Effects of Cr and Nb contents on the susceptibility of Alloy 600 type Ni-base alloys to stress-corrosion cracking in a simulated BWR environment
- Ishikawajima-Harima Heavy Industries Co., Ltd., Tokyo (Japan). Research Inst.
In order to discuss the effects of chromium and niobium contents on the susceptibility of Alloy 600 type nickel-base alloys to stress-corrosion cracking in the BWR primary coolant environment, a series of creviced bent-beam (CBB) tests were conducted in a high-temperature, high-purity water environment. Chromium, niobium, and titanium as alloying elements improved the resistivity to stress-corrosion cracking, whereas carbon enhanced the susceptibility to it. Alloy-chemistry-based correlations have been defined to predict the relative resistances of alloys to stress-corrosion cracking. A strong correlation was found, for several heats of alloys, between grain-boundary chromium depletion and the susceptibility to stress-corrosion cracking.
- OSTI ID:
- 99551
- Report Number(s):
- CONF-950304--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
BWR TYPE REACTORS
CHROMIUM
CORROSION RESISTANCE
CRACK PROPAGATION
EXPERIMENTAL DATA
FILLER METALS
INCONEL 600
MECHANICAL TESTS
METALLURGICAL EFFECTS
NICKEL BASE ALLOYS
NIOBIUM
PRIMARY COOLANT CIRCUITS
REACTOR MATERIALS
STRESS CORROSION
TITANIUM