An interpolative model has been developed to calculate the cyclic crack growth rate of an advanced aircraft engine disk alloy (AF115). The test variables included within the model consists of stress ratio, temperature, frequency, and hold time. The model was based on experimental results conducted within a statistically designed test program. A nonsymmetric Sigmoidal equation consisting of six independent coefficients was used to equate stress intensity range to cyclic growth rate. Two verification tests were conducted the development of the model to evaluate the model. (DePo)


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    Title :

    Crack growth modeling in an advanced powder metallurgy alloy


    Additional title:

    Modellierung der Rissbildung in einer fortschrittlichen Pulvermetallegierung


    Contributors:
    Utah, D.A. (author)

    Published in:

    Publication date :

    1980


    Size :

    145 Seiten


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English




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