研究目的
Investigating the laser cooling arc plasma effect (LCAPE) during kilo-Watt fiber laser-TIG hybrid welding of 316L stainless steel.
研究成果
The study demonstrated a laser cooling arc plasma effect (LCAPE) in fiber laser-TIG hybrid welding, caused by laser-induced metal vapor. The mechanism includes convection cooling and enhanced radiation of the arc plasma by the metal vapor. This finding broadens the theory of laser-plasma interaction and may influence future plasma modulation and control in industrial applications.
研究不足
The study focuses on short wavelength high power laser-TIG hybrid welding, and the findings may not directly apply to long wavelength laser arc hybrid welding processes.
1：Experimental Design and Method Selection:
The study used a combination of theoretical modeling and experiments to observe the LCAPE. High-speed imaging and spectral measurement systems were employed to capture the arc plasma's behavior and temperature distribution.
2：Sample Selection and Data Sources:
Bead-on-plate fiber laser-TIG hybrid and single TIG welding were performed on 5 mm thick 316L stainless steels.
3：List of Experimental Equipment and Materials:
IPG YLR-4000 fiber laser, Fronius TPS 400 TIG arc welder, high-speed camera with an 808 nm narrow-band filter, spectral measurement system.
4：Experimental Procedures and Operational Workflow:
Welding experiments were conducted with varying distances between the laser beam and the tungsten electrode tip. The arc plasma's temperature and composition were measured under different conditions.
5：Data Analysis Methods:
The Boltzmann diagram method was used to calculate electron temperature from the relative intensities of spectral lines.
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