Abstract
Irradiation growth and temperature cycling experiments have been performed at 353 and 553 K on specimens taken from both longitudinal and transverse direction of 25% cold-worked zircaloy-2 pressure tube. For the longitudinal data, significant positive strains occur below a dose of 10 24 n/m 2 at both temperatures, the larger strains occurring at the lower temperature. Above this dose, longitudinal growth strains increase almost linearly with irradiation. The linear rate is greater at 553 than 353 K. In transverse specimens, a small positive transient strain occurs below a dose of 10 24 n/m 2 and negative growth rates are observed above this dose. It is suggested that the transient low dose growth behaviour at 353 and 553 K contains a substantial fraction of volume increase. The effects of changes in irradiation temperature on growth strains in cold-worked zircaloy-2 have been studied. Lowering kradiation temperature produces an initial positive transient strain which is almost fully recovered on raising the temperature again. Growth data obtained on longitudinal specimens cycled between 353 and 553 K during irradiation lends strong support to a model of growth for cold worked zircaloy-2 which consists of a transient recoverable growth component due to interstitial clustering on prism planes and a non-recoverable linear component due to interstitial induced dislocation climb.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
