Effects of Surface Treatments on Environmentally-Assisted Cracking Susceptibility of Alloy 182 in BWR Environment

Zaiqing Que (Corresponding Author), L. Volpe (Corresponding Author), Aki Toivonen, M.g. Burke, Fabio Scenini, Ulla Ehrnstén

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The effects of four machining surface preparations on the environmentally-assisted cracking (EAC) initiation and early crack growth were evaluated for Alloy 182 flat tapered specimens exposed to a simulated boiling water reactor (BWR) environment under constant extension rate tensile test conditions. Results showed that the apparent EAC critical threshold stress for initiation was highly dependent on the surface treatment. Detailed microstructural characterization revealed the nature of the machining-induced deformation associated with the four surface treatments. Surface treatments affected the surface oxidation during exposure in the simulated BWR environment. The machining-induced deformation structure affected the EAC initiation susceptibility.
Original languageEnglish
Article number109555
JournalCorrosion Science
Volume188
Early online date1 May 2021
DOIs
Publication statusPublished - 1 Aug 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Alloy 182
  • Characterisation
  • Environmentally-assisted cracking
  • Stress corrosion cracking
  • Surface machining

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