TY - GEN
T1 - Near-threshold corrosion fatigue crack growth behavior
AU - Todd Copley, Judith
AU - Chen, Lichun
AU - Yankov, Evgueni Y.
PY - 1993/12/1
Y1 - 1993/12/1
N2 - Near-threshold corrosion fatigue crack propagation studies have been conducted on Mil S-24645 HSLA steel, a compatible weld metal and its heat affected zone in air, ASTM seawater at the free corrosion potential, and ASTM seawater with -0.8 V and -1.0 V (SCE) cathodic protection, using frequencies of 10, 2, and 0.2 Hz with a stress ratio, R = 0.1. The weldments exhibited slower crack growth rates and higher threshold stress intensity ranges in both air and ASTM seawater than the base metal. With the exception of the weld metal tested in air, after correction for crack closure, all the effective threshold stress intensity ranges were reduced to the range 3.5 to 5.5 MPa m1/2. The crack closure contributions to the threshold stress intensity ranges and near-threshold crack propagation rates are discussed.
AB - Near-threshold corrosion fatigue crack propagation studies have been conducted on Mil S-24645 HSLA steel, a compatible weld metal and its heat affected zone in air, ASTM seawater at the free corrosion potential, and ASTM seawater with -0.8 V and -1.0 V (SCE) cathodic protection, using frequencies of 10, 2, and 0.2 Hz with a stress ratio, R = 0.1. The weldments exhibited slower crack growth rates and higher threshold stress intensity ranges in both air and ASTM seawater than the base metal. With the exception of the weld metal tested in air, after correction for crack closure, all the effective threshold stress intensity ranges were reduced to the range 3.5 to 5.5 MPa m1/2. The crack closure contributions to the threshold stress intensity ranges and near-threshold crack propagation rates are discussed.
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M3 - Conference contribution
AN - SCOPUS:0027875713
SN - 0873392078
T3 - First International Conference on Microstructures and Mechanical Properties of Aging Materials
SP - 327
EP - 341
BT - First International Conference on Microstructures and Mechanical Properties of Aging Materials
A2 - Liaw, P.K.
A2 - Viswanathan, R.
A2 - Murty, K.L.
A2 - Simonen, E.P.
A2 - Frear, D.
PB - Publ by Minerals, Metals & Materials Soc (TMS)
T2 - First International Conference on Microstructures and Mechanical Properties of Aging Materials
Y2 - 2 November 1992 through 5 November 1992
ER -