Evolution of anodic stress corrosion cracking in a coated material
(2010) 2nd Broberg Memorial Symposium 2009 165(2). p.211-221- Abstract
- In the present paper, we investigate the influence of corrosion driving forces and interfacial toughness for a coated material subjected to mechanical loading. If the protective coating is cracked, the substrate material may become exposed to a corrosive media. For a stress corrosion sensitive substrate material, this may lead to detrimental crack growth. A crack is assumed to grow by anodic dissolution, inherently leading to a blunt crack tip. The evolution of the crack surface is modelled as a moving boundary problem using an adaptive finite element method. The rate of dissolution along the crack surface in the substrate is assumed to be proportional to the chemical potential, which is function of the local surface energy density and... (More)
- In the present paper, we investigate the influence of corrosion driving forces and interfacial toughness for a coated material subjected to mechanical loading. If the protective coating is cracked, the substrate material may become exposed to a corrosive media. For a stress corrosion sensitive substrate material, this may lead to detrimental crack growth. A crack is assumed to grow by anodic dissolution, inherently leading to a blunt crack tip. The evolution of the crack surface is modelled as a moving boundary problem using an adaptive finite element method. The rate of dissolution along the crack surface in the substrate is assumed to be proportional to the chemical potential, which is function of the local surface energy density and elastic strain energy density. The surface energy tends to flatten the surface, whereas the strain energy due to stress concentration promotes material dissolution. The influence of the interface energy density parameter for the solid-fluid combination, interface corrosion resistance and stiffness ratios between coating and substrate is investigated. Three characteristic crack shapes are obtained; deepening and narrowing single cracks, branched cracks and sharp interface cracks. The crack shapes obtained by our simulations are similar to real sub-coating cracks reported in the literature. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1697427
- author
- Bjerkén, Christina LU and Ortiz, M.
- organization
- publishing date
- 2010
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Interface toughness, Strain energy density, energy density, Surface, Moving boundary problem, Stress corrosion, Layered material
- host publication
- International Journal of Fracture
- volume
- 165
- issue
- 2
- pages
- 211 - 221
- publisher
- Springer
- conference name
- 2nd Broberg Memorial Symposium 2009
- conference location
- Lund, Sweden
- conference dates
- 2009-05-25 - 2009-05-26
- external identifiers
-
- wos:000281680600008
- scopus:77956393218
- ISSN
- 0376-9429
- 1573-2673
- DOI
- 10.1007/s10704-010-9514-5
- language
- English
- LU publication?
- yes
- id
- 04f8089a-f2fe-4152-87bb-ed2b9803601a (old id 1697427)
- date added to LUP
- 2016-04-01 10:39:36
- date last changed
- 2024-01-06 21:56:06
@inproceedings{04f8089a-f2fe-4152-87bb-ed2b9803601a,
abstract = {{In the present paper, we investigate the influence of corrosion driving forces and interfacial toughness for a coated material subjected to mechanical loading. If the protective coating is cracked, the substrate material may become exposed to a corrosive media. For a stress corrosion sensitive substrate material, this may lead to detrimental crack growth. A crack is assumed to grow by anodic dissolution, inherently leading to a blunt crack tip. The evolution of the crack surface is modelled as a moving boundary problem using an adaptive finite element method. The rate of dissolution along the crack surface in the substrate is assumed to be proportional to the chemical potential, which is function of the local surface energy density and elastic strain energy density. The surface energy tends to flatten the surface, whereas the strain energy due to stress concentration promotes material dissolution. The influence of the interface energy density parameter for the solid-fluid combination, interface corrosion resistance and stiffness ratios between coating and substrate is investigated. Three characteristic crack shapes are obtained; deepening and narrowing single cracks, branched cracks and sharp interface cracks. The crack shapes obtained by our simulations are similar to real sub-coating cracks reported in the literature.}},
author = {{Bjerkén, Christina and Ortiz, M.}},
booktitle = {{International Journal of Fracture}},
issn = {{0376-9429}},
keywords = {{Interface toughness; Strain energy density; energy density; Surface; Moving boundary problem; Stress corrosion; Layered material}},
language = {{eng}},
number = {{2}},
pages = {{211--221}},
publisher = {{Springer}},
title = {{Evolution of anodic stress corrosion cracking in a coated material}},
url = {{http://dx.doi.org/10.1007/s10704-010-9514-5}},
doi = {{10.1007/s10704-010-9514-5}},
volume = {{165}},
year = {{2010}},
}