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Corrosion‐fatigue behaviour of Cr–Mo steel under biaxial tension
Author(s) -
Gaur Vidit,
Doquet Véronique,
Persent Emmanuel,
Roguet Eléonore
Publication year - 2020
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/ffe.13276
Subject(s) - materials science , cathodic protection , corrosion fatigue , hydrogen embrittlement , tension (geology) , embrittlement , corrosion , intergranular corrosion , metallurgy , cyclic stress , composite material , fracture (geology) , electrochemistry , ultimate tensile strength , chemistry , electrode
Combined cyclic tension and internal pressure tests with various proportions of each loading were run on a 2.5%Cr–1%Mo steel in air and in 3.5% NaCl solution, with and without cathodic protection to investigate the effect of positive stress biaxiality on corrosion‐fatigue lives and damage mechanisms. At free potential, a strong reduction in fatigue resistance was observed for uniaxial as well as for equibiaxial cyclic tension and attributed to multiple crack initiation from corrosion pits. Cathodic protection completely cancelled the detrimental effect of the corrosive environment on fatigue lives whatever the load biaxiality was, in spite of an obvious enhancement of intergranular fracture attributed to hydrogen embrittlement.