High-resolution characterisation of austenitic stainless steel in PWR environments: effect of strain and surface finish on crack initiation and propagation.

G. Pimentel, DR Tice, V. Addepalli, K. J. Mottershead, M. Grace Burke, Fabio Scenini, John Lindsay, Yong Liang Wang, S. Lozano-Perez

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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    Abstract

    Initiation and propagation of cracks under simulated primary water conditions and different slow strain rates have been studied for an austenitic 304-type stainless steel. Two surface finishes were used to better understand the conditions that trigger stress corrosion cracking (SCC).
    The main objective is to identify the mechanism(s) that govern the initiation and propagation of SCC and the influence of microstructure. Crack morphology, stress localisation and local chemical composition were characterized for all samples studied. The characterization methodology includes scanning electron microscopy (SEM), 3D focused ion beam (FIB), Transmission Kikuchi Diffraction (TKD), and analytical scanning transmission electron microscopy (STEM).
    Original languageEnglish
    Title of host publicationProceedings of the 18th International Conference on Environmental Degradation in Nuclear Power Systems – Water Reactors
    Pages829-847
    Number of pages19
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Stress corrosion cracking (SCC)
    • slow strain rate test (SSRT)
    • Transmission Kikuchi Diffraction (TKD)
    • Electron Energy Loss Spectroscopy (EELS)

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