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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

Gubicza, Jenő and Nguyen Quang, Chinh and Lábár, János and Hegedűs, Zoltán and Langdon, Terence 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-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCURE AND PROCESSING, 527. pp. 752-760. ISSN 0921-5093

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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
Uncontrolled Keywords: texture; CUBIC METALS; NANOCRYSTALLINE COPPER; NANOSTRUCTURED MATERIALS; MICROSTRUCTURAL EVOLUTION; ROOM-TEMPERATURE; HIGH-PURITY ALUMINUM; SEVERE PLASTIC-DEFORMATION; Stacking fault energy; recrystallization; RECOVERY; Ultrafine-grained materials; Equal-channel angular pressing; Severe plastic deformation
Subjects: Q Science / természettudomány > QC Physics / fizika > QC06 Physics of condensed matter / szilárdtestfizika
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 20 Jun 2014 05:28
Last Modified: 20 Jun 2014 08:06
URI: http://real.mtak.hu/id/eprint/13275

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