Experimental study of magnesium and aluminium alloys absorption and keyhole evolution during laser interaction Nd:YAG interaction

Abstract

In the laser processes such as laser welding and heat surface treatment, the absorption factor of laser Nd :YAG by metals plays a very important role. Its evolution depends on many parameters such as temperature or surface conditions. In this paper, we present a method based on the measurement of reflected energy during the laser process, carried out on two types of magnesium alloys (WE43 and RZ5) and aluminum alloy 1xxx. An integrating sphere coupled with a photodiode and a numerical oscilloscope is used.In the laser processes such as laser welding and heat surface treatment, the absorption factor of laser Nd :YAG by metals plays a very important role. Its evolution depends on many parameters such as temperature or surface conditions. In this paper, we present a method based on the measurement of reflected energy during the laser process, carried out on two types of magnesium alloys (WE43 and RZ5) and aluminum alloy 1xxx. An integrating sphere coupled with a photodiode and a numerical oscilloscope is used.