Contribution of acoustic emission to the understanding of sulfide stress cracking of low alloy steels
Résumé
The acoustic emission technique was applied to standard tests devoted to evaluate sulfide stress cracking susceptibility of steels for oil and gas industry. The mapping of the density of AE signals vs. their location on the specimen gauge length as a function of time allowed early detection of cracking, and gave meaningful information on incubation times and propagation rates. Sulfide stress cracking initiation was correlated with the presence of critical surface defects. A mechanism involving plastic strain and/or metal dissolution was proposed to account for crack propagation. © 2011 Elsevier Ltd.
Mots clés
Surface defects
Propagation rate
Standard tests
Sulfide stress cracking
Acoustic emission testing
Acoustic emissions
Cerium alloys
Dissolution
Gas industry
Hydrogen
Hydrogen embrittlement
Oil and Gas Industry
Metal dissolution
Low alloy steels
Incubation time
Gauge length
Function of time
Early detection
Critical surfaces
AE signals
Acoustic emission techniques
Domaines
Matériaux
Origine : Fichiers produits par l'(les) auteur(s)
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