Title: Influence of microstructural morphology on pitting corrosion resistance of duplex stainless steel weld metals
Abstract: The formation mechanism of microstructure of duplex stainless steel weld metals with different N content and heat input and the effects of microstructural factors on pitting corrosion resistance of them were investigated. As N content of weld metal increased, ferrite content decreased and Cr nitride content increased. However, once N content exceeded a certain value, Cr nitride content decreased. As the ferrite content of the weld metal decreased, the critical pitting temperature (CPT) increased, and as N content increased, CPT increased. Thus, the pitting corrosion resistance of duplex stainless steel weld metals must be affected by both of N content and Cr nitride, and the precipitation of Cr nitride must also be affected by N content and the ferrite content due to N content and the weld heat input. The results indicated that these microstructural factors were an important index to evaluate the pitting corrosion resistance of duplex stainless steel weld metals.
Publication Year: 2020
Publication Date: 2020-06-02
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 2
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