TY - JOUR
T1 - Demonstration of the applicability of nondestructive microwave testing to the long-range inspection of inner-surface cracks in tubes
AU - Sasaki, Kota
AU - Katagiri, Takuya
AU - Yusa, Noritaka
AU - Hashizume, Hidetoshi
N1 - Funding Information:
The authors deeply thank Dr. Takashi Wakai of the Japan Atomic Energy Agency for his kind assistance in conducting the experiment. This study was supported by a Grant-in-Aid for JSPS Fellows and JSPS KAKENHI Number 15K14298.
Publisher Copyright:
© 2017 The Japan Institute of Metals and Materials.
PY - 2017
Y1 - 2017
N2 - This study evaluated the applicability of nondestructive microwave testing method for the long-range detection of inner-surface cracks in metallic tubes. Two seamless straight tubes 7 m in length and 23.0 mm in inner diameter were prepared, and artificial circumferential slits penetrating the tube walls were introduced. A probe to propagate microwave inside the tube, designed based on three-dimensional finite element simulations, was attached to an end of the tube, and the reflections of the microwave propagating inside the tube were measured using a network analyzer. The experiments confirmed clear reflections due to the slits situated 6 m away from the probe. Furthermore, imposing a signal processing method to compensate for the dispersion of the microwave clarified the reflections and enabled the slit to be localized quantitatively from the time-of-flight of the reflections.
AB - This study evaluated the applicability of nondestructive microwave testing method for the long-range detection of inner-surface cracks in metallic tubes. Two seamless straight tubes 7 m in length and 23.0 mm in inner diameter were prepared, and artificial circumferential slits penetrating the tube walls were introduced. A probe to propagate microwave inside the tube, designed based on three-dimensional finite element simulations, was attached to an end of the tube, and the reflections of the microwave propagating inside the tube were measured using a network analyzer. The experiments confirmed clear reflections due to the slits situated 6 m away from the probe. Furthermore, imposing a signal processing method to compensate for the dispersion of the microwave clarified the reflections and enabled the slit to be localized quantitatively from the time-of-flight of the reflections.
KW - Electromagnetic nondestructive evaluation
KW - Finite element simulation
KW - Localization
KW - Signal processing
KW - Time of flight
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U2 - 10.2320/matertrans.M2017008
DO - 10.2320/matertrans.M2017008
M3 - Article
AN - SCOPUS:85016398015
SN - 1345-9678
VL - 58
SP - 692
EP - 696
JO - Materials Transactions
JF - Materials Transactions
IS - 4
ER -