1. Enhanced melt pool stirring in welding with dynamic polarised laser beam.
- Author
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Gräf, S., Staupendahl, G., Seiser, C., Meyer, B.-J., and Müller, F. A.
- Subjects
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WELDING , *LASER beams , *SOLDER & soldering , *METALLOGRAPHY , *PHYSICAL metallurgy - Abstract
The stirring of the molten material during CO2 laser welding with a dynamic polarised laser beam (DP) was studied. The key element of the set-up is a high power interference laser beam modulator for CW power rating up to 4 kW. Metallographic cross-sections and EDX analyses of the realised welds in St37 using the contrast material nickel proved the enhancement of melt pool stirring due to DP. Moreover, roughness measurements confirmed a smoothing of the top bead surface as well as a correlation between melt pool stirring and the formation of the top bead ripple structure. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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