High speed joining process by laser shock forming for the micro range

Abstract

The importance to implement more functionality on the same space pushes miniaturization and makes hybrid joints under various conditions, also in the micro range, necessary. Conventional joining processes, which are used in macro range, cannot be easily transferred to micro range dimensions. In this work a new high speed joining method for the micro range is presented, which is realized by a plastic forming process based on TEA-CO2-Laser induced shockwaves. In a first step it is shown how sheet-sheet joints can be realized with this method. The experimental results illustrate the possibilities as well as the limits of the joining process by laser shock forming. Also the possible defects which can occur during the joining process are presented. Especially fracture of material at the edge. This is explained by the sharp edges in the joining area, which are caused by the production process of the specimen.