Dislocation pattern formation - Simulations of annealing in two dimensions

Nathan Argaman, Ohad Levy, Guy Makov

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A two-dimensional discrete dislocation dynamics code was developed and used to simulate dislocation patterning. For the present study of annealing, both glide and some climb were allowed in the simulations. In these circumstances patterning takes place even in the absence of external stresses and of dislocation sources. A triangular underlying lattice was assumed, with the three slip systems equally populated initially. Well-defined dislocation walls and cells are observed to form from random initial conditions. The structure coarsens with time, i.e. the typical size of the cells increases as annealing takes place (the smaller cells shrink and disappear from the structure). In the spirit of a bottom-up multiscale approach, it is suggested that a new simulation methodology should be developed, in which the discrete moving objects will be dislocation wall segments rather than individual dislocations.

Original languageEnglish
Title of host publicationMaterial Instabilities and Patterning in Metals
PublisherMaterials Research Society
Pages26-31
Number of pages6
ISBN (Print)1558996192, 9781558996199
DOIs
StatePublished - 1 Jan 2001
Externally publishedYes
Event2001 MRS Spring Meeting - San Francisco, CA, United States
Duration: 16 Apr 200120 Apr 2001

Publication series

NameMaterials Research Society Symposium Proceedings
Volume683
ISSN (Print)0272-9172

Conference

Conference2001 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA
Period16/04/0120/04/01

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