Commercial jet engine manufactures rely hevily on their ability to accurately predict the life of critical components such as high pressure turbine disks. These predictions depend, to a great extent, on the ability of ultrasonic inspection techniques to resolve non-metallic inclusions in finished parts. Consequently premium quality components require a high degree of ultasonic inspectability. Furthermore, the need for early detection and removal of defective material from processing requires forging stock to have a similar level of inspectability. It was the purpose of this study to evaluate the effects of grain structure and phase morphology on the ultrasonic response of high strength nickel-based superalloy billets. Various P/M and cast/wrought billets were characterized and rated with respect to structure, penetration and noise levels. Observations indicate that P/M processing offers a significant improvemnent in inspectability. This high level of inspectability is associated with the fine uniform structures of P/M materials.


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    Title :

    Metallurgical aspects of the ultrasonic inspectability of a high strength P/M and cast/wrought nickel based superalloy


    Additional title:

    Metallurgische Aspekte der Ultraschallprüfbarkeit einer hochfesten pulvermetallurgischen und gegossen/geschmiedeten Superlegierung auf Nickelbasis


    Contributors:
    Keefe, P.W. (author) / McConomy, T. (author)


    Publication date :

    1991


    Size :

    7 Seiten, 4 Bilder, 1 Tabelle, 3 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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