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A METHOD TO MEASURE ELECTROCHEMICAL POTENTIAL AT THE TIP OF A GROWING CRACK DURING AN ENVIRONMENTAL FATIGUE TEST
Author(s) -
GABETTA G.
Publication year - 1982
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.1460-2695.1982.tb01248.x
Subject(s) - passivation , materials science , electrochemistry , composite material , crack closure , measure (data warehouse) , tension (geology) , oxide , surface tension , electrochemical potential , layer (electronics) , metallurgy , fracture mechanics , electrode , chemistry , thermodynamics , computer science , physics , database , ultimate tensile strength
— Electrochemical potential at the tip of a fatigue crack was measured in a compact tension specimen, situated in demineralized, oxygen saturated water at 93°C. Results show that the crack tip region is active with respect to the external specimen surface. Passivation occurs on the crack surfaces by the formation of an oxide layer. The oxygen concentration inside the crack is likely to be lower than in the bulk solution.