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Author:

Pei, Ning (Pei, Ning.) | Zhao, Bin (Zhao, Bin.) | Bond, Leonard J. (Bond, Leonard J..) | Xu, Chunguang (Xu, Chunguang.)

Indexed by:

EI Scopus SCIE

Abstract:

Longitudinal critically refracted (LCR) waves have already been widely applied for residual stress characterization. Such waves are usually generated using mode-conversion at the first critical angle of the incident longitudinal wave, which gives waves that then propagate at a dip-angle, and this places energy close to the surface of the specimen. The dip-angle needs to be minimized to improve both velocity measurement and residual stress characterization sensitivity. This paper reports a novel double-fold coil phased EMAT that can decrease the dip angle. The performance of this new EMAT was investigated using both a COMSOL model and experiments. Initial model validation was provided through a comparison with experimental data. The EMAT design also enables scanning of samples, and operation in harsh environments where use of a PZT based transducer and couplants can complicate and limit inspection. The use of the EMAT has the potential to give more accurate time of flight (TOF) data and enhances the reliability and accuracy for residual stress measurement.

Keyword:

Phased array Directivity EMAT Residual stress Longitudinal wave

Author Community:

  • [ 1 ] [Pei, Ning]Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China
  • [ 2 ] [Xu, Chunguang]Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China
  • [ 3 ] [Pei, Ning]Beijing Inst Technol, Key Lab Fundamental Sci Adv Machining, Beijing 100081, Peoples R China
  • [ 4 ] [Xu, Chunguang]Beijing Inst Technol, Key Lab Fundamental Sci Adv Machining, Beijing 100081, Peoples R China
  • [ 5 ] [Zhao, Bin]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 6 ] [Bond, Leonard J.]Iowa State Univ, Dept Aerosp Engn, Ames, IA 50010 USA
  • [ 7 ] [Bond, Leonard J.]Iowa State Univ, Ctr Nondestruct Evaluat, Ames, IA 50010 USA

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Source :

ULTRASONICS

ISSN: 0041-624X

Year: 2022

Volume: 125

4 . 2

JCR@2022

4 . 2 0 0

JCR@2022

ESI Discipline: CLINICAL MEDICINE;

ESI HC Threshold:38

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 2

SCOPUS Cited Count: 7

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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