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Principles of self-annealing in silver processed by equal-channel angular pressing: the significance of a very low stacking fault energy

Record type: Article

Experiments were conducted to evaluate the long-term microstructural stability of silver after processing using equal-channel angular pressing (ECAP). The results show that an ultrafine-grained microstructure is produced by ECAP at room temperature but there is self-annealing in the form of recovery and recrystallization during long-term storage at room temperature. In practice, the very low stacking fault energy of silver results in a high degree of dislocation dissociation and thereby hinders recovery by cross-slip and climb. The experiments examine the evolution of microstructure and the mechanical behavior as a function of the storage time after different numbers of ECAP passes. The results demonstrate that the degree and kinetics of self-annealing depend upon the number of passes imposed in ECAP

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Citation

Gubicza, J, Chinh, N.Q., Lábár, J.L., Hegedüs, Z. and Langdon, T.G. (2010) Principles of self-annealing in silver processed by equal-channel angular pressing: the significance of a very low stacking fault energy Materials Science and Engineering: A, 527, (3), pp. 752-780. (doi:10.1016/j.msea.2009.08.071).

More information

Published date: 15 January 2010
Keywords: severe plastic deformation, equal-channel angular pressing, ultrafine-grained materials, recovery, recrystallization, stacking fault energy
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 146493
URI: http://eprints.soton.ac.uk/id/eprint/146493
ISSN: 0921-5093
PURE UUID: ebd7d7b5-c607-4fa1-a32f-342a24bc4299
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 21 Apr 2010 13:02
Last modified: 18 Jul 2017 23:04

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Contributors

Author: J Gubicza
Author: N.Q. Chinh
Author: J.L. Lábár
Author: Z. Hegedüs
Author: T.G. Langdon ORCID iD

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