Contributo in atti di convegno, 2010, ENG, 10.1016/j.phpro.2010.08.070

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

Sibillano T., Ancona A., Rizzi D., Rodil S.S., Nieto J.R., Konuk A.R., Aarts R., Huis in't Veld A.J.

CNR-IFN UOS Bari, Physics Department, via Amendola 173, I-70126 Bari, Italy CARTIF Parque Tecnológico de Boecillo 205, 47151 Boecillo, Valladoli, Spain Laboratory of Mechanical Automation, University of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands

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.

6th International Conference on Laser Assisted Net Shape Engineering, LANE 2010, pp. 429–436, Erlangen; Germany, 21-24 September 2010

Keywords

Discrete contributions, Dynamic condition, Laser power, Laser welding, Laser-generated plasma, Nd: YAG, Optical emissions, Penetration depth, Plasma electrons, Plasma spectroscopy, Process sensing and controlling, Spectral feature, Stainless steel welding, Temperature decrease, Weld penetrations, Closed loop control systems, Electron temperature, Iron, Laser beam welding, Laser produced plasmas, Light emission, Spectroscopic analysis, Spectroscopy, Stainless steel, Process control

CNR authors

Sibillano Teresa, Ancona Antonio

CNR institutes

IFN – Istituto di fotonica e nanotecnologie