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Study on quantitative ultrasonic test for Nd:YAG laser welding of thin stainless steel sheet

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Abstract

In this paper, laser welding for the stainless steel lap joint used in the railway vehicle body has been studied based on the analysis of the ultrasonic test. The weld width is evaluated by the analysis of ultrasonic testing signals during the ultrasonic scanning process. The changes of the echo and main frequency are in good agreement with the positions of the probe. The semi-attenuation method and frequency domain analysis are established based on the A-scan signals and frequency spectrum characteristic curves. From the analysis of the error statistics, the frequency domain analysis has a higher accuracy and stability, which can meet the requirements of engineering applications. The equivalent weld width is defined based on the C-scan imaging and the quantitative ultrasonic test is achieved. The tensile shear measurements of welds show that the equivalent weld widths have the same change rules with the values of the tensile shear strength and provide an important basis for the quality evaluation of the laser welding.

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Acknowledgments

The authors would like to acknowledge the support provided by the Development of “Double World-classes” Subjects of Jilin Province.

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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, Yukuo Tian & Xiaopeng Gu

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

    Jing Liu

Authors
  1. Guanghao Zhou
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  2. Guocheng Xu
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  3. Jing Liu
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  4. Yukuo Tian
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  5. Xiaopeng Gu
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Correspondence to Xiaopeng Gu.

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Zhou, G., Xu, G., Liu, J. et al. Study on quantitative ultrasonic test for Nd:YAG laser welding of thin stainless steel sheet. Int J Adv Manuf Technol 95, 1677–1684 (2018). https://doi.org/10.1007/s00170-017-1338-2

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  • DOI: https://doi.org/10.1007/s00170-017-1338-2

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