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The effect of a low angle grain boundary on the short fatigue crack growth

Hansson, Per LU and Melin, Solveig LU (2011) 6th International Conference on Materials Structure and Micromechanics of Fracture In Key Engineering Materials 465. p.362-365
Abstract
The influence on the fatigue crack growth behaviour of a short edge crack due to different configurations of a nearby located low angle grain boundary is investigated under quasi-static and plane strain conditions. The geometry is modelled by dislocation dipole elements in a boundary element approach, and the plasticity is modelled by discrete dislocations. The crack is assumed to grow in a single shear mechanism due to nucleation, glide and annihilation of dislocations in the material. It was found that the sign of the dislocations in the grain boundary, the distances between them and the placement of the dislocations in the grain boundary with respect to preferred slip plane directions, all strongly influenced the growth behaviour.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Key Engineering Materials
volume
465
pages
362 - 365
publisher
Trans Tech Publications Ltd
conference name
6th International Conference on Materials Structure and Micromechanics of Fracture
external identifiers
  • scopus:79952860141
  • wos:000291704700083
ISSN
1013-9826
DOI
10.4028/www.scientific.net/KEM.465.362
language
English
LU publication?
yes
id
26833217-7cb8-4ea4-b33a-f64e1860520e (old id 2855915)
date added to LUP
2012-07-16 10:25:10
date last changed
2017-01-01 05:59:54
@article{26833217-7cb8-4ea4-b33a-f64e1860520e,
  abstract     = {The influence on the fatigue crack growth behaviour of a short edge crack due to different configurations of a nearby located low angle grain boundary is investigated under quasi-static and plane strain conditions. The geometry is modelled by dislocation dipole elements in a boundary element approach, and the plasticity is modelled by discrete dislocations. The crack is assumed to grow in a single shear mechanism due to nucleation, glide and annihilation of dislocations in the material. It was found that the sign of the dislocations in the grain boundary, the distances between them and the placement of the dislocations in the grain boundary with respect to preferred slip plane directions, all strongly influenced the growth behaviour.},
  author       = {Hansson, Per and Melin, Solveig},
  issn         = {1013-9826},
  language     = {eng},
  pages        = {362--365},
  publisher    = {Trans Tech Publications Ltd},
  series       = {Key Engineering Materials},
  title        = {The effect of a low angle grain boundary on the short fatigue crack growth},
  url          = {http://dx.doi.org/10.4028/www.scientific.net/KEM.465.362},
  volume       = {465},
  year         = {2011},
}