Energy barrier for homogeneous dislocation nucleation: Comparing atomistic and continuum models

Sylvie Aubry, Keonwook Kang, Seunghwa Ryu, Wei Cai

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

We compare the energy barriers predicted by continuum mechanics models for homogeneous dislocation nucleation in copper with explicit atomistic calculations. We find that a relatively simple continuum model can agree with full atomistic calculations if the dislocation Burgers vector is allowed to increase continuously during nucleation. The analysis identifies the significant effect of the applied shear stress on the generalized stacking fault energy and leads to a more physical definition of the ideal shear strength.

Original languageEnglish
Pages (from-to)1043-1046
Number of pages4
JournalScripta Materialia
Volume64
Issue number11
DOIs
Publication statusPublished - 2011 Jun 1

Fingerprint

Energy barriers
Nucleation
nucleation
continuums
Burgers vector
stacking fault energy
continuum mechanics
Continuum mechanics
shear strength
Stacking faults
Dislocations (crystals)
Shear strength
shear stress
Shear stress
Copper
copper
energy

All Science Journal Classification (ASJC) codes

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

Cite this

Aubry, Sylvie ; Kang, Keonwook ; Ryu, Seunghwa ; Cai, Wei. / Energy barrier for homogeneous dislocation nucleation : Comparing atomistic and continuum models. In: Scripta Materialia. 2011 ; Vol. 64, No. 11. pp. 1043-1046.
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Energy barrier for homogeneous dislocation nucleation : Comparing atomistic and continuum models. / Aubry, Sylvie; Kang, Keonwook; Ryu, Seunghwa; Cai, Wei.

In: Scripta Materialia, Vol. 64, No. 11, 01.06.2011, p. 1043-1046.

Research output: Contribution to journalArticle

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