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Early detection of hydrogen-induced stress corrosion cracking using micromagnetic test methods

: Lang, M.A.; Altpeter, I.; Dobmann, G.

Bartos, A.L.; Green, R.E.; Ruud, C.:
Nondestructive characterization of materials VII. Pt.1
Zürich: Trans Tech Publications, 1996
ISBN: 0-87849-729-3
International Symposium on Nondestructive Characterization of Materials <7, 1995, Prag>
Conference Paper
Fraunhofer IZFP ()
Barkhausen noise; Barkhausen-Rauschen; distorsion factor; ferritic steel; ferritischer Stahl; hydrogen-induced stress corrosion; micromagnetic method; micromagnetic testing; microstructure; mikromagnetische Prüfung; mikromagnetische Technik; Mikrostruktur

In ferritic steels, especially those of higher tensile strength, Hydrogen-Induced Stress Corrosion Cracking (HISCC) can lead to sudden component failure and is thus a safety risk. The interaction of the steel with the diffusing hydrogen leads to changes in the material's properties that can be detected with micromagnetic testing methods. The experiments and measurements described where carried out on tube specimens with martensitic microstructure (steel grade X 20 Cr 13) in order to generally evaluate the potential of micromagnetic testing methods for the early recognition of HISCC