Development of prediction model for stress corrosion cracking probability in scratched alloy 690TT heat transfer tubes

descriptionPublicationkeyboard_double_arrow_right Article 01 Sep 2025 English Publisher:Elsevier BVJournal:Corrosion Communications, volume 19, pages 1-13 (issn: 2667-2669,

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Authors: Rongbo Li; Bin Wu; Fanjiang Meng; Haitao Wang; Dongcen Hou; Hongliang Ming; Jianqiu Wang; +1 Authors

doi: 10.1016/j.corcom.2024.05.001

Development of prediction model for stress corrosion cracking probability in scratched alloy 690TT heat transfer tubes

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Abstract

This study investigated stress corrosion cracking (SCC) behavior of scratched areas across various depths and stress on alloy 690TT, through precise loading (252 samples in total) and SCC tests. Resultsindicate that SCC mainly initiates at the side walls of the scratch grooves rather than the bottom (sustains the highest stress level), given the low applied load stress about 13% of that at the bottom. Scratch depth is a more significant factor to SCC initiation in scratch groove than loading stress. A probabilistic model was established to predict SCC initiation induced by scratches of varyingdepths.

Related Organizations

Institute of Metals Research
China (People's Republic of)
Chinese Academy of Sciences
China (People's Republic of)
Wuhan Engineering Science & Technology Institute
China (People's Republic of)
Fudan University
China (People's Republic of)

Keywords

Prediction model, TA401-492, Alloy 690TT, Scratch, Stress corrosion cracking, High temperature pressurized water, Materials of engineering and construction. Mechanics of materials

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