NDT methods for revealing anomalies and defects in gas turbine blades

Jorma Pitkänen, Toni Hakkarainen, Harri Jeskanen, Petri Kuusinen, Kari Lahdenperä, Pauli Särkiniemi, M. Kemppainen, M. Pihkakoski

    Research output: Contribution to journalArticleScientificpeer-review

    11 Citations (Scopus)

    Abstract

    The amount of energy produced by gas turbines is increasing all over the world. One important part in these gas turbines is the turbine blading. Improved blades and vanes are being introduced while the industry also uses the old generation of blade types. Applicable NDT methods are needed for all blade types. Many NDT-methods can be applied in laboratory environment. This overview describes a variety of methods for blade inspection such as dye penetrant, eddy current, radiography and ultrasonic methods. Some of these methods are considered on the basis of the experience gained in measurements. One new UT-method is described, easily transferable for practical inspections on site. A wide aperture VTT probe has been developed for the purpose. With this special probe different blade properties can be measured, such as coating thickness, detection and size of cracks, delaminations as well as mechanical properties.
    Original languageEnglish
    Pages (from-to)601-604
    Number of pages4
    JournalInsight: Non-Destructive Testing and Condition Monitoring
    Volume43
    Issue number9
    Publication statusPublished - 2001
    MoE publication typeA1 Journal article-refereed

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  • Cite this

    Pitkänen, J., Hakkarainen, T., Jeskanen, H., Kuusinen, P., Lahdenperä, K., Särkiniemi, P., Kemppainen, M., & Pihkakoski, M. (2001). NDT methods for revealing anomalies and defects in gas turbine blades. Insight: Non-Destructive Testing and Condition Monitoring, 43(9), 601-604.