Institute of Transport and Automation Technology Research Publications
Underwater laser ablation process using an Yb:YAG laser source for the weakening of mild steel sheets for the deflagration of hazardous substances

Underwater laser ablation process using an Yb:YAG laser source for the weakening of mild steel sheets for the deflagration of hazardous substances

Categories Konferenz (reviewed)
Year 2022
Authors Leschke, J.; Emde, B.; Hermsdorf, J.; Overmeyer, L.
Published in Procedia CIRP, Volume 111, Pages 754-757
Description

With an estimated amount of about 1.6 metric million tons, unexploded ordnances (UXO) in the German North and Baltic Sea pose a serious threat to the environment due to increasing corrosion. One way to allow safe salvage of the objects from the sea is to weaken them and then disarm them by low order detonation. This paper deals with the weakening by laser ablation, aiming for the introduction of ablation gaps with a depth of 2/3 the material thickness in 4 and 10 mm thick mild steel samples. An Yb:YAG laser source is used with a laser power of up to 2 kW in combination with a coaxial gas jet supplying the process zone with nitrogen to ensure a controllability of the process and the depth of the gap. The study is thus focused on achieving constant and predictable gap depths.

DOI 10.1016/j.procir.2022.08.119