Principles of self-annealing in silver processed by equal-channel angular pressing: the significance of a very low stacking fault energy
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 , 527, (3), 752-780. (doi:10.1016/j.msea.2009.08.071).
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Description/Abstract
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
| Item Type: | Article |
|---|---|
| Keywords: | severe plastic deformation, equal-channel angular pressing, ultrafine-grained materials, recovery, recrystallization, stacking fault energy |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering |
| Item ID: | 146493 |
| Date Deposited: | 21 Apr 2010 13:02 |
| Last Modified: | 01 Jun 2011 03:08 |
| Contributors: | Gubicza, J (Author) Chinh, N.Q. (Author) Lábár, J.L. (Author) Hegedüs, Z. (Author) Langdon, T.G. (Author) |
| Date: | 15 January 2010 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/146493 |
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