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Articles you may be interested inEffect of process parameters in laser cladding on substrate melted areas and the substrate melted shape J. Laser Appl. 27, S29201 (2015); 10.2351/1.4906376 Effect of laser and laser hybrid welding on the corrosion performance of a lean duplex stainless steel J. Laser Appl. 22, 150 (2010); 10.2351/1.3533146 Visualization of refraction and attenuation of near-infrared laser beam due to laser-induced plume J. Laser Appl. 21, 96 (2009); 10.2351/1.3110058Interaction between laser beam, process effects, and structural properties during welding using models based on the finite element analysis During laser material processing with high laser beam intensities, a laser-induced vapor formation can occur. Due to the shockwave behavior of the vapor plume and the associated rapid cooling, a significant particle formation can be initiated by nucleation. The laser radiation interacts with the particles which can result in a dynamic change of the intensity distribution on the surface. Especially in the field of laser remote processing, the attenuation of laser radiation by nanoparticles can influence the process stability and reduce the processing quality. The presented work is focused on the particle formation at a height of 10 mm above the material surface during the laser welding of stainless steel with a fiber laser. The laser beam intensity on the surface was varied between 1.3 and 5.1 MW/cm 2 . Transmission electron microscopy images of the nanoparticles and high speed images of the vapor propagation in the ambient atmosphere were analyzed. The attenuation of a probe beam in the vapor plume was evaluated in dependence on the wavelength. The results indicate a linear connection between the laser beam power and the particle formation rate. V C 2015 Laser Institute of America. [http://dx.

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