A Simplified Method for Determining Relaxation Time and Electrical Resistivity from Eddy-Current Decay Measurements

    Volume 18, Issue 6 (November 1990)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 4


    Richards, GL
    Undergraduate Mechanical Engineering Student and Associate Professor of Mechanical Engineering, Texas A&M University, College Station, TX

    Hartwig, KT
    Undergraduate Mechanical Engineering Student and Associate Professor of Mechanical Engineering, Texas A&M University, College Station, TX

    (Received 10 October 1989; accepted 20 March 1990)

    Abstract

    A simple method of calculating the relaxation time (τ) from a direct-current eddy-current decay signal is developed. The solution for τ: τ=Δtln[V1V2V2V3] requires only that the three voltage (V)-time (t) sets be separated by equal time intervals (Δt), and be within the simple exponential region of the decay curve. The result is useful for electrical resistivity measurements taken by the eddy-current decay method.


    Paper ID: JTE12515J

    DOI: 10.1520/JTE12515J

    ASTM International is a member of CrossRef.

    Author
    Title A Simplified Method for Determining Relaxation Time and Electrical Resistivity from Eddy-Current Decay Measurements
    Symposium , 0000-00-00
    Committee E28