Laser Micro-welding Applied to Target Manufacturing

In this work, samples of ultrapure aluminum (content 99.999%) and AA 5083 aluminum alloy (Al-Mg) have been welded under conduction regime, with a pulsed Nd:YAG laser. Due to the very specific final application (use of aluminum assemblies in cryogenic conditions), stringent specifications are imposed for the weld in terms of thermal conductivity and gas tightness at a temperature of 18°K. Process conditions were refined and were validated according to our cryogenic criteria