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MICROSTRUCTURAL AND ENVIRONMENTAL EFFECTS ON FATIGUE CRACK PROPAGATION IN DUPLEX STAINLESS STEELS
Author(s) -
MARROW T. J.,
KING J. E.
Publication year - 1994
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1994.tb00807.x
Subject(s) - materials science , corrosion fatigue , ferrite (magnet) , microstructure , metallurgy , duplex (building) , cleavage (geology) , crack closure , grain boundary , inert , fracture mechanics , austenite , paris' law , transgranular fracture , corrosion , composite material , fracture (geology) , intergranular fracture , dna , physics , quantum mechanics , biology , genetics
— Fatigue crack initiation and propagation in duplex stainless steels are strongly affected by microstructure in both inert and aggressive environments. Fatigue crack growth rates in wrought Zeron 100 duplex stainless steel in air were found to vary with orientation depending on the frequency of crack tip retardation at ferrite/austenite grain boundaries. Fatigue crack propagation rates in 3.5% NaCl solution and high purity water are increased by hydrogen assisted transgranular cyclic cleavage of the ferrite. The corrosion fatigue results are interpreted using a model for the cyclic cleavage mechanism.