Stability of microstructure in silver processed by severe plastic deformation

J. Gubicza, N. Chinh, J. Lábár, G. Tichy, Zoltán Hegedűs, Cheng Xu, Terence G. Langdon

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The stability of the microstructure of pure silver processed by equal channel angular pressing at room temperature was studied by transmission electron microscopy and X-ray line profile analysis. After processing by 1 pass the microstructure was stable, whereas after 8 passes a static recovery/recrystallization of the severely deformed microstructure was observed a long time after deformation when the material was stored at room temperature. This unusual behavior is attributed to the high degree of dislocation dissociation due to the very low stacking fault energy of silver. The highly dissociated dislocations may be annihilated a long time after deformation due to thermal activation assisted by stresses which evolve in the severely deformed microstructures.

Original languageEnglish
Pages (from-to)884-887
Number of pages4
JournalZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
Volume100
Issue number6
DOIs
Publication statusPublished - Jun 1 2009

Fingerprint

Silver
plastic deformation
Plastic deformation
silver
microstructure
Microstructure
Dislocations (crystals)
Equal channel angular pressing
stacking fault energy
Stacking faults
room temperature
pressing
Chemical activation
recovery
activation
dissociation
Transmission electron microscopy
Recovery
X rays
Temperature

Keywords

  • Dislocations
  • Recovery
  • Severe plastic deformation
  • Stacking fault energy
  • Ultrafine-grained microstructure

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Cite this

Stability of microstructure in silver processed by severe plastic deformation. / Gubicza, J.; Chinh, N.; Lábár, J.; Tichy, G.; Hegedűs, Zoltán; Xu, Cheng; Langdon, Terence G.

In: Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, Vol. 100, No. 6, 01.06.2009, p. 884-887.

Research output: Contribution to journalArticle

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