Stress corrosion crack (SCC) initiation of three mill-annealed (MA) alloy 600 heats in simulated pressurized water reactor primary water has been investigated using constant load tests equipped with in-situ direct current potential drop (DCPD) measurement capabilities. SCC initiation times were greatly reduced by a small amount of cold work. Shallow intergranular (IG) attack and/or cracks were found on most high-energy grain boundaries intersecting the surface with only a small fraction evolving into larger cracks and IGSCC growth. Crack depth profiles were measured and related to DCPD-detected initiation response. Processes controlling the SCC initiation in MA alloy 600 are discussed. IN PRESS, CORRECTED PROOF, 05/02/2017 - mfl
Revised: February 28, 2020 |
Published: April 27, 2017
Citation
Zhai Z., M.B. Toloczko, M.J. Olszta, and S.M. Bruemmer. 2017.Stress Corrosion Crack Initiation of Alloy 600 in PWR Primary Water.Corrosion Science 123.PNNL-SA-123949.doi:10.1016/j.corsci.2017.04.013