Stress corrosion cracking of Alloys 600 and 182 in BWR environments
- ABB Atom AB, Vaesteraas (Sweden)
Wrought Alloy 600 and weldments of Alloy 182 are being tested for initiation and propagation of intergranular stress corrosion cracking (IGSCC). Crack initiation is tested on compact tension (CT) specimens with U-notches of various radii under enhanced crevice conditions, in a test loop in a Swedish BWR. After one year exposure there was initiation of IGSCC in a large portion of the Alloy 182 specimens, but nearly no initiation in Alloy 600. Crack propagation was measured in a laboratory loop on CT specimens under constant or cyclic load. Low carbon Alloy 600, or Alloy 182 high in titanium and niobium versus carbon, cracked at lower rates than material with high carbon activity. Materials with low concentrations of phosphorus and sulfur cracked slower than those high in these elements in clean environment, but no such effect was found in environment with sulfate. Alloy 182 weld metal generally cracked at higher rates than Alloy 600.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (United States); ABB Atom AB, Vaesteraas (Sweden)
- Sponsoring Organization:
- EPRI; Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 5041079
- Report Number(s):
- EPRI-TR-100658
- Country of Publication:
- United States
- Language:
- English
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Crack propagation in Alloys 600 and 182 in simulated BWR environment
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36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
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ALLOY-NI76CR15FE8
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
AUSTENITIC STEELS
BWR TYPE REACTORS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
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ENRICHED URANIUM REACTORS
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HIGH ALLOY STEELS
INCONEL 600
INCONEL ALLOYS
INTERGRANULAR CORROSION
IRON ALLOYS
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NICKEL ALLOYS
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REACTOR COMPONENTS
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WATER MODERATED REACTORS
WELDED JOINTS