Correlation between plume fluctuation and keyhole dynamics during fiber laser keyhole welding
Source abstract
Abstract
In order to reveal the fluctuation mechanism of the plume induced during fiber laser keyhole welding, dynamic behaviors of both the plume and the keyhole were simultaneously observed by using the multiple-imaging method. The results show that the fluctuation period of the plume was the same as that of the laser-induced vapor moving down on the keyhole front wall (KFW). The tilt angle of the plume was the largest when the laser-induced vapor was close to the orifice. As the laser-induced vapor moved toward the bottom of the KFW, the tilt angle of the plume decreased gradually. The correlation between the plume fluctuation and the dynamics of the laser-induced vapor on the KFW was not affected by parameters such as welding speed, laser power, and focal length. Further analysis shows that the periodic drilling behavior of the laser spot on the KFW is the main reason for the periodic fluctuation of the plume.
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Research context
OpenAlex topics: Welding Techniques and Residual Stresses · Laser Material Processing Techniques · Additive Manufacturing Materials and Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
High-Power and Ultrafast Laser Manufacturing Lab, Institute of Laser Engineering, Beijing University of Technology , Beijing 100124, China
Funding
Foundation for Innovative Research Groups of the National Natural Science Foundation of China
References (24)
Show source-provided references
1. Effects of heat input on weld-bead geometry, surface chemical composition, corrosion behavior and thermal properties of fiber laser-welded Nitinol shape memory alloy10.1007/s11665-019-04146-4 ↗
2. Optimisation of process parameters and weld shape of high power Yb-fiber laser welded 2024-T3 aluminium alloy10.1016/j.jmapro.2018.05.028 ↗
3. Comparison of the microstructure and mechanical performance of 2a97 Al-Li alloy joints between autogenous and non-autogenous laser welding10.1016/j.matdes.2017.02.003 ↗
4. Weld formation mechanism during fiber laser welding of aluminum alloys with focus rotation and vertical oscillation10.1016/j.jmapro.2018.10.004 ↗
5. Ultra-narrow-groove laser welding for heavy sections in ITER
6. Ytterbium fiber laser welding of Ti6Al4V alloy10.1016/j.jmapro.2015.07.003 ↗
7. Effect of plume on weld penetration during high-power fiber laser welding10.2351/1.4940148 ↗
8. Investigation of the vapour-plasma plume in the welding of titanium by high-power ytterbium fibre laserradiation10.1070/QE2015v045n03ABEH015577 ↗
9. Spectral diagnostics of a vapor-plasma plume produced during welding with a high-power ytterbium fiber laser10.1134/S0030400X13070205 ↗
10. Characteristics of plasma plume in fiber laser welding of aluminum alloy10.1016/j.apsusc.2014.11.136 ↗
11. Real-time monitoring of coaxial protection fiber laser welding of austenitic stainless steels10.3788/CJL201744.0502003 ↗
12. Influence of steady magnetic field on dynamic behavior mechanism in full penetration laser beam welding10.1016/j.jmapro.2017.03.007 ↗
13. Effects of scan speed on vapor plume behavior and spatter generation in laser powder bed fusion additive manufacturing10.1016/j.jmapro.2018.09.011 ↗
14. A study on plasma plume fluctuation characteristic during A304 stainless steel laser welding10.1016/j.jmapro.2018.04.001 ↗
15. The effect of Ar and He shielding gas on fibre laser weld shape and microstructure in AA 2024-T310.1016/j.jmapro.2017.07.011 ↗
16. Characterisation of plasma induced during high power fibre laser welding of stainless steel10.1179/136217108X329313 ↗
17. Study on the periodic oscillation of plasma/vapour induced during high power fibre laser penetration welding10.1016/j.optlastec.2011.05.020 ↗
18. Dynamics of vapor plume in transient keyhole during laser welding of stainless steel: Local evaporation, plume swing and gas entrapment into porosity10.1016/j.optlaseng.2016.01.019 ↗
19. Dynamic characteristics and mechanisms of compressible metallic vapor plume behaviors in transient keyhole during deep penetration fiber laser welding10.1007/s00339-016-0230-5 ↗
20. Spectroscopic measurements of plasma inside the keyhole in deep penetration laser welding10.1088/0022-3727/38/5/007 ↗
21. A novel ‘sandwich’ method for observation of the keyhole in deep penetration laser welding10.1016/j.optlaseng.2007.08.010 ↗
22. Direct observation of keyhole characteristics in deep penetration laser welding with a 10 kW fiber laser10.1364/OE.21.019997 ↗
23. Interaction between the laser beam and keyhole wall during high power fiber laser keyhole welding10.1364/OE.25.017650 ↗
24. Experimental and theoretical characterization of deep penetration welding threshold induced by 1-μm laser10.1016/j.apsusc.2015.09.198 ↗