Study on dynamic behavior of plasma in deep penetration laser welding of TC4 titanium alloy based on triple-probe detection

ZHANG Hanbo; YANG Lijun; TIAN Yunfu; HUANG Yiming; WANG Ying

doi:10.12073/j.hjxb.20240430003

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2024 > 45(11): 101-109. > DOI: 10.12073/j.hjxb.20240430003

ZHANG Hanbo, YANG Lijun, TIAN Yunfu, HUANG Yiming, WANG Ying. Study on dynamic behavior of plasma in deep penetration laser welding of TC4 titanium alloy based on triple-probe detection[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(11): 101-109. DOI: 10.12073/j.hjxb.20240430003

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Study on dynamic behavior of plasma in deep penetration laser welding of TC4 titanium alloy based on triple-probe detection

1.
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
2.
Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300350, China

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Received Date: April 29, 2024
Available Online: December 05, 2024

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Abstract

Abstract

In deep penetration laser welding, the generation of the laser-induced plasma exhibits significant randomness and temporal variability. A novel passive triple-probe electrical signal acquisition device was utilized to collect the plasma electrical signals with high temporal resolution, thereby obtaining the large sample of thermodynamic information, including plasma temperature. K-means clustering, an unsupervised learning method, was used to conduct the clustering analysis of the complex dynamic behaviors of the plasma. The results indicated that under the experimental conditions of present work, the frequency of the plasma eruption mainly fell within the range of 1240-2200 Hz, and the temperature change rate was primarily distributed between 5000-30000 K/ms. Additionally, the sway frequency of the plasma was mainly observed in the range of 1050-1410 Hz, and the temperature change rate concentrated between 200-2000 K/ms. Consequently, there was a significant difference in the temperature change rates between plasma eruption and sway.
- deep penetration laser welding,
- electrical signal,
- plasma dynamic behavior,
- clustering analysis

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References (17)

References

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Study on dynamic behavior of plasma in deep penetration laser welding of TC4 titanium alloy based on triple-probe detection