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A study of the influence of grain boundaries on short crack growth during varying load using a dislocation technique

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Author

Summary, in English

The propagation of short cracks in the neighbourhood of grain boundaries have been investigated using a technique were the crack is modelled by distributed dislocation dipoles and the plastic deformation is represented by discrete dislocations. Discrete dislocations are emitted from the crack tip as the crack grows. Dislocations can also nucleate at the grain boundaries. The influence on crack growth characteristics of the distance between the initial crack tip and the grain boundary has been studied. It was found that crack growth rate is strongly correlated to the dislocation pile-ups at the grain boundaries. (C) 2004 Elsevier Ltd. All rights reserved.

Publishing year

2004

Language

English

Pages

2215-2227

Publication/Series

Engineering Fracture Mechanics

Volume

71

Issue

15

Document type

Journal article

Publisher

Elsevier

Topic

  • Materials Engineering
  • Applied Mechanics

Keywords

  • boundary
  • grain
  • short crack growth
  • dislocation dipoles
  • discrete dislocations
  • dislocation nucleation

Status

Published

ISBN/ISSN/Other

  • ISSN: 1873-7315