Measurement of Fatigue-Creep Dynamic Back Stress and Strain Rate Equation of a Fe-Ni-Cr Alloy

    Volume 26, Issue 6 (November 1998)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 2


    He, Q
    Northern Jiaotong University, Beijing,

    Chen, G
    University of Science and Technology Beijing, Beijing,

    Zhang, S
    University of Science and Technology Beijing, Beijing,

    (Received 18 September 1997; accepted 9 June 1998)

    Abstract

    A new testing method for measurement of dynamic back stress for fatigue-creep interaction with predominant creep at high mean stress is developed according to the principle of dropped stress creep. A series of dropped stress creep tests were performed repeatedly until an unlimited extensive incubation with zero creep rate at a given dropped stress occurred. The stress causing zero creep rate is defined as fatigue-creep dynamic back stress. The developed method was used successfully to measure the dynamic back stress for fatigue-creep interaction with predominant creep. The dynamic effective stress could yield a better description of the strain rate equation for the fatigue-creep interaction at high mean stress. Mean stress plays a predominant role in determining fatigue-creep strain rate.


    Paper ID: JTE12120J

    DOI: 10.1520/JTE12120J

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    Title Measurement of Fatigue-Creep Dynamic Back Stress and Strain Rate Equation of a Fe-Ni-Cr Alloy
    Symposium , 0000-00-00
    Committee E08