Corrosion crack growth in a bi-material system
(2003) ICM9 - 9th International Conference on the Mechanical Behavior of Materials- Abstract
- Bi-materials composed of thin layers ideally bonded to large substrates are considered. Cracks emerging from an almost flat surface and propagating through the bi-materials are studied. The cracks acquire realistic geometrical shapes, where the tips are integral parts of the crack surfaces. Crack propagation is related to surface evolution resulting from material loss due to corrosion. Controlling mechanism for the evolution is the rupture of a brittle passive film, which is frequently building-up along the surface. The evolution rate is a function of the degree of film damage caused by the surface straining. The model leads to a moving boundary formulation, for which a numerical solution is used. The mismatch of the material plastic... (More)
- Bi-materials composed of thin layers ideally bonded to large substrates are considered. Cracks emerging from an almost flat surface and propagating through the bi-materials are studied. The cracks acquire realistic geometrical shapes, where the tips are integral parts of the crack surfaces. Crack propagation is related to surface evolution resulting from material loss due to corrosion. Controlling mechanism for the evolution is the rupture of a brittle passive film, which is frequently building-up along the surface. The evolution rate is a function of the degree of film damage caused by the surface straining. The model leads to a moving boundary formulation, for which a numerical solution is used. The mismatch of the material plastic properties is being varied in the study. The results show how cracks pass the interface. The growth rate variation close to the interface is studied. Typical surface evolution for a crack passing through a soft-hard material interface is presented. The resulting crack morphology of the model resembles what has been observed in reality. It is shown how the results can be used in designing bi-material systems to inhibit corrosion crack growth. (Less)
- Abstract (Swedish)
- Bi-materials composed of thin layers ideally bonded to large substrates are considered. Cracksemerging from an almost flat surface and propagating through the bi-materials are studied.The cracks acquire realistic geometrical shapes, where the tips are integral parts of the cracksurfaces. Crack propagation is related to surface evolution resulting from material loss due tocorrosion. Controlling mechanism for the evolution is the rupture of a brittle passive film,which is frequently building-up along the surface. The evolution rate is a function of thedegree of film damage caused by the surface straining. The model leads to a moving boundaryformulation, for which a numerical solution is used. The mismatch of the material plasticproperties is... (More)
- Bi-materials composed of thin layers ideally bonded to large substrates are considered. Cracksemerging from an almost flat surface and propagating through the bi-materials are studied.The cracks acquire realistic geometrical shapes, where the tips are integral parts of the cracksurfaces. Crack propagation is related to surface evolution resulting from material loss due tocorrosion. Controlling mechanism for the evolution is the rupture of a brittle passive film,which is frequently building-up along the surface. The evolution rate is a function of thedegree of film damage caused by the surface straining. The model leads to a moving boundaryformulation, for which a numerical solution is used. The mismatch of the material plasticproperties is being varied in the study. The results show how cracks pass the interface. Thegrowth rate variation close to the interface is studied. Typical surface evolution for a crackpassing through a soft-hard material interface is presented. The resulting crack morphology ofthe model resembles what has been observed in reality. It is shown how the results can beused in designing bi-material systems to inhibit corrosion crack growth. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/56822244-2aa9-4f2f-8462-796570fcbf51
- author
- Jivkov, A.P. LU and Ståhle, Per LU
- publishing date
- 2003
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Proceedings from the 9th International Conference on the Mechanical Behaviour of Materials, ICM9
- conference name
- ICM9 - 9th International Conference on the Mechanical Behavior of Materials
- conference location
- Geneva, Switzerland
- conference dates
- 2003-05-25 - 2003-05-29
- language
- English
- LU publication?
- no
- id
- 56822244-2aa9-4f2f-8462-796570fcbf51
- date added to LUP
- 2019-06-25 18:23:16
- date last changed
- 2020-02-13 14:27:39
@inproceedings{56822244-2aa9-4f2f-8462-796570fcbf51,
abstract = {{Bi-materials composed of thin layers ideally bonded to large substrates are considered. Cracks emerging from an almost flat surface and propagating through the bi-materials are studied. The cracks acquire realistic geometrical shapes, where the tips are integral parts of the crack surfaces. Crack propagation is related to surface evolution resulting from material loss due to corrosion. Controlling mechanism for the evolution is the rupture of a brittle passive film, which is frequently building-up along the surface. The evolution rate is a function of the degree of film damage caused by the surface straining. The model leads to a moving boundary formulation, for which a numerical solution is used. The mismatch of the material plastic properties is being varied in the study. The results show how cracks pass the interface. The growth rate variation close to the interface is studied. Typical surface evolution for a crack passing through a soft-hard material interface is presented. The resulting crack morphology of the model resembles what has been observed in reality. It is shown how the results can be used in designing bi-material systems to inhibit corrosion crack growth.}},
author = {{Jivkov, A.P. and Ståhle, Per}},
booktitle = {{Proceedings from the 9th International Conference on the Mechanical Behaviour of Materials, ICM9}},
language = {{eng}},
title = {{Corrosion crack growth in a bi-material system}},
year = {{2003}},
}