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Crack initiation resistance tests of a type 316L stainless steel weld were performed in high temperature and high pressure water. Small-punch test specimens were used under trapezoidal loading. This survey showed that there are two crack initiation modes in such conditions. The crack initiation at the slip line was promoted by a gradient in term of oxide film composition and in term of local environment...
A possible approach in describing the role of the environment in the phenomena behind initiation and propagation of a stress corrosion crack is to assume that the transport of matter and charge through the oxide film on the material is one of the rate-controlling factors. Straining of the bulk material may affect the transport rates of ionic defects, such as vacancies and interstitials, through the...
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