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Effect of sigma phase on the low cycle fatigue property of Z3CN20.09M cast duplex stainless steel in high temperature water
Author(s) -
Wu H. C.,
Yang B.,
Wang Y.Q.
Publication year - 2015
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201407721
Subject(s) - materials science , low cycle fatigue , duplex (building) , metallurgy , scanning electron microscope , ferrite (magnet) , cracking , corrosion fatigue , sigma , pitting corrosion , fatigue testing , corrosion , composite material , chemistry , physics , dna , biochemistry , quantum mechanics
The effect of sigma phase on the low cycle fatigue (LCF) property of Z3CN20.09M cast duplex stainless steel (DSS) was investigated by corrosion fatigue cracking test system and scanning electron microscopy (SEM). The results showed that the fatigue lives of the aged Z3CN20.09M DSS specimens decreased with the increase of aging time. The Cr‐depleted zones around the sigma phase are sensitive to pitting and preferential to forming fatigue cracks. Moreover, the precipitation of sigma phase was also found to degrade markedly the fatigue property of the DSS as it leads to fracture of ferrite during fatigue tests.