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Simulation and experimental study on the quality evaluation of laser welds based on ultrasonic test

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Abstract

An evaluating method for the laser weld quality of a stainless steel lap joint is studied herein, based on an ultrasonic testing simulation and an experimental study. A laser weld model is established for the simulation focusing on the analysis of the transient distribution of the acoustic waves and the A-scan signal during the ultrasonic test process. According to the simulation and the experimental study on the scanning process, particularly the scanning direction vertical to the weld, the weld centre is confirmed by the characteristic of the first echo from the bottom of the upper sheet, where an echo amplitude increase occurs. A mathematical model calculating the welding pool width is established based on the position of the weld centre. The results show that the mathematical model has a higher accuracy when the probe is located on the weld centre. The error of the mathematical model is within 0.05 mm, and the accuracy can completely meet the engineering application requirements.

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Authors and Affiliations

  1. Key Laboratory of Automobile Materials of Ministry of Education and Department of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun, 130025, People’s Republic of China

    Guanghao Zhou, Guocheng Xu, Xiaopeng Gu & Yukuo Tian

  2. Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, No. 5988 Renmin Street, Changchun, 130025, People’s Republic of China

    Jing Liu & Liang Zhou

Authors
  1. Guanghao Zhou
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  2. Guocheng Xu
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  3. Xiaopeng Gu
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  4. Jing Liu
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  5. Yukuo Tian
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  6. Liang Zhou
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Corresponding author

Correspondence to Xiaopeng Gu.

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Zhou, G., Xu, G., Gu, X. et al. Simulation and experimental study on the quality evaluation of laser welds based on ultrasonic test. Int J Adv Manuf Technol 93, 3897–3906 (2017). https://doi.org/10.1007/s00170-017-0816-x

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  • DOI: https://doi.org/10.1007/s00170-017-0816-x

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