Near-threshold corrosion fatigue crack growth behavior

Judith Todd Copley, Lichun Chen, Evgueni Y. Yankov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish (US)
Title of host publicationFirst International Conference on Microstructures and Mechanical Properties of Aging Materials
EditorsP.K. Liaw, R. Viswanathan, K.L. Murty, E.P. Simonen, D. Frear
PublisherPubl by Minerals, Metals & Materials Soc (TMS)
Pages327-341
Number of pages15
ISBN (Print)0873392078
StatePublished - Dec 1 1993
EventFirst International Conference on Microstructures and Mechanical Properties of Aging Materials - Chicago, IL, USA
Duration: Nov 2 1992Nov 5 1992

Publication series

NameFirst International Conference on Microstructures and Mechanical Properties of Aging Materials

Other

OtherFirst International Conference on Microstructures and Mechanical Properties of Aging Materials
CityChicago, IL, USA
Period11/2/9211/5/92

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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