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    Effect of Thermocouple Drift on Rupture Life at High Temperature

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    Rupture life of Waspaloy in four tests under 9050-psi stress at 1700 F nominal temperature tended to be longer when temperature was adjusted in accordance with the reading of a noble metal thermocouple than when Type K base metal thermocouples were used. Drift of the reading of the base metal thermocouples relative to that of an adjacent noble metal thermocouple did not exceed 3 F in tests of nearly 400-h duration.


    temperature measurement, thermocouples, drift (instrumentation), accuracy, base metals, precious metals, creep tests, creep rupture strength, tension tests

    Author Information:

    Voorhees, HR
    Technical director, Materials Technology Corp., Ann Arbor, Mich.

    Committee/Subcommittee: E08.03

    DOI: 10.1520/STP26909S