Quality evaluation of laser welds based on air-coupled ultrasound

CHANG Junjie; LI Yuanyuan; HU Chen; Wu Ruifeng

doi:10.12073/j.hjxb.2019400264

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2019 > 40(10): 60-66. > DOI: 10.12073/j.hjxb.2019400264

CHANG Junjie, LI Yuanyuan, HU Chen, Wu Ruifeng. Quality evaluation of laser welds based on air-coupled ultrasound[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(10): 60-66. DOI: 10.12073/j.hjxb.2019400264

Citation:

Quality evaluation of laser welds based on air-coupled ultrasound

1.
Key Lab of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang 330063, China
2.
Japan probe Co., Ltd. Japan Yokohama 2320033, Japan
3.
CRRC Tangshan Co., Ltd., Tangshan 063035, China

More Information

Received Date: September 05, 2018
Available Online: July 12, 2020

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Abstract

Abstract

With the wide application of laser welding technology in automobile and rail transit, the requirements for non-destructive testing of laser welds are getting higher and higher. For the laser welding of two-layer metal sheets below 3 mm, the air-coupled ultrasonic testing technology is discussed. The possibility of detecting the laser weld. Using numerical analysis and experimental analysis, the Lamb wave is excited on the aluminum plate in the air, and laser welding is analyzed by the propagation simulation of the Lamb wave in the laser weld test piece. By studying the propagation simulation of Lamb waves in laser weld specimens, The effect of the width of the laser weld and the quality of the weld on the reflectivity and transmittance are analyzed. The results show that the Lamb wave A0 mode can be used to evaluate the quality of the laser weld.
- air coupling,
- lamb wave,
- thin plate,
- laser welding

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References (21)

References

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Quality evaluation of laser welds based on air-coupled ultrasound