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FATIGUE BEHAVIOR OF A RAIL STEEL
Author(s) -
Scutti J. J.,
Pelloux R. M.,
FuquenMoleno R.
Publication year - 1984
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.1460-2695.1984.tb00410.x
Subject(s) - materials science , eutectic system , paris' law , crack closure , metallurgy , cyclic stress , fracture (geology) , low cycle fatigue , carbon steel , stress (linguistics) , stress concentration , composite material , fracture mechanics , microstructure , corrosion , linguistics , philosophy
The fatigue behavior of a hot‐rolled, control‐cooled, plain carbon eutectoid rail steel has been characterized. The data include monotonic and cyclic stress‐strain curves, low cycle fatigue data and near‐threshold fatigue crack growth rate behavior in air and in vacuo. The effects of environment and mean stress on the near‐threshold fatigue crack growth rates of rail steel are significant. At a low stress ratio ( R ), Δ K o is lower in vacuum (7 MPa √m) than in moist air (10 MPa √m). At high R , Δ K o is higher in vacuum (6 MPa √m) than in air (4 MPa √m). The beneficial effect of moist air on FCGR at low Δ K and low R is attributed to an increase in closure due to fracture surface roughness and oxide film.