Pellerin Nadia

Due to its high productivity, gas metal arc welding with electrode wire is widely used in the industry. It is based on the creation of an electric arc between a consumable anode wire and the workpiece. The objective of this work is to understand some phenomena observed in MIG-MAG (Metal Inert Gas - Metal Active Gas) to improve the quality of the process and possibly suggest new operating methods.
For this purpose, this work will be based on a spectroscopic diagnostic to evaluate the distributions of temperature, density and metal vapor in the arc. Analysis by high speed camera is also used to observe the attachment of the arc column at the electrode wire, and the metal transfer. And finally, a micrographic analysis of electrodes is performed to study the influence of chemical and structural changes on the overall behavior of the process, and better understand the interaction between molten metal and plasma.