| Issue |
Rev. Met. Paris
Volume 99, Number 5, May 2002
Science et Génie des MatériauxFatigue et environnement |
|
|---|---|---|
| Page(s) | 449 - 465 | |
| DOI | https://doi.org/10.1051/metal:2002164 | |
| Published online | 25 October 2002 | |
Influence of a gaseous atmosphere on fatigue crack propagation
The paper presents a review of the current knowledge on the influence of gaseous atmospheres, and primarily ambient air, on fatigue crack propagation in metallic alloys. Experimental evidence of the effect of exposure to ambient air or any moist environment on fatigue crack propagation in steels is first proposed. The different interacting processes are analyzed so as to clearly uncouple the influence of the various factors on crack growth resistance. Two distinct mechanisms are identified : the adsorption of vapour molecules and hydrogen assisted fracture at crack tip.
© La Revue de Métallurgie, 2002
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