Journal Published Online: 28 August 2014
Volume 4, Issue 2

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

CODEN: MPCACD

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, DE
Smaga, Marek
Institute of Materials Science and Engineering, Univ. of Kaiserslautern, Kaiserslautern, DE
Eifler, Dietmar
Institute of Materials Science and Engineering, Univ. of Kaiserslautern, Kaiserslautern, DE
Pages: 12
Price: $25.00
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Details
Stock #: MPC20140017
ISSN: 2165-3992
DOI: 10.1520/MPC20140017