Considerations for metallographic observation of intergranular attack in Alloy 600 steam generator tubes

This technical note provides some considerations for the metallographic observation of intergranular attack (IGA) in Alloy 600 steam generator tubes. The IGA region was crazed along the grain boundaries through a deformation by an applied stress. The direction and extent of the crazing depended on t...

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Bibliographic Details
Published inNuclear engineering and technology Vol. 47; no. 7; pp. 934 - 938
Main Authors Hur, Do Haeng, Choi, Myung Sik, Lee, Deok Hyun, Han, Jung Ho
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2015
Elsevier
한국원자력학회
Subjects
Crazing
Deformation
Intergranular attack
Steam generator tube
Stress corrosion crack
원자력공학
Crazing
Deformation
Stress corrosion crack
Intergranular attack
Steam generator tube
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Summary:This technical note provides some considerations for the metallographic observation of intergranular attack (IGA) in Alloy 600 steam generator tubes. The IGA region was crazed along the grain boundaries through a deformation by an applied stress. The direction and extent of the crazing depended on those of the applied stress. It was found that an IGA defect can be misevaluated as a stress corrosion crack. Therefore, special caution should be taken during the destructive examination of the pulled-out tubes from operating steam generators.
Bibliography:G704-000135.2015.47.7.005
ISSN:1738-5733
2234-358X
DOI:10.1016/j.net.2015.09.003