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    Volume 4, Issue 2 (February 2015)

    Special Issue Paper

    Fatigue Monitoring of Austenitic Steels with Electromagnetic Acoustic Transducers (EMATs)

    (Received 30 January 2014; accepted 22 July 2014)

    Published Online: 2015

    CODEN: MPCACD

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    Abstract

    Early detection of fatigue processes in the cyclically loaded metastable austenitic steel AISI 347 was performed by electromagnetic acoustic transducer measurements in total strain-controlled low-cycle fatigue tests at ambient and elevated temperature. The changes in the physical data were interpreted via microstructural changes observed by scanning- and transmission-electron microscopy, as well as x-ray investigations. The application of physically based measurement data, e.g., time-of-flight from electromagnetically activated ultrasonic signals in austenitic fatigue specimens and total strain, enables measurements of a new hysteresis relationship. In analogy to the common stress–strain hysteresis, this hysteresis gives information about the actual state of fatigue and shows significant changes in shape before specimen failure.


    Author Information:

    Sorich, Andreas
    Institute of Materials Science and Engineering, Univ. of Kaiserslautern, Kaiserslautern,

    Smaga, Marek
    Institute of Materials Science and Engineering, Univ. of Kaiserslautern, Kaiserslautern,

    Eifler, Dietmar
    Institute of Materials Science and Engineering, Univ. of Kaiserslautern, Kaiserslautern,


    Stock #: MPC20140017

    ISSN:2165-3992

    DOI: 10.1520/MPC20140017

    Author
    Title Fatigue Monitoring of Austenitic Steels with Electromagnetic Acoustic Transducers (EMATs)
    Symposium ,
    Committee E08