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EFFECT OF MIXED‐MODE OVERLOADS ON ENVIRONMENTAL‐HYDROGEN‐INDUCED FRACTURE
Author(s) -
Gao H.,
Yang X.,
Cao W.,
De los Rios E. R.
Publication year - 1997
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.1460-2695.1997.tb01491.x
Subject(s) - materials science , composite material , hydrogen , structural engineering , plasticity , fracture mechanics , residual stress , crack closure , mixed mode , dislocation , metallurgy , chemistry , engineering , organic chemistry
— The effect of short periods of mixed‐mode overloading on the environmental hydrogen induced fracture life of 0.42%C, 0.87%Cr, 0.21%Mo steel has been studied. Tests were performed in 0.5 mol/L H 2 SO 4 solution under continuous hydrogen charging conditions using a weight loading system. Experimental results show that the application of mixed‐mode overloads can cause more severe crack growth retardation than those of mode I. Possible mechanisms responsible for the retardation of subsequent crack growth, such as crack deflection, plasticity‐induced residual compression stresses, dislocation shielding and overload damage, are examined.