| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7893761 | Corrosion Science | 2018 | 12 Pages |
Abstract
Correlation of microstructure and stress corrosion cracking (SCC) initiation behaviour of the fusion boundary (FB) region in a SA508 Cl. 3-Alloy 52M weld joint in primary pressurized water reactor environment was investigated. Cr-depletion at the grain boundary and strength mismatch in the FB region are the two causes for SCC initiation in the FB region. The partially mixed zone between the dilution zone (DZ) of Alloy 52M and SA508 Cl. 3 has a retardation effect on SCC initiation. This is attributed to the decrease of strength mismatch and the alleviation of strain concentration adjacent to the grain boundary in DZ.
Keywords
CSLPWHTPWRB. SEMGTAWPmzKAMSSRTEBSDLASEDXSCCA. Low Alloy SteelA. NickelC. WeldingC. Stress corrosionRgbLABPost weld heat treatmentenergy dispersive x-rayHazdissolved oxygenTemB. TEMGas tungsten arc weldingheat affected zoneStress corrosion crackingPressurized Water ReactorFinite element methodelectron backscatter diffractionCoincidence site latticeLow alloy steelSEMscanning electron microscopeTransmission electron microscopeOptical microscopeDissolved hydrogenFEMKernel average misorientation
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Lijin Dong, Qunjia Peng, He Xue, En-Hou Han, Wei Ke, Lei Wang,