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    Super Waspaloy Microstructure and Properties

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    Waspaloy is currently one of the more widely used alloys for turbine disk applications in the aerospace industry. However, higher engine performance demands by aircraft engine manufacturers have resulted in a number of approaches by material suppliers to upgrade the alloy. These approaches range from simple compositional modifications to a combination of chemistry modifications coupled with thermal mechanical processing. One such approach resulted in what is now commonly referred to as Super Waspaloy.

    Tension, low-cycle fatigue, and creep rupture tests of Waspaloy and Super Waspaloy forgings were conducted from room temperature to 1089 K (1500°F), after which material properties were reviewed and correlated with the disk microstructure.


    steels, microstructure, Waspaloy, Super Waspaloy, closed die forging, physical metallurgy, tension tests, creep rupture, low-cycle fatigue

    Author Information:

    Deye, DJ
    Metallurgist, Materials Applications Group, AiResearch Manufacturing Company of Arizona, Phoenix, Ariz.

    Couts, WH
    Manager, Research and Development, Wyman Gordon Co., North Grafton, Mass.

    Committee/Subcommittee: E04.05

    DOI: 10.1520/STP36892S