Effect of Laser Power on Stability of Laser-Twin-Wire Hybrid Welding Process

Xiao Yan Gu; Huan Li; Lin Jie Li

doi:10.4028/www.scientific.net/AMM.341-342.315

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Spectroscopic Analysis of the Plasma in Laser Welding of AZ31 Magnesium Alloy
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Annealing-Induced Transformation of Defects in ZnO Single Crystal and the Effects on the Optical Properties
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Effect of Laser Power on Stability of Laser-Twin-Wire Hybrid Welding Process
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 341-342Effect of Laser Power on Stability of...

Effect of Laser Power on Stability of Laser-Twin-Wire Hybrid Welding Process

Abstract:

Based on the chaos theory and related algorithm, largest Lyapunov analysis of current of laser-twin-wire pulse MIG welding process are performed from the point of view of nonlinear time sequence. Largest Lyapunov exponent (LLE) of characteristic current under different laser power were calculated, meanwhile synchronous high-speed photography was adopted to observe arc shape and droplet transfer. The results indicate that arc shape and the force state of droplets changes as a result of interactions between laser plasma and arc plasma. Addition of low power laser intensifies the interplay of two arcs, which decreases the stability of welding process. When laser power reaches to a certain extent, a stable cathod spot and a conductive channel are obtained for arcs. Stable welding process and small welding spatter are acquired.

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Periodical:

Applied Mechanics and Materials (Volumes 341-342)

Pages:

315-319

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.341-342.315

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Online since:

July 2013

Authors:

Xiao Yan Gu, Huan Li, Lin Jie Li

Keywords:

High-Speed Photography, Largest Lyapunov Exponent, Laser-Twin-Wire Pulse MIG Welding, Metal Transfer

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