Simplified Equations for Peak Position and for Its Standard Deviation in X-Ray Stress Measurement

    Volume 9, Issue 2 (March 1981)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 8


    Kurita, M
    Assistant professor, Technological University of Nagaoka, Nagaoka,

    Abstract

    Simplified equations for peak position and for its standard deviation resulting from counting statistics are derived in the n points parabola method. These equations are applicable to an even as well as an odd n and can be rapidly calculated even with an inexpensive on-line computer such as a microcomputer. Thus a rapid and precise peak determination can be made by use of these equations with an inexpensive X-ray stress measurement system. Various peak positions calculated by the n points and the three points parabola methods were compared. Two heat-treated steels were used. The n points method, using all the data points that fall above approximately 85% of the maximum intensity, gave the most satisfactory result. On the other hand, the three points method produced a large standard deviation of the peak position unless the three points were taken symmetrically about the diffraction peak.


    Paper ID: JTE11654J

    DOI: 10.1520/JTE11654J

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    Author
    Title Simplified Equations for Peak Position and for Its Standard Deviation in X-Ray Stress Measurement
    Symposium , 0000-00-00
    Committee E28