Assessment of the thermal damage in the superalloy GTD-111

Kjeld Borggreen, Pertti Auerkari

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

    2 Citations (Scopus)


    Samples of the superalloy GTD-111 used for blades in gas turbines have been artificially thermal damaged by use of either isothermal or isochronous heat treatment up to the point of incipient melting. The microstructure has been assessed by use of SEM and subsequent image analysis of both the large cuboidal g'-particles and the fine ageing g'-particles. The area density of the fine ageing g'-particles in the core of the dendrites may be used for estimation of the stage of thermal damage up to the point of damage, where all fine particles are dissolved. The generated atlas of microstructures may be helpful for giving rough estimates of the thermal history up to the stage of incipient melting.
    Original languageEnglish
    Title of host publicationBALTICA V
    Subtitle of host publicationCondition and Life Management for Power Plants
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    ISBN (Electronic)951-38-5715-8
    ISBN (Print)951-38-5714-X
    Publication statusPublished - 2001
    MoE publication typeA4 Article in a conference publication
    EventBALTICA V - Condition and Life Management for Power Plants - Porvoo, Finland
    Duration: 6 Jun 20018 Jun 2001

    Publication series

    SeriesVTT Symposium


    ConferenceBALTICA V - Condition and Life Management for Power Plants
    Abbreviated titleBaltica V


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