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Detection and characterisation of intergranular stress-corrosion cracking on austenitic stainless steel / J. Kovac in Materials and corrosion, Vol. 63 N° 8 (Août 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 664–673 Titre : Detection and characterisation of intergranular stress-corrosion cracking on austenitic stainless steel Type de document : texte imprimé Auteurs : J. Kovac, Auteur ; T. J. Marrow, Auteur ; E. Govekar, Auteur Année de publication : 2013 Article en page(s) : pp. 664–673 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Acoustic  emission;  austenitic  stainless  steel;  digital  image  correlation;  electrochemical  noise;  stress-corrosion  cracking Résumé : Intergranular stress-corrosion cracking (IGSCC) on a sensitised type AISI 304 stainless steel specimen was monitored simultaneously by acoustic emission, electrochemical noise, elongation measurements and a digital imaging system. The specimen was exposed to an aqueous sodium thiosulphate solution in combination with a constant load. It was established that before the final fracture two large cracks and numerous smaller cracks had developed. Detection and characterisation of the stress-corrosion processes which generated these cracks are discussed. The results confirm and generalise previously established correlations between various parameters obtained by the implemented characterisation methods and IGSCC processes. Additionally, a clear differentiation between crack related and crack non-related AE signals was made based on an analysis of the AE signals. The relationship between the crack lengths calculated by means of digital image correlation analysis and the electrochemical current noise was also established. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106182/abstract [article] Detection and characterisation of intergranular stress-corrosion cracking on austenitic stainless steel [texte imprimé] / J. Kovac, Auteur ; T. J. Marrow, Auteur ; E. Govekar, Auteur . - 2013 . - pp. 664–673. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 664–673 Mots-clés : Acoustic  emission;  austenitic  stainless  steel;  digital  image  correlation;  electrochemical  noise;  stress-corrosion  cracking Résumé : Intergranular stress-corrosion cracking (IGSCC) on a sensitised type AISI 304 stainless steel specimen was monitored simultaneously by acoustic emission, electrochemical noise, elongation measurements and a digital imaging system. The specimen was exposed to an aqueous sodium thiosulphate solution in combination with a constant load. It was established that before the final fracture two large cracks and numerous smaller cracks had developed. Detection and characterisation of the stress-corrosion processes which generated these cracks are discussed. The results confirm and generalise previously established correlations between various parameters obtained by the implemented characterisation methods and IGSCC processes. Additionally, a clear differentiation between crack related and crack non-related AE signals was made based on an analysis of the AE signals. The relationship between the crack lengths calculated by means of digital image correlation analysis and the electrochemical current noise was also established. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106182/abstract