An ultrasonically induced cavitation facility was used to study the effect of a cast duplex stainless steel (DSS) microstructure on its corrosion behavior in seawater. Under cavitation conditions, small cavities initiated in the ferritic matrix and at the ferrite-austenite boundaries. With the progress of cavitation, the attack concentrated in the austenitic phase and then spread to the ferritic phase and was associated with cleavage-like facets, ductile tearing, river patterns and crystallographic steps at later stages. Cross-sections of specimens revealed microcracks initiating from the ferritic matrix at the bottom of cavities. Crack propagation into the matrix was impeded by the austenitic islands.


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    Title :

    The effect of duplex stainless steel microstructure on its cavitation morphology in seawater


    Additional title:

    Der Einfluß des Mikrogefüges von Duplexstahl auf seine Kavitationsmorphologie in Seewasser


    Contributors:
    Al-Hashem, A. (author) / Riad, W. (author)

    Published in:

    Materials Characterization ; 47 , 5 ; 389-395


    Publication date :

    2001


    Size :

    7 Seiten, 13 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






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