Relating General and Phase Specific Corrosion in a Super Duplex Stainless Steel with Phase Specific Microstructure Evolution

Controlled near plane strain deformation was imposed on a super duplex stainless steel. Subsequent characterization involved extensive microtexture measurements, and measurements of general corrosion and corrosion behavior (and nature of the passive film) of the individual phases. The general corros...

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Bibliographic Details
Published in:Corrosion (Houston, Tex.) Tex.), 2019-11, Vol.75 (11), p.1315-1326
Main Authors: Mondal, Riya, Bonagani, Sunil Kumar, Lodh, A., Sharma, Tenneti, Sivaprasad, P.V., Chai, G., Kain, Vivekanand, Samajdar, I.
Format: Article
Language:English
Subjects:
Austenite
Boundaries
Corrosion
Corrosion prevention
Corrosion resistance
Corrosion resistant steels
Deformation
Duplex stainless steels
Edge dislocations
Electrodes
Electrolytes
Laboratories
Microstructure
Microtexture
Plane strain
Shear bands
Slip resistance
Stainless steel
True strain
Uniform attack (corrosion)
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Summary:Controlled near plane strain deformation was imposed on a super duplex stainless steel. Subsequent characterization involved extensive microtexture measurements, and measurements of general corrosion and corrosion behavior (and nature of the passive film) of the individual phases. The general corrosion was controlled by the corrosion performance of the austenite phase, and corresponding microtextural developments. Corrosion resistance in the austenite phase, as well as the general corrosion, improved until a true strain of 0.26 and then dropped. Enhanced corrosion resistance coincided with slip band formation and generation of low-angle boundaries. Beyond a strain of 0.26, shear bands and associated lattice curvatures plus high-angle boundaries led to a clear degradation in the corrosion behavior.
ISSN:0010-9312
1938-159X
DOI:10.5006/3091