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Ultrasonic C-scan detection research for effective connection area of arc-stud-weld joints

  • Juan Dong
  • Guocheng Xu
  • Lingbo Wei
  • Guoquan Fan
  • Xiaopeng GuEmail author
ORIGINAL ARTICLE
  • 55 Downloads

Abstract

Ultrasonic echo signal analysis and C-scan detection are used to investigate arc-stud welds (ASWs). The different connection zones of ASW joints are identified based on the variation of the ultrasonic echo in the time domain and time–frequency domain. The amplitude of the first echo in the time domain is used to differentiate an ASW joint from the base metal. The analysis in the time–frequency domain shows that the fusion and weak connection zones of an ASW joint can be distinguished based on the amplitude at a frequency of 5.6 MHz, and the defects in an ASW joint can be precisely detected based on the amplitude at a frequency of 37.5 MHz. A compound ultrasonic C-scan image based on the amplitudes at these specific frequencies is adopted to intuitively display the actual connection status of an ASW joint. According to this image, the joint diameter and defect dimensions can be quantitatively analyzed. This method provides an effective quality assessment method for an ASW joint.

Keywords

Arc-stud welding Ultrasonic C-scan detection Wavelet package analysis Quantitative defect assessment 

Notes

Funding information

This research work was supported financially by the following projects:

1. The Province-University Joint Construction Plan of Jilin Province, the project no. is SXGJSF2017-3, People’s Republic of China

2. The National Natural Science Foundation of China (NSFC), the project no. is 51607010, People’s Republic of China

3. The Science and Technology Development Plan of Jilin Province, the project no. is 20180201004G X, People’s Republic of China

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of Automobile Materials of Ministry of Education and Department of Materials Science and EngineeringJilin UniversityChangchunPeople’s Republic of China
  2. 2.School of EngineeringChangchun Normal UniversityChangchunPeople’s Republic of China
  3. 3.China FAW Co.Ltd. R&D CenterChangchunPeople’s Republic of China

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