa13-f1b00fdedc41
Kawasaki, M.
d0ce18b9-8403-4db2-9cb2-3a6165f288a6
Ringer, S.P.
2b986d4b-e93c-4801-9a1b-b16b39c30242
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Zhu, Y.T.
ddbd5b30-13ca-45a6-9296-ed5b60811efb
Cao, Y., Wang, Y.B., An, X.H., Liao, X.Z., Kawasaki, M., Ringer, S.P., Langdon, T.G. and Zhu, Y.T.
(2015)
Grain boundary formation by remnant dislocations from the de-twinning of thin nano-twins.
Scripta Materialia, 100, .
(doi:10.1016/j.scriptamat.2015.01.001).
Abstract
We report a grain boundary formation mechanism in face-centred cubic metals with low stacking fault energies. Severe plastic deformation produces primary nano-twins with a twin boundary spacing of several nanometres, followed by secondary twinning through the activation of Shockley partial dislocations. The partial dislocations interact with primary twin boundaries, resulting in de-twinning of the primary twins and producing very high densities of sessile dislocations. The accumulation of these dislocations produces new grain boundaries with neighbouring grains having similar orientations.
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More information
Accepted/In Press date: 2 January 2015
e-pub ahead of print date: 14 January 2015
Published date: 15 April 2015
Keywords:
grain boundary, twinning, de-twinning, grain refinement, steel
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 377265
URI: http://eprints.soton.ac.uk/id/eprint/377265
ISSN: 1359-6462
PURE UUID: 35087237-a479-4e56-905c-2a93a5e249d2
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Date deposited: 20 May 2015 10:40
Last modified: 15 Mar 2024 03:14
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Contributors
Author:
Y. Cao
Author:
Y.B. Wang
Author:
X.H. An
Author:
X.Z. Liao
Author:
M. Kawasaki
Author:
S.P. Ringer
Author:
Y.T. Zhu
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