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51318-11522-Intergranular Stress Corrosion Crack Initiation and Temperature Dependence of Alloy 600 in Pressurized Water Reactor Primary Water

Stress corrosion crack initiation of a solution annealed, cold-worked UNS N06600 (Alloy 600) was investigated in 360 & 325ºC simulated PWR primary water using constant load tensile instrumented for in-situ detection by the direct current potential drop technique.

Product Number: 51318-11522-SG
Author: Ziqing Zhai, Mychailo Toloczko, Daniel Schreiber, Stephen Bruemmer
Publication Date: 218
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Stress corrosion crack (SCC) initiation of a solution annealed, cold-worked (CW) UNS N06600 (Alloy 600) material was investigated in 360 and 325ºC simulated PWR primary water using constant load tensile instrumented for in-situ detection by the direct current potential drop technique. This CW material with high boron and low carbon bulk concentrations was found to be highly susceptible to SCC. Consistent SCC initiation times were obtained at both temperatures and the thermal activation energy for SCC initiation is estimated at ~116 kJ/mol.

Key words: intergranular stress corrosion cracking, crack initiation, UNS N06600 (alloy 600), thermal activation energy

Stress corrosion crack (SCC) initiation of a solution annealed, cold-worked (CW) UNS N06600 (Alloy 600) material was investigated in 360 and 325ºC simulated PWR primary water using constant load tensile instrumented for in-situ detection by the direct current potential drop technique. This CW material with high boron and low carbon bulk concentrations was found to be highly susceptible to SCC. Consistent SCC initiation times were obtained at both temperatures and the thermal activation energy for SCC initiation is estimated at ~116 kJ/mol.

Key words: intergranular stress corrosion cracking, crack initiation, UNS N06600 (alloy 600), thermal activation energy

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