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Study on the correlation between plasma electron temperature and penetration depth in laser welding processes

2010; Elsevier BV; Volume: 5; Linguagem: Inglês

10.1016/j.phpro.2010.08.070

1875-3892

Teresa Sibillano, Antonio Ancona, D. Rizzi, Sergio Saludes Rodil, Javier Rodríguez, Ali Riza Konuk, Ronald G.K.M. Aarts, A.J. Huis in’t Veld,

Surface Roughness and Optical Measurements

The plasma electron temperature has been estimated starting from the spectroscopic analysis of the optical emission of the laser-generated plasma plume during quite diverse stainless steel welding procedures (c.w. CO 2 and pulsed Nd:YAG). Although the optical emissions present different spectral features, a discrete contribution of several iron lines can be highlighted in both types of welding. We have found that the electron temperature decreases as the laser power is enhanced, in static as well as dynamic conditions. Such a result could be useful to develop a closed loop control system of the weld penetration depth.