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

J. Gubicza, N. Chinh, J. Lábár, Zoltán Hegedus, Terence G. Langdon

Research output: Contribution to journalArticle

61 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)752-760
Number of pages9
JournalMaterials Science and Engineering A
Volume527
Issue number3
DOIs
Publication statusPublished - Jan 15 2010

Fingerprint

Equal channel angular pressing
stacking fault energy
Stacking faults
pressing
Silver
silver
Annealing
annealing
recovery
Recovery
microstructure
Microstructure
room temperature
slip
Experiments
dissociation
Temperature
Kinetics
kinetics
Processing

Keywords

  • Equal-channel angular pressing
  • Recovery
  • Recrystallization
  • Severe plastic deformation
  • Stacking fault energy
  • Ultrafine-grained materials

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

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.; Lábár, J.; Hegedus, Zoltán; Langdon, Terence G.

In: Materials Science and Engineering A, Vol. 527, No. 3, 15.01.2010, p. 752-760.

Research output: Contribution to journalArticle

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AU - Langdon, Terence G.

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