Volume Fraction Determination in Cast Superalloys and Directionally Solidified Eutectic Alloys by a New Manual Point Count Practice

    Volume 6, Issue 1 (January 1978)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 9


    Andrews, CW
    HeadMember of ASTM, Electron Optics and Microscopy Unit, NASA Lewis Research Center, Cleveland, Ohio

    Abstract

    Volume fraction of a constituent or phase was estimated in six specimens of conventional and directionally solidifed eutectic alloys in accordance with ASTM Recommended Practice for Determining Volume Fraction by Systematic Manual Point Count (E 562–76). Volume fractions determined ranged from 0.086 to 0.36, and with one exception the 95% relative confidence limits were approximately 10% of the determined volume fractions. Since the confidence limit of 10%, which had been arbitrarily chosen previously, was achieved in all but one case, this application of Recommended Practice E 562-76 was considered successful.


    Paper ID: JTE10914J

    DOI: 10.1520/JTE10914J

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    Author
    Title Volume Fraction Determination in Cast Superalloys and Directionally Solidified Eutectic Alloys by a New Manual Point Count Practice
    Symposium , 0000-00-00
    Committee E04