Corrosion fatigue crack growth in clad low-alloy steels. Part 1: Medium sulfur forging steel

Journal Article · Fri Aug 01 04:00:00 EDT 1997 · Journal of Pressure Vessel Technology

DOI:https://doi.org/10.1115/1.2842301· OSTI ID:527596

James, L A; Poskie, T J ^[1]; Auten, T A ^[2]; Cullen, W H ^[3]

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1. Westinghouse Electric Corp., West Mifflin, PA (United States). Bettis Atomic Power Lab.
2. Knolls Atomic Power Lab., Schenectady, NY (United States)
3. Materials Engineering Associates, Lanham, MD (United States)

Corrosion fatigue crack propagation tests were conducted on a medium-sulfur ASTM A508-2 forging steel overlaid with weld-deposited alloy EN82H cladding. The specimens featured semi-elliptical surface cracks penetrating approximately 6.3 mm of cladding into the underlying steel. The initial crack sizes were relatively large with surface lengths of 30.3--38.3 mm, and depths of 13.1--16.8 mm. The experiments were conducted in a quasi-stagnant low-oxygen (O{sub 2} < 10 ppb) aqueous environment at 243 C, under loading conditions ({Delta}K, R, and cyclic frequency) conducive to environmentally assisted cracking (EAC) in higher-sulfur steels under quasi-stagnant conditions. Earlier experiments on unclad compact tension specimens of this heat of steel did not exhibit EAC, and the present experiments on semi-elliptical surface cracks penetrating cladding also did not exhibit EAC.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC11-93PN38195
• OSTI ID: 527596
• Journal Information: Journal of Pressure Vessel Technology, Journal Name: Journal of Pressure Vessel Technology Journal Issue: 3 Vol. 119; ISSN JPVTAS; ISSN 0094-9930
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CORROSION FATIGUE
CORROSION RESISTANT ALLOYS
CRACK PROPAGATION
EXPERIMENTAL DATA
FILLER METALS
NICKEL BASE ALLOYS
PROTECTIVE COATINGS
STEEL-ASTM-A508