Monitoring of self-annealing in ultrafine-grained silver using nanoindentation
Monitoring of self-annealing in ultrafine-grained silver using nanoindentation
The self-annealing of an ultrafine-grained (UFG) microstructure in pure silver produced by severe plastic deformation (SPD) was studied by nanoindentation and X-ray line profile analysis. Both recovery and recrystallization of the UFG structure take place during long-term storage at room temperature as a result of the extremely high dislocation density which acts as a driving force in self-annealing. Nanohardness mapping revealed that self-annealing occurred inhomogeneously, and the higher strain imposed in SPD processing leads to faster recrystallization in severely deformed silver. This behavior of self-annealing can be explained by the enhanced contribution of twinning which facilitates the formation of recrystallized embryos.
severe plastic deformation, equal-channel angular pressing, ultrafine-grained materials, recovery, recrystallization, nanoindentation
294-297
Gubicza, Jenö
4597447b-054d-4bc2-8588-107ebe212c3f
Chinh, Nguyen Q.
8e075269-61a9-469c-8f71-3d52eb37dadc
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
December 2010
Gubicza, Jenö
4597447b-054d-4bc2-8588-107ebe212c3f
Chinh, Nguyen Q.
8e075269-61a9-469c-8f71-3d52eb37dadc
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Gubicza, Jenö, Chinh, Nguyen Q. and Langdon, Terence G.
(2010)
Monitoring of self-annealing in ultrafine-grained silver using nanoindentation.
Nanoscience and Nanotechnology Letters, 2 (4), .
(doi:10.1166/nnl.2010.1096).
Abstract
The self-annealing of an ultrafine-grained (UFG) microstructure in pure silver produced by severe plastic deformation (SPD) was studied by nanoindentation and X-ray line profile analysis. Both recovery and recrystallization of the UFG structure take place during long-term storage at room temperature as a result of the extremely high dislocation density which acts as a driving force in self-annealing. Nanohardness mapping revealed that self-annealing occurred inhomogeneously, and the higher strain imposed in SPD processing leads to faster recrystallization in severely deformed silver. This behavior of self-annealing can be explained by the enhanced contribution of twinning which facilitates the formation of recrystallized embryos.
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Published date: December 2010
Keywords:
severe plastic deformation, equal-channel angular pressing, ultrafine-grained materials, recovery, recrystallization, nanoindentation
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 170895
URI: http://eprints.soton.ac.uk/id/eprint/170895
ISSN: 1941-4900
PURE UUID: 16d51850-a61f-4974-806f-b5c2974d8752
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Date deposited: 11 Jan 2011 12:20
Last modified: 14 Mar 2024 02:47
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Author:
Jenö Gubicza
Author:
Nguyen Q. Chinh
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