摘要
In this study,the relationship between spinodal decomposition and the formation of Ni-rich clusters and G-phase in the ferrite on hardening and pitting corrosion of two thermally aged duplex stainless steels(DSSs)at 475℃was investigated.Results indicate that,for 2205 DSS,pitting corrosion behavior is influenced by the presence and size of G-phase precipitates for longer aging times,but this contribution is masked by the advanced stage of spinodal decomposition in the ferritic structure.On the other hand,for 2101 DSS,the formation of Cr-richer nitrides impairs pitting corrosion resistance more than spinodal decomposition.
基金
PPGCEM/UFSCar(Materials Science and Engineering Postgraduate Program at the Federal University of São Carlos)
CNPq(National Council for Scientific and Technological Development,Brazil-grant no.311163/2017-3 and 312614/2020-9)
FAPESP(São Paulo Research Foundation,Brazil–grant no.2020/03205-6)
