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THE BEHAVIOUR OF FATIGUE CRACK GROWTH IN THE FRETTING‐CORROSION‐FATIGUE OF HIGH TENSILE ROPING STEEL IN AIR AND SEAWATER
Author(s) -
Takeuchi M.,
Waterhouse R. B.,
Mutoh Y.,
Satoh T.
Publication year - 1991
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.1460-2695.1991.tb00643.x
Subject(s) - fretting , seawater , materials science , metallurgy , cathodic protection , ultimate tensile strength , corrosion fatigue , artificial seawater , fatigue limit , composite material , corrosion , electrochemistry , electrode , geology , oceanography , chemistry
Abstract— Fretting fatigue tests of high tensile roping steel, 1.5 mm in diameter, 1770 MPa grade, were carried out in air and seawater. S‐N curves were completed in both the environments and under cathodic protection at‐850 mV (SCE). The crack growth curves were determined at three different alternating stress levels. The coefficients of friction between the specimen and the fretting bridge, where the macro‐slip occurred, were found to be 0.63 in air and 0.38 in seawater. The prediction of the fretting fatigue lives were made according to the Tanaka—Mutoh model, where the frictional force was taken into consideration. The predicted fatigue life agreed well with the experimental results in air but in seawater the prediction defined a much higher fatigue limit compared with the experimental results which showed the absence of the fatigue limit. These results indicate that the method of removing the electrochemical component is very promising for the prevention of fretting fatigue failure in seawater.