Void growth by dislocation adsorption

R. B. Sills, B. L. Boyce

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We propose a dislocation adsorption-based mechanism for void growth in metals, wherein a void grows as dislocations from the bulk annihilate at its surface. The basic process is governed by glide and cross-slip of dislocations at the surface of a void. Using molecular dynamics simulations we show that when dislocations are present around a void, growth occurs more quickly and at much lower stresses than when the crystal is initially dislocation-free. Finally, we show that adsorption-mediated growth predicts an exponential dependence on the hydrostatic stress, consistent with the well-known Rice-Tracey equation.

Original languageEnglish (US)
Pages (from-to)103-109
Number of pages7
JournalMaterials Research Letters
Volume8
Issue number3
DOIs
StatePublished - Mar 3 2020

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Keywords

  • Void
  • dislocation
  • plasticity
  • rupture

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