The effect of loading rate upon irradiation embrittlement measured by fracture mechanical properties

Kim Wallin, Matti Valo, Rauno Rintamaa, Ralf Ahlstrand

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

    Abstract

    Recent investigations have shown that the Charpy-V test is an unreliable indicator of the true irradiation embrittlement. This has increased the need for a direct measurement of the fracture toughness. In the case of surveillance testing, where the specimen size is typically small, especially two types of tests are attractive, static testing based on the J-integral and dynamic testing performed by the instrumented impact hammer. Many factors speak in favor for the dynamic test. However, it is not clear whether the irradiation embrittlement is depicted similarly by static and dynamic tests. In this work the the effect of loading rate upon irradiation embrittlement measured by fracture mechanical properties is investigated. It is shown that the shift in the fracture toughness transition temperature is smaller for dynamic loading than for static loading and a theoretical explanation for the effect is proposed.
    Original languageEnglish
    Title of host publicationEffects of radiation on materials
    EditorsA.S. Kumar, D.S. Kelles, R.K. Nandstad, E.A. Little
    Place of PublicationPhiladelphia
    PublisherAmerican Society for Testing and Materials (ASTM)
    Pages156-171
    ISBN (Print)978-0-8031-1488-3
    DOIs
    Publication statusPublished - 1993
    MoE publication typeA4 Article in a conference publication
    Event16th International Symposium on the Effects of Radiation on Materials - Denver, United States
    Duration: 23 Jun 199325 Jun 1993

    Publication series

    SeriesASTM Special Technical Publication
    Volume1175
    ISSN0066-0558

    Conference

    Conference16th International Symposium on the Effects of Radiation on Materials
    CountryUnited States
    CityDenver
    Period23/06/9325/06/93

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