A two-dimensional mesoscale model for intergranular stress corrosion crack propagation

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A two-dimensional mesoscale model for intergranular stress corrosion crack propagation

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Publication Article, peer reviewed scientific
Title A two-dimensional mesoscale model for intergranular stress corrosion crack propagation
Author(s) Jivkov, Andrey ; Stevens, N.P.C. ; Marrow, T.J
Date 2006
English abstract
A mechanical model for simulating intergranular stress corrosion cracking is presented. The model has been developed to address the limitations of percolation-like models, which do not account for the mechanical crack driving force and cannot capture experimentally observed phenomena such as the formation of ductile bridging ligaments by resistant boundaries. The model is based on a regular representation of material microstructure and a categorisation of grain boundaries as susceptible and resistant to corrosion. Crack propagation in two-dimensional microstructures with several fractions of experimentally observed susceptible boundaries is studied. Monte Carlo-type simulations with random distributions of boundaries and a range of susceptible and resistant boundary failure strengths are performed. The effects of crack bridging and crack branching are quantified. It is concluded that together with the fraction of susceptible boundaries, the resistant boundary failure strength is the significant parameter controlling the shielding effect of bridges on crack propagation.
DOI http://dx.doi.org/10.1016/j.actamat.2006.03.030 (link to publisher's fulltext)
Host/Issue Acta Materialia;13
Volume 54
ISSN 1359-6454
Pages 3493-3501
Language eng (iso)
Subject(s) Technology
Research Subject Categories::TECHNOLOGY::Materials science
Note select contributions from the meeting ‘‘Micromechanics and Microstructure Evolution: Modeling, Simulation and Experiments’’, held in Madrid, Spain, September 11–16, 2005
Handle http://hdl.handle.net/2043/4774 (link to this page)

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