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ENVIRONMENTAL EFFECTS ON FATIGUE FRACTURE MODE TRANSITIONS OBSERVED IN ALUMINIUM ALLOYS
Author(s) -
VOGELESANG L. B.,
SCHIJVE J.
Publication year - 1980
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.1460-2695.1980.tb01106.x
Subject(s) - materials science , cracking , aluminium , crack closure , fatigue cracking , metallurgy , inert , corrosion fatigue , mode (computer interface) , stress corrosion cracking , composite material , ultimate tensile strength , fracture mechanics , stress concentration , paris' law , shear (geology) , structural engineering , corrosion , engineering , physics , quantum mechanics , computer science , operating system
— Fatigue crack propagation tests were carried out in different environments on 7075–T6 and 2024–T3 centre‐cracked sheet specimens. Observations were made on the macroscopic transition from tensile mode to shear mode. The transition is suppressed by an aggressive environment, whereas it is promoted by an inert environment. As a consequence there is no unique correlation between the state of stress and the mode of cracking. Both the state of stress and the environment have a significant effect on the mode of cracking. A simple model for the effect of environment on fatigue crack growth is presented. The implications for crack growth under corrosion fatigue conditions are discussed.