The effect of temperature and cyclic frequency upon fatigue crack growth behavior of several steels in an elevated temperature aqueous environment

Journal Article · Sun May 01 04:00:00 EDT 1994 · Journal of Pressure Vessel Technology; (United States)

DOI:https://doi.org/10.1115/1.2929565· OSTI ID:7167972

James, L A ^[1]

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1. Westinghouse Electric Corp., West Mifflin, PA (United States)

The fatigue crack propagation (FCP) behavior of several ASTM A302-B and A508-2 steels was characterized in deaerated elevated temperature aqueous environment. FCP behavior was determined over the range 121 C to 343 C at a constant value of [Delta]K, stress ratio, and load rise time. A complex response of FCP rates as a function of temperature was observed, and this is discussed in the light of similar results developed by others within the nuclear industry. Corrosion potentials (referenced to the standard hydrogen electrode) were measured for each of the steels over the above temperature range and comparisons are made to the observed FCP behavior. Cyclic frequency effects were studied at two temperatures, 149 C and 243 C, and these are analyzed within the time domain'' format first suggested by Shoji et al. The results, when expressed in the time domain format, clearly show regions where environmentally assisted cracking (EAC) occurs, and regions where EAC does not occur. A threshold'' for EAC was noted at 149 C, and the possibility of an EAC threshold was observed at 243 C.

• DOE Contract Number: AC11-89PN38014
• OSTI ID: 7167972
• Journal Information: Journal of Pressure Vessel Technology; (United States), Journal Name: Journal of Pressure Vessel Technology; (United States) Vol. 116:2; ISSN JPVTAS; ISSN 0094-9930
• Country of Publication: United States
• Language: English

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