High resolution crystallographic and chemical characterisation of iodine induced stress corrosion crack tips formed in irradiated and non-irradiated zirconium alloys

Conor Gillen, Alistair Garner, Christopher Jones, Katie Moore, Pia Tejland, Philipp Frankel

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Abstract

High resolution crystallographic and chemical analysis has been performed on iodine-induced stress corrosion crack tips taken from irradiated and non-irradiated zirconium alloys. Defuelled cladding tubes were subjected to mandrel testing and subsequent analysis of the crack tip region showed the predominance of transgranular cracking on non-basal planes for the first time in irradiated material. In a separate mandrel-tested crack tip sample, iodine
was unambiguously identified in the crack tip region using both STEM-EDX and NanoSIMS. For comparison, non-irradiated C-ring samples were subjected to testing in iodine-ethanol solution, subsequent crack tip analysis showed large levels of intergranular attack and no significant iodine segregation.
Original languageEnglish
Pages (from-to)166-172
Number of pages7
JournalJournal of Nuclear Materials
Volume519
Early online date21 Mar 2019
DOIs
Publication statusPublished - 1 Jun 2019

Research Beacons, Institutes and Platforms

  • Photon Science Institute
  • Dalton Nuclear Institute

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