Stress corrosion cracking (SCC) is a failure mode determining the safety of dissimilar metal welded joints in nuclear power plants. It is also of great importance to establish an SCC crack propagation life prediction model for the safety of welded joints of practical engineering significance in nuclear power structural safety assessment. The creep constitutive mechanism of 304 stainless steel at 288°C was obtained in the autoclave creep experiment, and the finite element calculation method of SCC based on creep was set up. The creep field around the crack tip and the crack growth rate variation at different yield strength and stress intensity factor K were analyzed. The crack growth rate will increase with the latter characteristics. By comparing with the SCC experimental data, the prediction model accuracy was verified. The results provide a scientific basis for the prediction of the SCC rate of 304 stainless steel in the high-temperature water environment.
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This work was financially supported by the Natural Science Foundation of China
(51475362), and Key Scientific and Technological Projects in Henan Province of China (202102210068).
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Translated from Problemy Prochnosti, No. 4, pp. 51 – 59, July – August, 2021.
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Cui, Y.H., Zhang, J.L. Research of SCC Prediction Model for 304 Stainless Steel in the High-Temperature Water Environment. Strength Mater 53, 573–581 (2021). https://doi.org/10.1007/s11223-021-00319-6
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DOI: https://doi.org/10.1007/s11223-021-00319-6