Towards In-Situ Fumes Composition Monitoring During an Additive Manufacturing Process Using Energy Dispersive X-ray Fluorescence Spectrometry

We present an in-situ energy dispersive X-ray fluorescence measurement of the content of Chromium and Nickel in the fumes produced by selective laser melting on an Inconel 625 powder. Significant variations of the inten-sities of the Chromium and Nickel K ?????? fluorescence lines were evidenced as a function of the laser power, lasing velocity and chamber atmosphere. Calibration has been carried out using Monte-Carlo particle transport simu-lations allowed to obtain a quantitative estimate of the Chromium and Nickel mass fraction in the fumes. The experimental data has been compared to the predictions of an analytical physico-chemical model with consistent results. This approach thus also allows to provide information on the temperature of the metallic bath.