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Abstract The effects of temperature, chloride content and dissolved oxygen content on the susceptibility to stress corrosion cracking of type 304 stainless steel in high temperature water have been investigated. Both U bend and slow strain rate stress corrosion tests were performed,complemented by electrochemical polarization curve measurements and extensive oxide film analyses by Auger electron spectroscopy(AES). The U bend data showed decreasing susceptibility to cracking with increasing temperature, which correlated with thicker oxide films and greater enrichment of chromium in the films. In contrast,the slow strain rate tests indicated maximum susceptibility to cracking at 250℃ in the temperature range 200 to 300℃ and the susceptibility to cracking increased with increasing oxide thickness, The extent of chromium enhancements in the oxide layers was different for the two specimen types tested in equivalent environments. It is concluded that the best choice of test procedure for acquiring accelerated test data depnds upon the details of the application. U bend data will be more relevant for truly static load conditions that do not induce dynamic plastic strain, whereas slow strain rate data are more relevant for components that may experience plastic deformation during service.
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Received: 25 February 1992
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Cite this article:
Yang Wu; Zhang Meijie ; Zhao Guozhen (Shanqhai Research Institute of Materials) John Congleton (University of Newcastle upon Tyne). A COMPARISON OF THE TEST PROCEDURES FOR ASSESSING THE STRESS CORROSION CRACKING SUSCEPTIBILITY OF STAINLESS STEEL IN HIGH TEMPERATURE WATER. J Chin Soc Corr Pro, 1992, 12(1): 83-89.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1992/V12/I1/83
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